./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/vogal-1.i --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_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/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_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/vogal-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/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_8887fcab-a14c-41a5-a48d-e7c2396d6255/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 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:44:06,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:44:06,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:44:06,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:44:06,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:44:06,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:44:06,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:44:06,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:44:06,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:44:06,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:44:06,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:44:06,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:44:06,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:44:06,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:44:06,984 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:44:06,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:44:06,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:44:06,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:44:06,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:44:07,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:44:07,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:44:07,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:44:07,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:44:07,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:44:07,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:44:07,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:44:07,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:44:07,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:44:07,020 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:44:07,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:44:07,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:44:07,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:44:07,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:44:07,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:44:07,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:44:07,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:44:07,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:44:07,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:44:07,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:44:07,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:44:07,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:44:07,031 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:44:07,072 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:44:07,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:44:07,073 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:44:07,074 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:44:07,081 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:44:07,081 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:44:07,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:44:07,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:44:07,082 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:44:07,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:44:07,084 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:44:07,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:44:07,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:44:07,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:44:07,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:44:07,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:44:07,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:44:07,085 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:44:07,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:44:07,086 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:44:07,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:44:07,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:44:07,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:44:07,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:44:07,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:44:07,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:44:07,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:44:07,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:44:07,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:44:07,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:44:07,090 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:44:07,090 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:44:07,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:44:07,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:44:07,091 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_8887fcab-a14c-41a5-a48d-e7c2396d6255/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e [2021-11-20 05:44:07,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:44:07,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:44:07,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:44:07,414 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:44:07,415 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:44:07,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/loops/vogal-1.i [2021-11-20 05:44:07,505 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/data/057b6c058/ab014a44c753426bb588395446955329/FLAGd2e520343 [2021-11-20 05:44:08,013 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:44:08,014 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/sv-benchmarks/c/loops/vogal-1.i [2021-11-20 05:44:08,020 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/data/057b6c058/ab014a44c753426bb588395446955329/FLAGd2e520343 [2021-11-20 05:44:08,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/data/057b6c058/ab014a44c753426bb588395446955329 [2021-11-20 05:44:08,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:44:08,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:44:08,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:44:08,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:44:08,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:44:08,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:44:08" (1/1) ... [2021-11-20 05:44:08,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@437d0162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:08, skipping insertion in model container [2021-11-20 05:44:08,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:44:08" (1/1) ... [2021-11-20 05:44:08,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:44:08,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:44:08,656 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_8887fcab-a14c-41a5-a48d-e7c2396d6255/sv-benchmarks/c/loops/vogal-1.i[895,908] [2021-11-20 05:44:08,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:44:08,692 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:44:08,712 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_8887fcab-a14c-41a5-a48d-e7c2396d6255/sv-benchmarks/c/loops/vogal-1.i[895,908] [2021-11-20 05:44:08,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:44:08,738 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:44:08,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:08 WrapperNode [2021-11-20 05:44:08,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:44:08,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:44:08,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:44:08,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:44:08,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:08" (1/1) ... [2021-11-20 05:44:08,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:08" (1/1) ... [2021-11-20 05:44:08,777 INFO L137 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 133 [2021-11-20 05:44:08,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:44:08,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:44:08,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:44:08,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:44:08,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:08" (1/1) ... [2021-11-20 05:44:08,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:08" (1/1) ... [2021-11-20 05:44:08,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:08" (1/1) ... [2021-11-20 05:44:08,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:08" (1/1) ... [2021-11-20 05:44:08,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:08" (1/1) ... [2021-11-20 05:44:08,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:08" (1/1) ... [2021-11-20 05:44:08,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:08" (1/1) ... [2021-11-20 05:44:08,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:44:08,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:44:08,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:44:08,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:44:08,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:08" (1/1) ... [2021-11-20 05:44:08,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:44:08,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:44:08,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:44:08,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:44:08,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:44:08,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:44:08,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:44:08,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:44:08,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:44:08,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:44:08,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:44:08,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:44:09,030 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:44:09,032 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:44:09,301 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:44:09,307 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:44:09,307 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-20 05:44:09,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:44:09 BoogieIcfgContainer [2021-11-20 05:44:09,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:44:09,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:44:09,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:44:09,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:44:09,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:44:08" (1/3) ... [2021-11-20 05:44:09,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f0f920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:44:09, skipping insertion in model container [2021-11-20 05:44:09,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:08" (2/3) ... [2021-11-20 05:44:09,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f0f920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:44:09, skipping insertion in model container [2021-11-20 05:44:09,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:44:09" (3/3) ... [2021-11-20 05:44:09,325 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2021-11-20 05:44:09,331 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:44:09,331 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:44:09,394 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:44:09,403 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 05:44:09,404 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:44:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:09,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 05:44:09,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:09,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:44:09,432 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:09,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:09,438 INFO L85 PathProgramCache]: Analyzing trace with hash 388073842, now seen corresponding path program 1 times [2021-11-20 05:44:09,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:09,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938288036] [2021-11-20 05:44:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:09,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:44:09,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:09,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938288036] [2021-11-20 05:44:09,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938288036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:44:09,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:44:09,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:44:09,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499172659] [2021-11-20 05:44:09,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:44:09,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:44:09,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:09,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:44:09,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:44:09,708 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:09,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:09,731 INFO L93 Difference]: Finished difference Result 54 states and 82 transitions. [2021-11-20 05:44:09,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:44:09,735 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 05:44:09,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:09,743 INFO L225 Difference]: With dead ends: 54 [2021-11-20 05:44:09,743 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 05:44:09,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:44:09,751 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:09,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:44:09,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 05:44:09,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-20 05:44:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-11-20 05:44:09,788 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2021-11-20 05:44:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:09,789 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-11-20 05:44:09,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:09,789 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-11-20 05:44:09,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 05:44:09,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:09,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:44:09,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:44:09,791 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:09,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2016618829, now seen corresponding path program 1 times [2021-11-20 05:44:09,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:09,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327321351] [2021-11-20 05:44:09,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:09,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:44:09,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:09,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327321351] [2021-11-20 05:44:09,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327321351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:44:09,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:44:09,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:44:09,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566511218] [2021-11-20 05:44:09,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:44:09,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:44:09,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:09,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:44:09,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:44:09,929 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:09,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:09,984 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2021-11-20 05:44:09,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:44:09,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 05:44:09,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:09,986 INFO L225 Difference]: With dead ends: 64 [2021-11-20 05:44:09,986 INFO L226 Difference]: Without dead ends: 43 [2021-11-20 05:44:09,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:44:09,989 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:09,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:44:09,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-20 05:44:09,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2021-11-20 05:44:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-11-20 05:44:09,996 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2021-11-20 05:44:09,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:09,997 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-11-20 05:44:09,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:09,997 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-11-20 05:44:09,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 05:44:09,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:09,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:44:09,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:44:09,999 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:09,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:09,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2094228111, now seen corresponding path program 1 times [2021-11-20 05:44:10,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:10,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024143288] [2021-11-20 05:44:10,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:10,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:44:10,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:10,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024143288] [2021-11-20 05:44:10,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024143288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:10,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734860880] [2021-11-20 05:44:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:10,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:10,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:44:10,088 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:44:10,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:44:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:10,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:44:10,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:44:10,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:44:10,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734860880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:44:10,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:44:10,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-20 05:44:10,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176767757] [2021-11-20 05:44:10,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:44:10,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:44:10,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:10,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:44:10,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:44:10,346 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:10,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:10,416 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-11-20 05:44:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:44:10,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-20 05:44:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:10,419 INFO L225 Difference]: With dead ends: 52 [2021-11-20 05:44:10,419 INFO L226 Difference]: Without dead ends: 48 [2021-11-20 05:44:10,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:44:10,421 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:10,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 124 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:44:10,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-20 05:44:10,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2021-11-20 05:44:10,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:10,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2021-11-20 05:44:10,432 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 17 [2021-11-20 05:44:10,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:10,433 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2021-11-20 05:44:10,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:10,433 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2021-11-20 05:44:10,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 05:44:10,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:10,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:44:10,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:10,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:10,651 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:10,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:10,651 INFO L85 PathProgramCache]: Analyzing trace with hash 2138024952, now seen corresponding path program 1 times [2021-11-20 05:44:10,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:10,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7781131] [2021-11-20 05:44:10,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:10,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:44:10,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:10,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7781131] [2021-11-20 05:44:10,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7781131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:10,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765104005] [2021-11-20 05:44:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:10,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:10,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:44:10,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:44:10,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:44:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:10,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:44:10,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:44:10,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:44:10,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765104005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:44:10,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:44:10,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-20 05:44:10,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921258821] [2021-11-20 05:44:10,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:44:10,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:44:10,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:10,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:44:10,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:44:10,982 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:11,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:11,026 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2021-11-20 05:44:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:44:11,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-20 05:44:11,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:11,028 INFO L225 Difference]: With dead ends: 97 [2021-11-20 05:44:11,028 INFO L226 Difference]: Without dead ends: 69 [2021-11-20 05:44:11,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:44:11,030 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:11,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 73 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:44:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-20 05:44:11,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2021-11-20 05:44:11,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:11,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2021-11-20 05:44:11,039 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 23 [2021-11-20 05:44:11,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:11,039 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2021-11-20 05:44:11,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:11,040 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2021-11-20 05:44:11,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 05:44:11,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:11,041 INFO L514 BasicCegarLoop]: trace histogram [2, 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 05:44:11,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:11,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:11,268 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:11,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:11,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1093571635, now seen corresponding path program 1 times [2021-11-20 05:44:11,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:11,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188519035] [2021-11-20 05:44:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:11,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 05:44:11,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:11,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188519035] [2021-11-20 05:44:11,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188519035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:11,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350983850] [2021-11-20 05:44:11,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:11,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:11,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:44:11,346 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:44:11,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:44:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:11,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 05:44:11,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:11,468 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 11 treesize of output 7 [2021-11-20 05:44:11,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 05:44:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:44:11,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:44:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:44:11,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350983850] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:11,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:44:11,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2021-11-20 05:44:11,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179873269] [2021-11-20 05:44:11,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:44:11,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:44:11,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:11,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:44:11,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:44:11,866 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:12,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:12,031 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2021-11-20 05:44:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:44:12,032 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-20 05:44:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:12,034 INFO L225 Difference]: With dead ends: 61 [2021-11-20 05:44:12,035 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 05:44:12,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:44:12,036 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:12,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 108 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:44:12,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 05:44:12,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-20 05:44:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2021-11-20 05:44:12,050 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 24 [2021-11-20 05:44:12,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:12,050 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2021-11-20 05:44:12,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2021-11-20 05:44:12,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 05:44:12,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:12,053 INFO L514 BasicCegarLoop]: trace histogram [2, 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 05:44:12,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:12,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:12,276 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:12,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:12,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1875229501, now seen corresponding path program 1 times [2021-11-20 05:44:12,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:12,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558429972] [2021-11-20 05:44:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:12,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:44:12,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:12,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558429972] [2021-11-20 05:44:12,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558429972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:12,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650210603] [2021-11-20 05:44:12,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:12,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:12,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:44:12,385 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:44:12,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:44:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:12,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 05:44:12,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:12,470 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 11 treesize of output 7 [2021-11-20 05:44:12,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-20 05:44:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:44:12,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:44:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 05:44:12,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650210603] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:12,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:44:12,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2021-11-20 05:44:12,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239297310] [2021-11-20 05:44:12,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:44:12,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:44:12,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:12,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:44:12,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:44:12,844 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:12,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:12,990 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2021-11-20 05:44:12,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:44:12,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-20 05:44:12,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:12,992 INFO L225 Difference]: With dead ends: 66 [2021-11-20 05:44:12,992 INFO L226 Difference]: Without dead ends: 62 [2021-11-20 05:44:12,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:44:12,993 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:12,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 65 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:44:12,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-20 05:44:13,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2021-11-20 05:44:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2021-11-20 05:44:13,001 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 25 [2021-11-20 05:44:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:13,002 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2021-11-20 05:44:13,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2021-11-20 05:44:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 05:44:13,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:13,004 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:44:13,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:13,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 05:44:13,227 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1536847246, now seen corresponding path program 1 times [2021-11-20 05:44:13,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:13,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28116288] [2021-11-20 05:44:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:13,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:44:13,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:13,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28116288] [2021-11-20 05:44:13,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28116288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:13,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666924254] [2021-11-20 05:44:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:13,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:13,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:44:13,299 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:44:13,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:44:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:13,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:44:13,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:44:13,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:44:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:44:13,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666924254] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:44:13,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:44:13,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 8 [2021-11-20 05:44:13,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51975223] [2021-11-20 05:44:13,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:44:13,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:44:13,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:13,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:44:13,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:44:13,484 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:13,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:13,713 INFO L93 Difference]: Finished difference Result 220 states and 289 transitions. [2021-11-20 05:44:13,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 05:44:13,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-20 05:44:13,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:13,717 INFO L225 Difference]: With dead ends: 220 [2021-11-20 05:44:13,717 INFO L226 Difference]: Without dead ends: 183 [2021-11-20 05:44:13,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:44:13,719 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 228 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:13,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 169 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:44:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-20 05:44:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 48. [2021-11-20 05:44:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-11-20 05:44:13,731 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 26 [2021-11-20 05:44:13,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:13,731 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-11-20 05:44:13,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:13,731 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-11-20 05:44:13,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 05:44:13,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:13,732 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:44:13,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:13,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 05:44:13,953 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:13,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:13,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1845688875, now seen corresponding path program 2 times [2021-11-20 05:44:13,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:13,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597477370] [2021-11-20 05:44:13,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:13,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:14,053 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 05:44:14,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:14,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597477370] [2021-11-20 05:44:14,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597477370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:14,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650470492] [2021-11-20 05:44:14,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:44:14,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:14,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:44:14,056 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:44:14,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:44:14,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:44:14,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:44:14,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 05:44:14,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:14,205 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 05:44:14,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:44:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:44:14,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650470492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:44:14,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:44:14,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 10 [2021-11-20 05:44:14,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219111448] [2021-11-20 05:44:14,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:44:14,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:44:14,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:14,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:44:14,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:44:14,314 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:15,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:15,021 INFO L93 Difference]: Finished difference Result 390 states and 517 transitions. [2021-11-20 05:44:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 05:44:15,022 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-20 05:44:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:15,024 INFO L225 Difference]: With dead ends: 390 [2021-11-20 05:44:15,024 INFO L226 Difference]: Without dead ends: 349 [2021-11-20 05:44:15,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-11-20 05:44:15,026 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 634 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:15,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 277 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:44:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-20 05:44:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 52. [2021-11-20 05:44:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2021-11-20 05:44:15,040 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 30 [2021-11-20 05:44:15,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:15,040 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2021-11-20 05:44:15,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:15,040 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2021-11-20 05:44:15,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 05:44:15,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:15,042 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:44:15,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:15,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:15,267 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:15,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:15,268 INFO L85 PathProgramCache]: Analyzing trace with hash -926448804, now seen corresponding path program 1 times [2021-11-20 05:44:15,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:15,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445380516] [2021-11-20 05:44:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:15,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:44:15,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:15,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445380516] [2021-11-20 05:44:15,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445380516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:15,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595368067] [2021-11-20 05:44:15,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:15,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:15,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:44:15,355 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:44:15,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:44:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:15,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:44:15,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:15,480 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 05:44:15,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:44:15,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595368067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:44:15,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:44:15,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-20 05:44:15,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770399922] [2021-11-20 05:44:15,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:44:15,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:44:15,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:15,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:44:15,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:44:15,483 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:15,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:15,507 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2021-11-20 05:44:15,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:44:15,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-20 05:44:15,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:15,508 INFO L225 Difference]: With dead ends: 94 [2021-11-20 05:44:15,508 INFO L226 Difference]: Without dead ends: 64 [2021-11-20 05:44:15,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:44:15,510 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:15,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:44:15,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-20 05:44:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-11-20 05:44:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:15,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-11-20 05:44:15,520 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 33 [2021-11-20 05:44:15,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:15,520 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-11-20 05:44:15,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:15,521 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-11-20 05:44:15,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 05:44:15,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:15,522 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:44:15,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:15,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 05:44:15,736 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:15,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1399324024, now seen corresponding path program 3 times [2021-11-20 05:44:15,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:15,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235434022] [2021-11-20 05:44:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:15,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:44:15,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:15,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235434022] [2021-11-20 05:44:15,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235434022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:15,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816620151] [2021-11-20 05:44:15,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:44:15,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:15,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:44:15,806 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:44:15,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:44:15,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 05:44:15,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:44:15,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 05:44:15,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:16,206 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-20 05:44:16,206 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 23 treesize of output 16 [2021-11-20 05:44:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:44:16,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:44:16,433 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:44:16,434 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 26 treesize of output 1 [2021-11-20 05:44:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 05:44:16,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816620151] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:16,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:44:16,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 10] total 19 [2021-11-20 05:44:16,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215191131] [2021-11-20 05:44:16,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:44:16,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:44:16,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:16,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:44:16,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:44:16,473 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:16,597 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2021-11-20 05:44:16,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:44:16,598 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-20 05:44:16,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:16,599 INFO L225 Difference]: With dead ends: 90 [2021-11-20 05:44:16,599 INFO L226 Difference]: Without dead ends: 69 [2021-11-20 05:44:16,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-11-20 05:44:16,601 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:16,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 79 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:44:16,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-20 05:44:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2021-11-20 05:44:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:16,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-11-20 05:44:16,610 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 34 [2021-11-20 05:44:16,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:16,611 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-11-20 05:44:16,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:16,612 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-11-20 05:44:16,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 05:44:16,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:16,615 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:44:16,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:16,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:16,844 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:16,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:16,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1076823445, now seen corresponding path program 1 times [2021-11-20 05:44:16,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:16,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903159552] [2021-11-20 05:44:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:16,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:44:16,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:16,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903159552] [2021-11-20 05:44:16,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903159552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:16,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922362810] [2021-11-20 05:44:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:16,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:16,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:44:16,915 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:44:16,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:44:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:16,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 05:44:16,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:44:17,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:44:17,283 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 05:44:17,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922362810] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:44:17,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:44:17,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 15 [2021-11-20 05:44:17,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889741302] [2021-11-20 05:44:17,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:44:17,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 05:44:17,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:17,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 05:44:17,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:44:17,286 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:18,210 INFO L93 Difference]: Finished difference Result 432 states and 552 transitions. [2021-11-20 05:44:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 05:44:18,211 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-20 05:44:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:18,214 INFO L225 Difference]: With dead ends: 432 [2021-11-20 05:44:18,214 INFO L226 Difference]: Without dead ends: 382 [2021-11-20 05:44:18,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 05:44:18,216 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 459 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:18,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 926 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:44:18,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-20 05:44:18,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 69. [2021-11-20 05:44:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:18,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2021-11-20 05:44:18,232 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 36 [2021-11-20 05:44:18,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:18,233 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2021-11-20 05:44:18,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2021-11-20 05:44:18,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 05:44:18,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:18,234 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:44:18,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:18,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 05:44:18,455 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:18,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:18,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1408390255, now seen corresponding path program 1 times [2021-11-20 05:44:18,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:18,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682494226] [2021-11-20 05:44:18,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:18,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:44:18,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:18,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682494226] [2021-11-20 05:44:18,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682494226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:18,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293512427] [2021-11-20 05:44:18,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:18,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:18,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:44:18,542 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:44:18,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:44:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:18,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 05:44:18,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:18,969 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 05:44:18,969 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 26 treesize of output 10 [2021-11-20 05:44:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 05:44:18,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:44:19,331 INFO L354 Elim1Store]: treesize reduction 37, result has 75.5 percent of original size [2021-11-20 05:44:19,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 138 [2021-11-20 05:44:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 05:44:19,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293512427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:44:19,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:44:19,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 21 [2021-11-20 05:44:19,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454394412] [2021-11-20 05:44:19,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:44:19,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 05:44:19,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:19,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 05:44:19,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-11-20 05:44:19,724 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:21,145 INFO L93 Difference]: Finished difference Result 549 states and 725 transitions. [2021-11-20 05:44:21,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 05:44:21,146 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-20 05:44:21,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:21,150 INFO L225 Difference]: With dead ends: 549 [2021-11-20 05:44:21,150 INFO L226 Difference]: Without dead ends: 491 [2021-11-20 05:44:21,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 05:44:21,152 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 610 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:21,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 562 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:44:21,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-11-20 05:44:21,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 95. [2021-11-20 05:44:21,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 94 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2021-11-20 05:44:21,176 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 38 [2021-11-20 05:44:21,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:21,176 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2021-11-20 05:44:21,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2021-11-20 05:44:21,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 05:44:21,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:21,181 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:44:21,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:21,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:21,407 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:21,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:21,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1678328275, now seen corresponding path program 1 times [2021-11-20 05:44:21,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:21,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493215161] [2021-11-20 05:44:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:21,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 05:44:21,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:21,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493215161] [2021-11-20 05:44:21,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493215161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:21,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173188208] [2021-11-20 05:44:21,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:21,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:21,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:44:21,491 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:44:21,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 05:44:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:21,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 05:44:21,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:21,893 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 05:44:21,893 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 27 treesize of output 15 [2021-11-20 05:44:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 05:44:21,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:44:22,254 INFO L354 Elim1Store]: treesize reduction 44, result has 70.9 percent of original size [2021-11-20 05:44:22,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 135 [2021-11-20 05:44:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:44:22,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173188208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:44:22,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:44:22,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 9] total 18 [2021-11-20 05:44:22,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184039705] [2021-11-20 05:44:22,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:44:22,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 05:44:22,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:22,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 05:44:22,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:44:22,643 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:23,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:23,266 INFO L93 Difference]: Finished difference Result 313 states and 431 transitions. [2021-11-20 05:44:23,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 05:44:23,267 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-20 05:44:23,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:23,268 INFO L225 Difference]: With dead ends: 313 [2021-11-20 05:44:23,269 INFO L226 Difference]: Without dead ends: 241 [2021-11-20 05:44:23,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2021-11-20 05:44:23,270 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 213 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:23,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 274 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:44:23,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-20 05:44:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 127. [2021-11-20 05:44:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.2698412698412698) internal successors, (160), 126 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 160 transitions. [2021-11-20 05:44:23,300 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 160 transitions. Word has length 40 [2021-11-20 05:44:23,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:23,300 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 160 transitions. [2021-11-20 05:44:23,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 160 transitions. [2021-11-20 05:44:23,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 05:44:23,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:23,301 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-20 05:44:23,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:23,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 05:44:23,515 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:23,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:23,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1208431142, now seen corresponding path program 2 times [2021-11-20 05:44:23,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:23,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355368869] [2021-11-20 05:44:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:23,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:44:23,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:23,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355368869] [2021-11-20 05:44:23,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355368869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:23,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933144055] [2021-11-20 05:44:23,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:44:23,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:23,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:44:23,725 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:44:23,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 05:44:23,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:44:23,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:44:23,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 05:44:23,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:44:24,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:44:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:44:24,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933144055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:44:24,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:44:24,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 20 [2021-11-20 05:44:24,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373808780] [2021-11-20 05:44:24,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:44:24,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 05:44:24,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:24,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 05:44:24,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:44:24,289 INFO L87 Difference]: Start difference. First operand 127 states and 160 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:25,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:25,505 INFO L93 Difference]: Finished difference Result 537 states and 691 transitions. [2021-11-20 05:44:25,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 05:44:25,506 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-20 05:44:25,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:25,509 INFO L225 Difference]: With dead ends: 537 [2021-11-20 05:44:25,510 INFO L226 Difference]: Without dead ends: 531 [2021-11-20 05:44:25,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 05:44:25,512 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 503 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:25,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 1147 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 05:44:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-20 05:44:25,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 165. [2021-11-20 05:44:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.2804878048780488) internal successors, (210), 164 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 210 transitions. [2021-11-20 05:44:25,560 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 210 transitions. Word has length 46 [2021-11-20 05:44:25,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:25,561 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 210 transitions. [2021-11-20 05:44:25,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:25,561 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 210 transitions. [2021-11-20 05:44:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 05:44:25,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:25,562 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-20 05:44:25,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:25,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 05:44:25,775 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:25,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:25,776 INFO L85 PathProgramCache]: Analyzing trace with hash -528372772, now seen corresponding path program 1 times [2021-11-20 05:44:25,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:25,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383128223] [2021-11-20 05:44:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:25,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 05:44:26,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:26,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383128223] [2021-11-20 05:44:26,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383128223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:26,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105707332] [2021-11-20 05:44:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:26,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:26,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:44:26,824 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:44:26,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 05:44:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:26,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 05:44:26,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:31,213 INFO L354 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2021-11-20 05:44:31,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 193 treesize of output 249 [2021-11-20 05:44:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 05:44:32,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:44:36,251 INFO L354 Elim1Store]: treesize reduction 482, result has 0.2 percent of original size [2021-11-20 05:44:36,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 224 treesize of output 1 [2021-11-20 05:44:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:44:36,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105707332] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:44:36,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:44:36,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 13] total 31 [2021-11-20 05:44:36,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970164075] [2021-11-20 05:44:36,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:44:36,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 05:44:36,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:36,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 05:44:36,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-11-20 05:44:36,290 INFO L87 Difference]: Start difference. First operand 165 states and 210 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:38,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:38,207 INFO L93 Difference]: Finished difference Result 311 states and 402 transitions. [2021-11-20 05:44:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 05:44:38,208 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-20 05:44:38,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:38,210 INFO L225 Difference]: With dead ends: 311 [2021-11-20 05:44:38,210 INFO L226 Difference]: Without dead ends: 249 [2021-11-20 05:44:38,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 05:44:38,212 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:38,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 250 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 369 Invalid, 0 Unknown, 272 Unchecked, 0.4s Time] [2021-11-20 05:44:38,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-20 05:44:38,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 240. [2021-11-20 05:44:38,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.288702928870293) internal successors, (308), 239 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 308 transitions. [2021-11-20 05:44:38,273 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 308 transitions. Word has length 46 [2021-11-20 05:44:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:38,273 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 308 transitions. [2021-11-20 05:44:38,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:38,274 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 308 transitions. [2021-11-20 05:44:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 05:44:38,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:38,275 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-20 05:44:38,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:38,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 05:44:38,503 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:38,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:38,504 INFO L85 PathProgramCache]: Analyzing trace with hash -785729316, now seen corresponding path program 1 times [2021-11-20 05:44:38,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:38,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360569619] [2021-11-20 05:44:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:38,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 05:44:40,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:40,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360569619] [2021-11-20 05:44:40,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360569619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:40,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418638406] [2021-11-20 05:44:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:40,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:40,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:44:40,620 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:44:40,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 05:44:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:40,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-20 05:44:40,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:45,305 INFO L354 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2021-11-20 05:44:45,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2021-11-20 05:44:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 05:44:48,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:44:50,680 INFO L354 Elim1Store]: treesize reduction 482, result has 0.2 percent of original size [2021-11-20 05:44:50,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 224 treesize of output 1 [2021-11-20 05:44:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:44:50,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418638406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:44:50,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:44:50,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 12] total 39 [2021-11-20 05:44:50,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135338106] [2021-11-20 05:44:50,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:44:50,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 05:44:50,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:50,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 05:44:50,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 05:44:50,708 INFO L87 Difference]: Start difference. First operand 240 states and 308 transitions. Second operand has 39 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:59,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:59,489 INFO L93 Difference]: Finished difference Result 498 states and 637 transitions. [2021-11-20 05:44:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-20 05:44:59,490 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-20 05:44:59,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:59,493 INFO L225 Difference]: With dead ends: 498 [2021-11-20 05:44:59,493 INFO L226 Difference]: Without dead ends: 474 [2021-11-20 05:44:59,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=864, Invalid=4836, Unknown=0, NotChecked=0, Total=5700 [2021-11-20 05:44:59,497 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 110 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:59,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 211 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 285 Invalid, 0 Unknown, 414 Unchecked, 0.2s Time] [2021-11-20 05:44:59,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-20 05:44:59,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 297. [2021-11-20 05:44:59,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.2804054054054055) internal successors, (379), 296 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 379 transitions. [2021-11-20 05:44:59,553 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 379 transitions. Word has length 46 [2021-11-20 05:44:59,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:59,554 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 379 transitions. [2021-11-20 05:44:59,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:59,554 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 379 transitions. [2021-11-20 05:44:59,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 05:44:59,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:59,555 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-20 05:44:59,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:59,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 05:44:59,771 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:44:59,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:59,772 INFO L85 PathProgramCache]: Analyzing trace with hash -404220840, now seen corresponding path program 1 times [2021-11-20 05:44:59,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:59,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694749485] [2021-11-20 05:44:59,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:59,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:45:01,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:45:01,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694749485] [2021-11-20 05:45:01,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694749485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:45:01,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108432420] [2021-11-20 05:45:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:01,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:01,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:45:01,185 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:45:01,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 05:45:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:01,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-20 05:45:01,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:45:01,706 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-20 05:45:01,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 19 [2021-11-20 05:45:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:45:01,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:45:02,272 INFO L354 Elim1Store]: treesize reduction 41, result has 75.4 percent of original size [2021-11-20 05:45:02,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 150 [2021-11-20 05:45:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:45:02,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108432420] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:45:02,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:45:02,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 12] total 29 [2021-11-20 05:45:02,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685820546] [2021-11-20 05:45:02,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:45:02,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 05:45:02,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:45:02,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 05:45:02,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-11-20 05:45:02,559 INFO L87 Difference]: Start difference. First operand 297 states and 379 transitions. Second operand has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:11,498 WARN L227 SmtUtils]: Spent 6.71s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:45:14,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:45:14,727 INFO L93 Difference]: Finished difference Result 1043 states and 1353 transitions. [2021-11-20 05:45:14,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 05:45:14,728 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-20 05:45:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:45:14,732 INFO L225 Difference]: With dead ends: 1043 [2021-11-20 05:45:14,733 INFO L226 Difference]: Without dead ends: 774 [2021-11-20 05:45:14,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=764, Invalid=2654, Unknown=4, NotChecked=0, Total=3422 [2021-11-20 05:45:14,735 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 305 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:45:14,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 355 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 584 Invalid, 0 Unknown, 189 Unchecked, 0.6s Time] [2021-11-20 05:45:14,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-11-20 05:45:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 396. [2021-11-20 05:45:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.2886075949367088) internal successors, (509), 395 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 509 transitions. [2021-11-20 05:45:14,852 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 509 transitions. Word has length 46 [2021-11-20 05:45:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:45:14,852 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 509 transitions. [2021-11-20 05:45:14,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 509 transitions. [2021-11-20 05:45:14,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 05:45:14,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:45:14,854 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:45:14,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 05:45:15,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 05:45:15,067 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:45:15,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:45:15,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1604756109, now seen corresponding path program 1 times [2021-11-20 05:45:15,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:45:15,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068539316] [2021-11-20 05:45:15,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:15,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:45:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 05:45:15,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:45:15,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068539316] [2021-11-20 05:45:15,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068539316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:45:15,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649170062] [2021-11-20 05:45:15,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:15,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:15,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:45:15,176 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:45:15,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 05:45:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:15,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 05:45:15,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:45:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:45:15,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:45:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 05:45:15,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649170062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:45:15,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:45:15,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 11] total 23 [2021-11-20 05:45:15,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817934429] [2021-11-20 05:45:15,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:45:15,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 05:45:15,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:45:15,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 05:45:15,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:45:15,778 INFO L87 Difference]: Start difference. First operand 396 states and 509 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:45:22,933 INFO L93 Difference]: Finished difference Result 3329 states and 4496 transitions. [2021-11-20 05:45:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-11-20 05:45:22,933 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-20 05:45:22,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:45:22,950 INFO L225 Difference]: With dead ends: 3329 [2021-11-20 05:45:22,950 INFO L226 Difference]: Without dead ends: 2993 [2021-11-20 05:45:22,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5587 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2039, Invalid=12241, Unknown=0, NotChecked=0, Total=14280 [2021-11-20 05:45:22,956 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 1647 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:45:22,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1647 Valid, 785 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 05:45:22,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2021-11-20 05:45:23,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 877. [2021-11-20 05:45:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 1.2716894977168949) internal successors, (1114), 876 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1114 transitions. [2021-11-20 05:45:23,203 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1114 transitions. Word has length 48 [2021-11-20 05:45:23,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:45:23,203 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 1114 transitions. [2021-11-20 05:45:23,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:23,204 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1114 transitions. [2021-11-20 05:45:23,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 05:45:23,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:45:23,206 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:45:23,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 05:45:23,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:23,419 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:45:23,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:45:23,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1403496468, now seen corresponding path program 1 times [2021-11-20 05:45:23,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:45:23,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320778490] [2021-11-20 05:45:23,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:23,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:45:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 05:45:24,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:45:24,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320778490] [2021-11-20 05:45:24,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320778490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:45:24,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231115103] [2021-11-20 05:45:24,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:24,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:24,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:45:24,746 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:45:24,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 05:45:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:24,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-20 05:45:24,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:45:36,262 INFO L354 Elim1Store]: treesize reduction 428, result has 38.9 percent of original size [2021-11-20 05:45:36,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 239 treesize of output 376 [2021-11-20 05:45:39,104 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| already exists [2021-11-20 05:45:39,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:45:39,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-20 05:45:39,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134314722] [2021-11-20 05:45:39,105 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 05:45:39,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 05:45:39,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:45:39,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 05:45:39,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-11-20 05:45:39,107 INFO L87 Difference]: Start difference. First operand 877 states and 1114 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:40,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:45:40,681 INFO L93 Difference]: Finished difference Result 1646 states and 2101 transitions. [2021-11-20 05:45:40,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 05:45:40,682 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-20 05:45:40,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:45:40,687 INFO L225 Difference]: With dead ends: 1646 [2021-11-20 05:45:40,687 INFO L226 Difference]: Without dead ends: 1324 [2021-11-20 05:45:40,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 05:45:40,688 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 65 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:45:40,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 179 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:45:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-11-20 05:45:40,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1217. [2021-11-20 05:45:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 1.2672697368421053) internal successors, (1541), 1216 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:40,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1541 transitions. [2021-11-20 05:45:40,998 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1541 transitions. Word has length 56 [2021-11-20 05:45:40,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:45:40,998 INFO L470 AbstractCegarLoop]: Abstraction has 1217 states and 1541 transitions. [2021-11-20 05:45:40,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:40,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1541 transitions. [2021-11-20 05:45:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 05:45:41,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:45:41,001 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:45:41,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 05:45:41,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:41,215 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:45:41,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:45:41,216 INFO L85 PathProgramCache]: Analyzing trace with hash -723438098, now seen corresponding path program 2 times [2021-11-20 05:45:41,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:45:41,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396201031] [2021-11-20 05:45:41,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:41,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:45:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 05:45:41,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:45:41,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396201031] [2021-11-20 05:45:41,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396201031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:45:41,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277119628] [2021-11-20 05:45:41,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:45:41,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:41,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:45:41,970 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:45:41,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 05:45:42,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:45:42,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:45:42,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 05:45:42,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:45:42,753 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 05:45:42,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 17 [2021-11-20 05:45:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 05:45:42,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:45:44,789 INFO L354 Elim1Store]: treesize reduction 94, result has 31.4 percent of original size [2021-11-20 05:45:44,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 75 [2021-11-20 05:45:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 05:45:44,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277119628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:45:44,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:45:44,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 16] total 42 [2021-11-20 05:45:44,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037342890] [2021-11-20 05:45:44,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:45:44,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-20 05:45:44,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:45:44,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-20 05:45:44,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1458, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 05:45:44,918 INFO L87 Difference]: Start difference. First operand 1217 states and 1541 transitions. Second operand has 42 states, 42 states have (on average 2.7142857142857144) internal successors, (114), 42 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:46,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:45:46,429 INFO L93 Difference]: Finished difference Result 1243 states and 1566 transitions. [2021-11-20 05:45:46,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 05:45:46,429 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.7142857142857144) internal successors, (114), 42 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-20 05:45:46,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:45:46,434 INFO L225 Difference]: With dead ends: 1243 [2021-11-20 05:45:46,434 INFO L226 Difference]: Without dead ends: 1085 [2021-11-20 05:45:46,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=734, Invalid=3298, Unknown=0, NotChecked=0, Total=4032 [2021-11-20 05:45:46,437 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 167 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:45:46,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 293 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 442 Invalid, 0 Unknown, 184 Unchecked, 0.3s Time] [2021-11-20 05:45:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-11-20 05:45:46,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1069. [2021-11-20 05:45:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 1.2715355805243447) internal successors, (1358), 1068 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:46,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1358 transitions. [2021-11-20 05:45:46,767 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1358 transitions. Word has length 56 [2021-11-20 05:45:46,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:45:46,767 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 1358 transitions. [2021-11-20 05:45:46,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.7142857142857144) internal successors, (114), 42 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:46,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1358 transitions. [2021-11-20 05:45:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 05:45:46,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:45:46,770 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 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] [2021-11-20 05:45:46,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 05:45:46,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:46,987 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:45:46,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:45:46,988 INFO L85 PathProgramCache]: Analyzing trace with hash 314647135, now seen corresponding path program 2 times [2021-11-20 05:45:46,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:45:46,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777856454] [2021-11-20 05:45:46,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:46,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:45:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 05:45:47,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:45:47,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777856454] [2021-11-20 05:45:47,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777856454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:45:47,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113811219] [2021-11-20 05:45:47,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:45:47,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:47,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:45:47,187 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:45:47,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 05:45:47,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:45:47,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:45:47,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 05:45:47,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:45:47,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:45:47,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 05:45:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 05:45:47,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:45:49,203 INFO L354 Elim1Store]: treesize reduction 50, result has 70.1 percent of original size [2021-11-20 05:45:49,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 140 [2021-11-20 05:45:49,660 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-20 05:45:49,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113811219] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:45:49,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:45:49,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2021-11-20 05:45:49,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126897112] [2021-11-20 05:45:49,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:45:49,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 05:45:49,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:45:49,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 05:45:49,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=810, Unknown=1, NotChecked=0, Total=930 [2021-11-20 05:45:49,662 INFO L87 Difference]: Start difference. First operand 1069 states and 1358 transitions. Second operand has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 31 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:46:15,266 WARN L227 SmtUtils]: Spent 24.63s on a formula simplification. DAG size of input: 69 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:46:28,842 WARN L227 SmtUtils]: Spent 13.54s on a formula simplification. DAG size of input: 69 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:46:45,968 WARN L227 SmtUtils]: Spent 16.88s on a formula simplification. DAG size of input: 70 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:46:55,769 WARN L227 SmtUtils]: Spent 9.76s on a formula simplification. DAG size of input: 70 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:47:22,840 WARN L227 SmtUtils]: Spent 24.29s on a formula simplification. DAG size of input: 70 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:47:36,951 WARN L227 SmtUtils]: Spent 14.07s on a formula simplification. DAG size of input: 70 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:47:48,197 WARN L227 SmtUtils]: Spent 10.78s on a formula simplification. DAG size of input: 58 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:47:57,871 WARN L227 SmtUtils]: Spent 7.59s on a formula simplification. DAG size of input: 53 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:48:03,214 WARN L227 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 53 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:48:22,867 WARN L227 SmtUtils]: Spent 19.36s on a formula simplification. DAG size of input: 66 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:48:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:23,577 INFO L93 Difference]: Finished difference Result 1387 states and 1762 transitions. [2021-11-20 05:48:23,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-20 05:48:23,578 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 31 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-20 05:48:23,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:23,582 INFO L225 Difference]: With dead ends: 1387 [2021-11-20 05:48:23,582 INFO L226 Difference]: Without dead ends: 1304 [2021-11-20 05:48:23,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2480 ImplicationChecksByTransitivity, 154.3s TimeCoverageRelationStatistics Valid=990, Invalid=7747, Unknown=5, NotChecked=0, Total=8742 [2021-11-20 05:48:23,586 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 280 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:23,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 656 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1189 Invalid, 0 Unknown, 181 Unchecked, 0.7s Time] [2021-11-20 05:48:23,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-11-20 05:48:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1088. [2021-11-20 05:48:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 1.2695492180312788) internal successors, (1380), 1087 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:23,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1380 transitions. [2021-11-20 05:48:23,891 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1380 transitions. Word has length 56 [2021-11-20 05:48:23,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:23,892 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1380 transitions. [2021-11-20 05:48:23,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 31 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:23,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1380 transitions. [2021-11-20 05:48:23,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 05:48:23,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:23,895 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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] [2021-11-20 05:48:23,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:24,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 05:48:24,107 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:48:24,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:24,108 INFO L85 PathProgramCache]: Analyzing trace with hash -41484349, now seen corresponding path program 3 times [2021-11-20 05:48:24,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:24,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469833383] [2021-11-20 05:48:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:24,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-20 05:48:24,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:24,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469833383] [2021-11-20 05:48:24,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469833383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:24,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254832647] [2021-11-20 05:48:24,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:48:24,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:24,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:24,565 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:24,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 05:48:24,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 05:48:24,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:24,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 05:48:24,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:24,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-20 05:48:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-20 05:48:24,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:25,237 INFO L354 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2021-11-20 05:48:25,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 34 [2021-11-20 05:48:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-20 05:48:25,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254832647] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:25,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:25,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2021-11-20 05:48:25,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056793572] [2021-11-20 05:48:25,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:25,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 05:48:25,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:25,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 05:48:25,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:48:25,291 INFO L87 Difference]: Start difference. First operand 1088 states and 1380 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:25,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:25,729 INFO L93 Difference]: Finished difference Result 1349 states and 1725 transitions. [2021-11-20 05:48:25,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:48:25,731 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-20 05:48:25,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:25,737 INFO L225 Difference]: With dead ends: 1349 [2021-11-20 05:48:25,737 INFO L226 Difference]: Without dead ends: 1345 [2021-11-20 05:48:25,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:48:25,739 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 110 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:25,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 229 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 190 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2021-11-20 05:48:25,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-11-20 05:48:26,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1106. [2021-11-20 05:48:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1105 states have (on average 1.2597285067873303) internal successors, (1392), 1105 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1392 transitions. [2021-11-20 05:48:26,045 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1392 transitions. Word has length 57 [2021-11-20 05:48:26,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:26,045 INFO L470 AbstractCegarLoop]: Abstraction has 1106 states and 1392 transitions. [2021-11-20 05:48:26,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1392 transitions. [2021-11-20 05:48:26,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:48:26,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:26,051 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2021-11-20 05:48:26,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:26,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:26,267 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:48:26,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:26,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1786130607, now seen corresponding path program 4 times [2021-11-20 05:48:26,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:26,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717454714] [2021-11-20 05:48:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:26,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 05:48:28,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:28,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717454714] [2021-11-20 05:48:28,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717454714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:28,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437467218] [2021-11-20 05:48:28,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:48:28,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:28,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:28,106 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:28,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 05:48:28,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:48:28,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:28,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-20 05:48:28,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:28,862 INFO L354 Elim1Store]: treesize reduction 85, result has 7.6 percent of original size [2021-11-20 05:48:28,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 32 [2021-11-20 05:48:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 05:48:28,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:29,367 INFO L354 Elim1Store]: treesize reduction 41, result has 74.2 percent of original size [2021-11-20 05:48:29,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 142 [2021-11-20 05:48:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 23 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 05:48:29,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437467218] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:29,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:29,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 12] total 35 [2021-11-20 05:48:29,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254799010] [2021-11-20 05:48:29,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:29,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 05:48:29,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:29,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 05:48:29,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 05:48:29,708 INFO L87 Difference]: Start difference. First operand 1106 states and 1392 transitions. Second operand has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:33,427 INFO L93 Difference]: Finished difference Result 2668 states and 3394 transitions. [2021-11-20 05:48:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-20 05:48:33,428 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 05:48:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:33,436 INFO L225 Difference]: With dead ends: 2668 [2021-11-20 05:48:33,436 INFO L226 Difference]: Without dead ends: 2239 [2021-11-20 05:48:33,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=889, Invalid=4963, Unknown=0, NotChecked=0, Total=5852 [2021-11-20 05:48:33,439 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 608 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:33,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 488 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 05:48:33,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2021-11-20 05:48:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 1498. [2021-11-20 05:48:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 1.2471609886439545) internal successors, (1867), 1497 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 1867 transitions. [2021-11-20 05:48:33,925 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 1867 transitions. Word has length 67 [2021-11-20 05:48:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:33,925 INFO L470 AbstractCegarLoop]: Abstraction has 1498 states and 1867 transitions. [2021-11-20 05:48:33,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:33,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 1867 transitions. [2021-11-20 05:48:33,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:48:33,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:33,929 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2021-11-20 05:48:33,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:34,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 05:48:34,143 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:48:34,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:34,144 INFO L85 PathProgramCache]: Analyzing trace with hash -436746483, now seen corresponding path program 5 times [2021-11-20 05:48:34,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:34,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383006709] [2021-11-20 05:48:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:34,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:48:36,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:36,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383006709] [2021-11-20 05:48:36,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383006709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:36,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569254417] [2021-11-20 05:48:36,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:48:36,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:36,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:36,229 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:36,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 05:48:36,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 05:48:36,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:36,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-20 05:48:36,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:36,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 05:48:36,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 05:48:38,698 INFO L354 Elim1Store]: treesize reduction 118, result has 2.5 percent of original size [2021-11-20 05:48:38,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 46 [2021-11-20 05:48:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:48:38,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:41,601 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_aux_mod_ULTIMATE.start_main_~j~0#1_45_62| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:48:41,601 WARN L322 ript$VariableManager]: TermVariabe |aux_div_aux_mod_ULTIMATE.start_main_~j~0#1_45_62| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:48:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 05:48:53,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569254417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:53,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:53,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26, 23] total 62 [2021-11-20 05:48:53,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580302011] [2021-11-20 05:48:53,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:53,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-20 05:48:53,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:53,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-20 05:48:53,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=3266, Unknown=0, NotChecked=0, Total=3782 [2021-11-20 05:48:53,644 INFO L87 Difference]: Start difference. First operand 1498 states and 1867 transitions. Second operand has 62 states, 62 states have (on average 2.4193548387096775) internal successors, (150), 62 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:35,967 INFO L93 Difference]: Finished difference Result 2703 states and 3387 transitions. [2021-11-20 05:49:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-11-20 05:49:35,968 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.4193548387096775) internal successors, (150), 62 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 05:49:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:35,976 INFO L225 Difference]: With dead ends: 2703 [2021-11-20 05:49:35,976 INFO L226 Difference]: Without dead ends: 2355 [2021-11-20 05:49:35,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 113 SyntacticMatches, 8 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7416 ImplicationChecksByTransitivity, 45.4s TimeCoverageRelationStatistics Valid=2622, Invalid=18547, Unknown=1, NotChecked=0, Total=21170 [2021-11-20 05:49:35,979 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 335 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 2778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1866 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:35,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 740 Invalid, 2778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 835 Invalid, 0 Unknown, 1866 Unchecked, 0.6s Time] [2021-11-20 05:49:35,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-11-20 05:49:36,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1922. [2021-11-20 05:49:36,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1921 states have (on average 1.241540864133264) internal successors, (2385), 1921 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 2385 transitions. [2021-11-20 05:49:36,558 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 2385 transitions. Word has length 67 [2021-11-20 05:49:36,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:36,559 INFO L470 AbstractCegarLoop]: Abstraction has 1922 states and 2385 transitions. [2021-11-20 05:49:36,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.4193548387096775) internal successors, (150), 62 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:36,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 2385 transitions. [2021-11-20 05:49:36,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:49:36,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:36,564 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2021-11-20 05:49:36,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:36,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 05:49:36,791 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:49:36,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:36,792 INFO L85 PathProgramCache]: Analyzing trace with hash 6687953, now seen corresponding path program 6 times [2021-11-20 05:49:36,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:49:36,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076292032] [2021-11-20 05:49:36,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:36,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:49:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 05:49:38,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:49:38,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076292032] [2021-11-20 05:49:38,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076292032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:38,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827389887] [2021-11-20 05:49:38,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:49:38,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:49:38,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:49:38,776 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:49:38,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 05:49:38,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-20 05:49:38,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:49:38,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-20 05:49:38,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:38,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 05:49:39,033 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 23 treesize of output 22 [2021-11-20 05:49:39,087 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 21 treesize of output 20 [2021-11-20 05:49:39,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2021-11-20 05:49:39,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 38 treesize of output 26 [2021-11-20 05:49:39,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2021-11-20 05:49:39,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2021-11-20 05:49:39,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 34 treesize of output 21 [2021-11-20 05:49:39,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2021-11-20 05:49:39,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 38 treesize of output 26 [2021-11-20 05:49:39,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2021-11-20 05:49:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 54 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 05:49:41,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 27 proven. 36 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 05:49:43,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827389887] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:43,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:49:43,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25, 24] total 63 [2021-11-20 05:49:43,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275584396] [2021-11-20 05:49:43,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:43,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-20 05:49:43,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:49:43,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-20 05:49:43,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=3247, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 05:49:43,964 INFO L87 Difference]: Start difference. First operand 1922 states and 2385 transitions. Second operand has 63 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:38,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:38,353 INFO L93 Difference]: Finished difference Result 4470 states and 5683 transitions. [2021-11-20 05:50:38,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 314 states. [2021-11-20 05:50:38,354 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 05:50:38,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:38,367 INFO L225 Difference]: With dead ends: 4470 [2021-11-20 05:50:38,367 INFO L226 Difference]: Without dead ends: 3686 [2021-11-20 05:50:38,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48848 ImplicationChecksByTransitivity, 51.2s TimeCoverageRelationStatistics Valid=16015, Invalid=110365, Unknown=0, NotChecked=0, Total=126380 [2021-11-20 05:50:38,378 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 1544 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 3984 mSolverCounterSat, 961 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1544 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 4945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 961 IncrementalHoareTripleChecker+Valid, 3984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:38,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1544 Valid, 1437 Invalid, 4945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [961 Valid, 3984 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-20 05:50:38,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3686 states. [2021-11-20 05:50:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3686 to 1783. [2021-11-20 05:50:38,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 1.2255892255892256) internal successors, (2184), 1782 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:38,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2184 transitions. [2021-11-20 05:50:38,962 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2184 transitions. Word has length 67 [2021-11-20 05:50:38,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:38,962 INFO L470 AbstractCegarLoop]: Abstraction has 1783 states and 2184 transitions. [2021-11-20 05:50:38,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:38,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2184 transitions. [2021-11-20 05:50:38,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:50:38,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:38,967 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2021-11-20 05:50:38,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:39,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 05:50:39,171 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:50:39,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:39,171 INFO L85 PathProgramCache]: Analyzing trace with hash -415204979, now seen corresponding path program 7 times [2021-11-20 05:50:39,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:39,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205091525] [2021-11-20 05:50:39,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:39,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:50:41,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:50:41,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205091525] [2021-11-20 05:50:41,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205091525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:50:41,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034713343] [2021-11-20 05:50:41,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:50:41,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:41,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:50:41,354 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:50:41,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 05:50:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:41,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 05:50:41,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:42,250 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-11-20 05:50:42,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 24 [2021-11-20 05:50:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 60 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 05:50:42,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:50:46,077 INFO L354 Elim1Store]: treesize reduction 56, result has 68.0 percent of original size [2021-11-20 05:50:46,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 142 [2021-11-20 05:50:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 05:50:46,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034713343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:50:46,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:50:46,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 44 [2021-11-20 05:50:46,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666421429] [2021-11-20 05:50:46,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:50:46,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-20 05:50:46,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:50:46,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-20 05:50:46,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1633, Unknown=3, NotChecked=0, Total=1892 [2021-11-20 05:50:46,678 INFO L87 Difference]: Start difference. First operand 1783 states and 2184 transitions. Second operand has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:04,854 WARN L227 SmtUtils]: Spent 14.34s on a formula simplification. DAG size of input: 96 DAG size of output: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:51:23,605 WARN L227 SmtUtils]: Spent 9.67s on a formula simplification. DAG size of input: 93 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:51:40,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:40,833 INFO L93 Difference]: Finished difference Result 4445 states and 5627 transitions. [2021-11-20 05:51:40,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-20 05:51:40,834 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 05:51:40,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:40,847 INFO L225 Difference]: With dead ends: 4445 [2021-11-20 05:51:40,847 INFO L226 Difference]: Without dead ends: 3466 [2021-11-20 05:51:40,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 121 SyntacticMatches, 9 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4813 ImplicationChecksByTransitivity, 55.6s TimeCoverageRelationStatistics Valid=1954, Invalid=12304, Unknown=22, NotChecked=0, Total=14280 [2021-11-20 05:51:40,850 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 891 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:40,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 835 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 1464 Invalid, 0 Unknown, 332 Unchecked, 1.5s Time] [2021-11-20 05:51:40,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3466 states. [2021-11-20 05:51:41,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3466 to 2300. [2021-11-20 05:51:41,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 1.2235754675946064) internal successors, (2813), 2299 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:41,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 2813 transitions. [2021-11-20 05:51:41,636 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 2813 transitions. Word has length 67 [2021-11-20 05:51:41,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:41,636 INFO L470 AbstractCegarLoop]: Abstraction has 2300 states and 2813 transitions. [2021-11-20 05:51:41,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:41,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 2813 transitions. [2021-11-20 05:51:41,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:51:41,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:41,641 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:51:41,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:41,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 05:51:41,867 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:51:41,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:41,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1043741809, now seen corresponding path program 8 times [2021-11-20 05:51:41,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:51:41,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220322074] [2021-11-20 05:51:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:41,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:51:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 05:51:42,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:51:42,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220322074] [2021-11-20 05:51:42,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220322074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:51:42,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072909654] [2021-11-20 05:51:42,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:51:42,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:51:42,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:51:42,109 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:51:42,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 05:51:42,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:51:42,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:51:42,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 05:51:42,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:45,521 INFO L354 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2021-11-20 05:51:45,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2021-11-20 05:52:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 05:52:38,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:45,461 INFO L354 Elim1Store]: treesize reduction 482, result has 0.2 percent of original size [2021-11-20 05:52:45,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 221 treesize of output 1 [2021-11-20 05:52:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 05:52:45,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072909654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:45,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:52:45,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 14] total 35 [2021-11-20 05:52:45,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803051592] [2021-11-20 05:52:45,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:45,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 05:52:45,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:45,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 05:52:45,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 05:52:45,493 INFO L87 Difference]: Start difference. First operand 2300 states and 2813 transitions. Second operand has 35 states, 35 states have (on average 3.7714285714285714) internal successors, (132), 35 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:47,120 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-20 05:52:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:52:47,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=284, Invalid=1786, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 05:52:47,122 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:47,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 119 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 152 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2021-11-20 05:52:47,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-20 05:52:47,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:47,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:47,323 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:192) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:159) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 56 more [2021-11-20 05:52:47,327 INFO L158 Benchmark]: Toolchain (without parser) took 518926.26ms. Allocated memory was 92.3MB in the beginning and 453.0MB in the end (delta: 360.7MB). Free memory was 60.1MB in the beginning and 131.1MB in the end (delta: -71.0MB). Peak memory consumption was 290.5MB. Max. memory is 16.1GB. [2021-11-20 05:52:47,327 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 92.3MB. Free memory was 48.8MB in the beginning and 48.7MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:52:47,327 INFO L158 Benchmark]: CACSL2BoogieTranslator took 333.45ms. Allocated memory is still 92.3MB. Free memory was 59.9MB in the beginning and 67.7MB in the end (delta: -7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 05:52:47,328 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.19ms. Allocated memory is still 92.3MB. Free memory was 67.7MB in the beginning and 65.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 05:52:47,328 INFO L158 Benchmark]: Boogie Preprocessor took 61.31ms. Allocated memory is still 92.3MB. Free memory was 65.9MB in the beginning and 64.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:52:47,328 INFO L158 Benchmark]: RCFGBuilder took 469.19ms. Allocated memory is still 92.3MB. Free memory was 64.5MB in the beginning and 53.0MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 05:52:47,328 INFO L158 Benchmark]: TraceAbstraction took 518015.72ms. Allocated memory was 92.3MB in the beginning and 453.0MB in the end (delta: 360.7MB). Free memory was 52.4MB in the beginning and 131.1MB in the end (delta: -78.7MB). Peak memory consumption was 285.1MB. Max. memory is 16.1GB. [2021-11-20 05:52:47,329 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 92.3MB. Free memory was 48.8MB in the beginning and 48.7MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 333.45ms. Allocated memory is still 92.3MB. Free memory was 59.9MB in the beginning and 67.7MB in the end (delta: -7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.19ms. Allocated memory is still 92.3MB. Free memory was 67.7MB in the beginning and 65.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.31ms. Allocated memory is still 92.3MB. Free memory was 65.9MB in the beginning and 64.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 469.19ms. Allocated memory is still 92.3MB. Free memory was 64.5MB in the beginning and 53.0MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 518015.72ms. Allocated memory was 92.3MB in the beginning and 453.0MB in the end (delta: 360.7MB). Free memory was 52.4MB in the beginning and 131.1MB in the end (delta: -78.7MB). Peak memory consumption was 285.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/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_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/vogal-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/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 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:52:49,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:52:49,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:52:49,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:52:49,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:52:49,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:52:49,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:52:49,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:52:49,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:52:49,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:52:49,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:52:49,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:52:49,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:52:49,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:52:49,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:52:49,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:52:49,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:52:49,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:52:49,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:52:49,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:52:49,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:52:49,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:52:49,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:52:49,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:52:49,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:52:49,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:52:49,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:52:49,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:52:49,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:52:49,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:52:49,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:52:49,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:52:49,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:52:49,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:52:49,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:52:49,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:52:49,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:52:49,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:52:49,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:52:49,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:52:49,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:52:49,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-20 05:52:49,629 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:52:49,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:52:49,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:52:49,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:52:49,631 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:52:49,631 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:52:49,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:52:49,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:52:49,633 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:52:49,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:52:49,634 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:52:49,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:52:49,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:52:49,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:52:49,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:52:49,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:52:49,636 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 05:52:49,636 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 05:52:49,636 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 05:52:49,637 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:52:49,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:52:49,637 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:52:49,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:52:49,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:52:49,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:52:49,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:52:49,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:52:49,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:52:49,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:52:49,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:52:49,639 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 05:52:49,639 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 05:52:49,640 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:52:49,640 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:52:49,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:52:49,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:52:49,641 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 05:52:49,641 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_8887fcab-a14c-41a5-a48d-e7c2396d6255/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e [2021-11-20 05:52:50,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:52:50,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:52:50,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:52:50,094 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:52:50,095 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:52:50,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/loops/vogal-1.i [2021-11-20 05:52:50,185 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/data/0ab73fb56/df22f2b0ee4542f69eb45b530acefb48/FLAG04b7f3e65 [2021-11-20 05:52:50,769 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:52:50,770 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/sv-benchmarks/c/loops/vogal-1.i [2021-11-20 05:52:50,779 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/data/0ab73fb56/df22f2b0ee4542f69eb45b530acefb48/FLAG04b7f3e65 [2021-11-20 05:52:51,106 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/data/0ab73fb56/df22f2b0ee4542f69eb45b530acefb48 [2021-11-20 05:52:51,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:52:51,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:52:51,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:52:51,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:52:51,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:52:51,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:52:51" (1/1) ... [2021-11-20 05:52:51,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fcce46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:51, skipping insertion in model container [2021-11-20 05:52:51,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:52:51" (1/1) ... [2021-11-20 05:52:51,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:52:51,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:52:51,373 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_8887fcab-a14c-41a5-a48d-e7c2396d6255/sv-benchmarks/c/loops/vogal-1.i[895,908] [2021-11-20 05:52:51,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:52:51,436 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:52:51,464 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_8887fcab-a14c-41a5-a48d-e7c2396d6255/sv-benchmarks/c/loops/vogal-1.i[895,908] [2021-11-20 05:52:51,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:52:51,539 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:52:51,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:51 WrapperNode [2021-11-20 05:52:51,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:52:51,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:52:51,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:52:51,547 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:52:51,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:51" (1/1) ... [2021-11-20 05:52:51,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:51" (1/1) ... [2021-11-20 05:52:51,610 INFO L137 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 132 [2021-11-20 05:52:51,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:52:51,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:52:51,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:52:51,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:52:51,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:51" (1/1) ... [2021-11-20 05:52:51,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:51" (1/1) ... [2021-11-20 05:52:51,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:51" (1/1) ... [2021-11-20 05:52:51,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:51" (1/1) ... [2021-11-20 05:52:51,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:51" (1/1) ... [2021-11-20 05:52:51,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:51" (1/1) ... [2021-11-20 05:52:51,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:51" (1/1) ... [2021-11-20 05:52:51,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:52:51,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:52:51,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:52:51,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:52:51,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:51" (1/1) ... [2021-11-20 05:52:51,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:52:51,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:51,721 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:52:51,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:52:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:52:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-20 05:52:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 05:52:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:52:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:52:51,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:52:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-20 05:52:51,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:52:51,888 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:52:51,889 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:52:52,065 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:52:52,072 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:52:52,072 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-20 05:52:52,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:52:52 BoogieIcfgContainer [2021-11-20 05:52:52,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:52:52,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:52:52,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:52:52,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:52:52,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:52:51" (1/3) ... [2021-11-20 05:52:52,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dae6135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:52:52, skipping insertion in model container [2021-11-20 05:52:52,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:51" (2/3) ... [2021-11-20 05:52:52,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dae6135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:52:52, skipping insertion in model container [2021-11-20 05:52:52,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:52:52" (3/3) ... [2021-11-20 05:52:52,082 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2021-11-20 05:52:52,088 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:52:52,088 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:52:52,138 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:52:52,145 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 05:52:52,145 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:52:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:52,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 05:52:52,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:52,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:52,167 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:52,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash 388073842, now seen corresponding path program 1 times [2021-11-20 05:52:52,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:52:52,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800126799] [2021-11-20 05:52:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:52,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:52:52,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:52:52,216 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:52:52,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 05:52:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:52,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 05:52:52,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:52,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:52,486 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:52:52,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800126799] [2021-11-20 05:52:52,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800126799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:52,487 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:52,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 05:52:52,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527736995] [2021-11-20 05:52:52,490 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:52,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:52:52,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:52:52,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:52:52,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:52:52,536 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:52,552 INFO L93 Difference]: Finished difference Result 54 states and 82 transitions. [2021-11-20 05:52:52,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:52:52,555 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 05:52:52,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:52,562 INFO L225 Difference]: With dead ends: 54 [2021-11-20 05:52:52,563 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 05:52:52,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:52:52,569 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:52,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:52:52,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 05:52:52,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-20 05:52:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:52,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-11-20 05:52:52,603 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2021-11-20 05:52:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:52,604 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-11-20 05:52:52,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:52,604 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-11-20 05:52:52,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 05:52:52,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:52,605 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:52,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:52,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:52:52,809 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:52,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:52,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2016618829, now seen corresponding path program 1 times [2021-11-20 05:52:52,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:52:52,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451817815] [2021-11-20 05:52:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:52,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:52:52,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:52:52,819 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:52:52,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 05:52:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:52,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:52:52,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:52,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:53,001 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:52:53,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451817815] [2021-11-20 05:52:53,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451817815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:53,002 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:53,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 05:52:53,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413190007] [2021-11-20 05:52:53,002 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:53,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:53,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:52:53,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:53,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:53,005 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:53,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:53,103 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2021-11-20 05:52:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:53,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 05:52:53,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:53,106 INFO L225 Difference]: With dead ends: 81 [2021-11-20 05:52:53,106 INFO L226 Difference]: Without dead ends: 60 [2021-11-20 05:52:53,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:53,108 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 38 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:53,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 61 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:52:53,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-20 05:52:53,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 28. [2021-11-20 05:52:53,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:53,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-11-20 05:52:53,118 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2021-11-20 05:52:53,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:53,119 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-11-20 05:52:53,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:53,119 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-11-20 05:52:53,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 05:52:53,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:53,120 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:53,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:53,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:52:53,332 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:53,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:53,332 INFO L85 PathProgramCache]: Analyzing trace with hash 632663215, now seen corresponding path program 1 times [2021-11-20 05:52:53,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:52:53,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916652587] [2021-11-20 05:52:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:53,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:52:53,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:52:53,335 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:52:53,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 05:52:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:53,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:52:53,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:53,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:53,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:52:53,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916652587] [2021-11-20 05:52:53,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916652587] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:53,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:52:53,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 05:52:53,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528171254] [2021-11-20 05:52:53,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:53,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:52:53,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:52:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:52:53,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:52:53,552 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:53,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:53,879 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-11-20 05:52:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:52:53,882 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-20 05:52:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:53,885 INFO L225 Difference]: With dead ends: 135 [2021-11-20 05:52:53,885 INFO L226 Difference]: Without dead ends: 114 [2021-11-20 05:52:53,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:52:53,888 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 168 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:53,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 192 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:52:53,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-20 05:52:53,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 34. [2021-11-20 05:52:53,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:53,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-11-20 05:52:53,912 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 19 [2021-11-20 05:52:53,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:53,913 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-11-20 05:52:53,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-11-20 05:52:53,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 05:52:53,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:53,916 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:53,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-20 05:52:54,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:52:54,126 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:54,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2081377641, now seen corresponding path program 2 times [2021-11-20 05:52:54,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:52:54,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124738336] [2021-11-20 05:52:54,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:52:54,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:52:54,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:52:54,130 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:52:54,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 05:52:54,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 05:52:54,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:52:54,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:52:54,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 05:52:54,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 05:52:54,355 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:52:54,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124738336] [2021-11-20 05:52:54,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124738336] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:54,360 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:54,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-20 05:52:54,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142627575] [2021-11-20 05:52:54,361 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:54,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:52:54,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:52:54,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:52:54,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:52:54,363 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:54,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:54,422 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-11-20 05:52:54,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:52:54,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-20 05:52:54,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:54,429 INFO L225 Difference]: With dead ends: 60 [2021-11-20 05:52:54,430 INFO L226 Difference]: Without dead ends: 56 [2021-11-20 05:52:54,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:52:54,438 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:54,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 187 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:52:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-20 05:52:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-11-20 05:52:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2021-11-20 05:52:54,458 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 25 [2021-11-20 05:52:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:54,458 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2021-11-20 05:52:54,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2021-11-20 05:52:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 05:52:54,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:54,462 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:54,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:54,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:52:54,663 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:54,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:54,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1750893040, now seen corresponding path program 1 times [2021-11-20 05:52:54,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:52:54,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913344940] [2021-11-20 05:52:54,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:54,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:52:54,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:52:54,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:52:54,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 05:52:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:54,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:52:54,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 05:52:54,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 05:52:54,882 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:52:54,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913344940] [2021-11-20 05:52:54,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913344940] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:54,885 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:54,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 05:52:54,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936285653] [2021-11-20 05:52:54,888 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:54,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:52:54,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:52:54,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:52:54,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:52:54,891 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:54,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:54,914 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2021-11-20 05:52:54,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:52:54,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-20 05:52:54,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:54,916 INFO L225 Difference]: With dead ends: 95 [2021-11-20 05:52:54,916 INFO L226 Difference]: Without dead ends: 67 [2021-11-20 05:52:54,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 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 05:52:54,920 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:54,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 55 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:52:54,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-20 05:52:54,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2021-11-20 05:52:54,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:54,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2021-11-20 05:52:54,944 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 31 [2021-11-20 05:52:54,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:54,944 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2021-11-20 05:52:54,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:54,945 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2021-11-20 05:52:54,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 05:52:54,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:54,946 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:54,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:55,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:52:55,158 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:55,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:55,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1977384251, now seen corresponding path program 1 times [2021-11-20 05:52:55,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:52:55,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472895509] [2021-11-20 05:52:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:55,160 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:52:55,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:52:55,161 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:52:55,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 05:52:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:55,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:52:55,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:55,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-20 05:52:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 05:52:55,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:55,595 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-20 05:52:55,595 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 22 treesize of output 15 [2021-11-20 05:52:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 05:52:55,628 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:52:55,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472895509] [2021-11-20 05:52:55,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472895509] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:55,629 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:55,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-20 05:52:55,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932543707] [2021-11-20 05:52:55,629 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:55,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:52:55,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:52:55,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:52:55,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:52:55,631 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:55,845 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2021-11-20 05:52:55,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:52:55,845 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-20 05:52:55,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:55,846 INFO L225 Difference]: With dead ends: 69 [2021-11-20 05:52:55,846 INFO L226 Difference]: Without dead ends: 48 [2021-11-20 05:52:55,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:52:55,847 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:55,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 157 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:52:55,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-20 05:52:55,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-20 05:52:55,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:55,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2021-11-20 05:52:55,856 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 32 [2021-11-20 05:52:55,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:55,857 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2021-11-20 05:52:55,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:55,857 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2021-11-20 05:52:55,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 05:52:55,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:55,859 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:55,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:56,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:52:56,071 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:56,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:56,072 INFO L85 PathProgramCache]: Analyzing trace with hash -791350475, now seen corresponding path program 1 times [2021-11-20 05:52:56,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:52:56,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97353278] [2021-11-20 05:52:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:56,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:52:56,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:52:56,075 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:52:56,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 05:52:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:56,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:52:56,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:52:56,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:52:56,303 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:52:56,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97353278] [2021-11-20 05:52:56,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97353278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:56,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:52:56,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-20 05:52:56,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004751004] [2021-11-20 05:52:56,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:56,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:52:56,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:52:56,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:52:56,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:52:56,306 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:56,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:56,362 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2021-11-20 05:52:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:52:56,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-20 05:52:56,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:56,368 INFO L225 Difference]: With dead ends: 100 [2021-11-20 05:52:56,368 INFO L226 Difference]: Without dead ends: 72 [2021-11-20 05:52:56,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:52:56,369 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:56,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 97 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:52:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-20 05:52:56,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2021-11-20 05:52:56,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:56,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2021-11-20 05:52:56,376 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 33 [2021-11-20 05:52:56,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:56,377 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2021-11-20 05:52:56,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:56,377 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2021-11-20 05:52:56,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 05:52:56,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:56,378 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:56,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:56,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:52:56,591 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:56,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:56,591 INFO L85 PathProgramCache]: Analyzing trace with hash 321125964, now seen corresponding path program 2 times [2021-11-20 05:52:56,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:52:56,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008601136] [2021-11-20 05:52:56,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:52:56,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:52:56,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:52:56,594 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:52:56,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 05:52:56,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:52:56,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:52:56,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:52:56,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:56,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-20 05:52:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 05:52:56,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:57,302 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-20 05:52:57,303 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 22 treesize of output 15 [2021-11-20 05:52:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 05:52:57,333 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:52:57,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008601136] [2021-11-20 05:52:57,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008601136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:57,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:52:57,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-20 05:52:57,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328405418] [2021-11-20 05:52:57,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:57,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:52:57,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:52:57,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:52:57,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:52:57,336 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:57,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:57,609 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2021-11-20 05:52:57,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:52:57,609 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-20 05:52:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:57,610 INFO L225 Difference]: With dead ends: 90 [2021-11-20 05:52:57,610 INFO L226 Difference]: Without dead ends: 86 [2021-11-20 05:52:57,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:52:57,611 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:57,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 121 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 1 Unchecked, 0.2s Time] [2021-11-20 05:52:57,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-20 05:52:57,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2021-11-20 05:52:57,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 65 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:57,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-11-20 05:52:57,618 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 36 [2021-11-20 05:52:57,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:57,619 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-11-20 05:52:57,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:57,620 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-11-20 05:52:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:52:57,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:57,621 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:57,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:57,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:52:57,833 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:57,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:57,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1356456828, now seen corresponding path program 1 times [2021-11-20 05:52:57,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:52:57,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411566486] [2021-11-20 05:52:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:57,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:52:57,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:52:57,835 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:52:57,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 05:52:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:57,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:52:57,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 05:52:58,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 05:52:58,094 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:52:58,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411566486] [2021-11-20 05:52:58,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411566486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:58,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:52:58,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 05:52:58,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072076838] [2021-11-20 05:52:58,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:58,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:52:58,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:52:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:52:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:52:58,095 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:58,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:58,263 INFO L93 Difference]: Finished difference Result 275 states and 356 transitions. [2021-11-20 05:52:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:52:58,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-20 05:52:58,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:58,265 INFO L225 Difference]: With dead ends: 275 [2021-11-20 05:52:58,265 INFO L226 Difference]: Without dead ends: 250 [2021-11-20 05:52:58,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:52:58,266 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 169 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:58,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 162 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:52:58,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-20 05:52:58,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 74. [2021-11-20 05:52:58,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.273972602739726) internal successors, (93), 73 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:58,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2021-11-20 05:52:58,277 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 37 [2021-11-20 05:52:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:58,277 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2021-11-20 05:52:58,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:58,277 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2021-11-20 05:52:58,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 05:52:58,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:58,279 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:58,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:58,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:52:58,479 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:58,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:58,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1148471371, now seen corresponding path program 2 times [2021-11-20 05:52:58,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:52:58,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477081940] [2021-11-20 05:52:58,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:52:58,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:52:58,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:52:58,481 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:52:58,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 05:52:58,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:52:58,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:52:58,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:52:58,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 05:52:58,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 05:52:58,919 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:52:58,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477081940] [2021-11-20 05:52:58,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477081940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:58,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:52:58,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-20 05:52:58,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054781576] [2021-11-20 05:52:58,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:58,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:52:58,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:52:58,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:52:58,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:52:58,921 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:59,633 INFO L93 Difference]: Finished difference Result 726 states and 949 transitions. [2021-11-20 05:52:59,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 05:52:59,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-20 05:52:59,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:59,639 INFO L225 Difference]: With dead ends: 726 [2021-11-20 05:52:59,639 INFO L226 Difference]: Without dead ends: 698 [2021-11-20 05:52:59,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-11-20 05:52:59,641 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 804 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:59,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 575 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:52:59,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-11-20 05:52:59,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 103. [2021-11-20 05:52:59,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.303921568627451) internal successors, (133), 102 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 133 transitions. [2021-11-20 05:52:59,662 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 133 transitions. Word has length 43 [2021-11-20 05:52:59,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:59,662 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 133 transitions. [2021-11-20 05:52:59,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:59,663 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 133 transitions. [2021-11-20 05:52:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 05:52:59,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:59,664 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-20 05:52:59,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:59,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:52:59,876 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:59,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:59,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1208431142, now seen corresponding path program 1 times [2021-11-20 05:52:59,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:52:59,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998429822] [2021-11-20 05:52:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:59,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:52:59,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:52:59,877 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:52:59,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 05:52:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:59,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:52:59,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:53:00,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:53:00,345 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:53:00,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998429822] [2021-11-20 05:53:00,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998429822] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:00,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:53:00,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-20 05:53:00,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228661833] [2021-11-20 05:53:00,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:00,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 05:53:00,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:53:00,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 05:53:00,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:53:00,347 INFO L87 Difference]: Start difference. First operand 103 states and 133 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:00,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:00,541 INFO L93 Difference]: Finished difference Result 247 states and 314 transitions. [2021-11-20 05:53:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:53:00,542 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-20 05:53:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:00,544 INFO L225 Difference]: With dead ends: 247 [2021-11-20 05:53:00,544 INFO L226 Difference]: Without dead ends: 241 [2021-11-20 05:53:00,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:53:00,546 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 131 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:00,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 836 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:53:00,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-20 05:53:00,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 157. [2021-11-20 05:53:00,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.3269230769230769) internal successors, (207), 156 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 207 transitions. [2021-11-20 05:53:00,571 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 207 transitions. Word has length 46 [2021-11-20 05:53:00,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:00,571 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 207 transitions. [2021-11-20 05:53:00,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 207 transitions. [2021-11-20 05:53:00,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 05:53:00,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:00,573 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-20 05:53:00,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:00,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:53:00,785 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:00,785 INFO L85 PathProgramCache]: Analyzing trace with hash -528372772, now seen corresponding path program 1 times [2021-11-20 05:53:00,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:53:00,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524636725] [2021-11-20 05:53:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:00,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:53:00,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:53:00,787 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:53:00,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 05:53:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:00,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:53:00,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:01,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:53:01,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-11-20 05:53:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 05:53:01,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:02,453 INFO L354 Elim1Store]: treesize reduction 11, result has 86.6 percent of original size [2021-11-20 05:53:02,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 86 [2021-11-20 05:53:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:53:03,842 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:53:03,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524636725] [2021-11-20 05:53:03,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524636725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:03,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:53:03,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-20 05:53:03,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638715290] [2021-11-20 05:53:03,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:03,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 05:53:03,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:53:03,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 05:53:03,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:53:03,844 INFO L87 Difference]: Start difference. First operand 157 states and 207 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:04,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:04,352 INFO L93 Difference]: Finished difference Result 395 states and 530 transitions. [2021-11-20 05:53:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 05:53:04,353 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-20 05:53:04,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:04,355 INFO L225 Difference]: With dead ends: 395 [2021-11-20 05:53:04,355 INFO L226 Difference]: Without dead ends: 351 [2021-11-20 05:53:04,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-11-20 05:53:04,357 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 91 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:04,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 313 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 271 Invalid, 0 Unknown, 128 Unchecked, 0.4s Time] [2021-11-20 05:53:04,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-20 05:53:04,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 235. [2021-11-20 05:53:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.3333333333333333) internal successors, (312), 234 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 312 transitions. [2021-11-20 05:53:04,394 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 312 transitions. Word has length 46 [2021-11-20 05:53:04,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:04,394 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 312 transitions. [2021-11-20 05:53:04,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:04,395 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 312 transitions. [2021-11-20 05:53:04,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 05:53:04,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:04,396 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-20 05:53:04,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:04,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:53:04,608 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:04,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:04,608 INFO L85 PathProgramCache]: Analyzing trace with hash -950265704, now seen corresponding path program 2 times [2021-11-20 05:53:04,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:53:04,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437535677] [2021-11-20 05:53:04,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:53:04,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:53:04,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:53:04,610 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:53:04,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 05:53:04,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:53:04,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:04,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 05:53:04,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:05,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:53:05,170 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 32 treesize of output 24 [2021-11-20 05:53:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 05:53:05,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:05,801 INFO L354 Elim1Store]: treesize reduction 8, result has 89.0 percent of original size [2021-11-20 05:53:05,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 80 [2021-11-20 05:53:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 05:53:07,173 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:53:07,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437535677] [2021-11-20 05:53:07,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437535677] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:07,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:53:07,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-11-20 05:53:07,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223994065] [2021-11-20 05:53:07,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:07,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 05:53:07,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:53:07,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 05:53:07,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:53:07,176 INFO L87 Difference]: Start difference. First operand 235 states and 312 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:07,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:07,608 INFO L93 Difference]: Finished difference Result 503 states and 675 transitions. [2021-11-20 05:53:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:53:07,612 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-20 05:53:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:07,615 INFO L225 Difference]: With dead ends: 503 [2021-11-20 05:53:07,615 INFO L226 Difference]: Without dead ends: 453 [2021-11-20 05:53:07,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:53:07,617 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 88 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:07,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 252 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 232 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2021-11-20 05:53:07,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-11-20 05:53:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 330. [2021-11-20 05:53:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.3282674772036474) internal successors, (437), 329 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:07,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 437 transitions. [2021-11-20 05:53:07,661 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 437 transitions. Word has length 46 [2021-11-20 05:53:07,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:07,661 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 437 transitions. [2021-11-20 05:53:07,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:07,662 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 437 transitions. [2021-11-20 05:53:07,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 05:53:07,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:07,663 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-20 05:53:07,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:07,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:53:07,875 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:07,876 INFO L85 PathProgramCache]: Analyzing trace with hash -785729316, now seen corresponding path program 1 times [2021-11-20 05:53:07,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:53:07,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962313513] [2021-11-20 05:53:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:07,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:53:07,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:53:07,878 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:53:07,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 05:53:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:07,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:53:07,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:08,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:53:08,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-11-20 05:53:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 05:53:08,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:10,586 INFO L354 Elim1Store]: treesize reduction 11, result has 86.6 percent of original size [2021-11-20 05:53:10,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 86 [2021-11-20 05:53:12,056 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:53:12,056 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:53:12,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962313513] [2021-11-20 05:53:12,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962313513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:12,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:53:12,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-20 05:53:12,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603240646] [2021-11-20 05:53:12,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:12,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 05:53:12,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:53:12,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 05:53:12,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=370, Unknown=1, NotChecked=0, Total=462 [2021-11-20 05:53:12,059 INFO L87 Difference]: Start difference. First operand 330 states and 437 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:12,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:12,633 INFO L93 Difference]: Finished difference Result 493 states and 659 transitions. [2021-11-20 05:53:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:53:12,634 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-20 05:53:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:12,638 INFO L225 Difference]: With dead ends: 493 [2021-11-20 05:53:12,638 INFO L226 Difference]: Without dead ends: 459 [2021-11-20 05:53:12,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=126, Invalid=473, Unknown=1, NotChecked=0, Total=600 [2021-11-20 05:53:12,639 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 79 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:12,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 240 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 268 Invalid, 0 Unknown, 80 Unchecked, 0.4s Time] [2021-11-20 05:53:12,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-20 05:53:12,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 353. [2021-11-20 05:53:12,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.3181818181818181) internal successors, (464), 352 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 464 transitions. [2021-11-20 05:53:12,684 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 464 transitions. Word has length 46 [2021-11-20 05:53:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:12,684 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 464 transitions. [2021-11-20 05:53:12,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 464 transitions. [2021-11-20 05:53:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 05:53:12,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:12,686 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-20 05:53:12,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-20 05:53:12,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:53:12,897 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:12,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:12,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1342444648, now seen corresponding path program 2 times [2021-11-20 05:53:12,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:53:12,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180064092] [2021-11-20 05:53:12,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:53:12,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:53:12,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:53:12,899 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:53:12,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 05:53:12,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:53:12,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:12,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 05:53:12,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:13,406 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 05:53:13,406 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 33 treesize of output 21 [2021-11-20 05:53:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 05:53:13,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:14,953 INFO L354 Elim1Store]: treesize reduction 8, result has 89.0 percent of original size [2021-11-20 05:53:14,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 80 [2021-11-20 05:53:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 05:53:16,702 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:53:16,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180064092] [2021-11-20 05:53:16,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180064092] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:16,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:53:16,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-11-20 05:53:16,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703787707] [2021-11-20 05:53:16,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:16,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 05:53:16,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:53:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 05:53:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2021-11-20 05:53:16,705 INFO L87 Difference]: Start difference. First operand 353 states and 464 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:17,094 INFO L93 Difference]: Finished difference Result 497 states and 651 transitions. [2021-11-20 05:53:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:53:17,098 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-20 05:53:17,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:17,102 INFO L225 Difference]: With dead ends: 497 [2021-11-20 05:53:17,102 INFO L226 Difference]: Without dead ends: 448 [2021-11-20 05:53:17,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=88, Invalid=253, Unknown=1, NotChecked=0, Total=342 [2021-11-20 05:53:17,104 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:17,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 214 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 230 Invalid, 0 Unknown, 22 Unchecked, 0.3s Time] [2021-11-20 05:53:17,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-20 05:53:17,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 353. [2021-11-20 05:53:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.2982954545454546) internal successors, (457), 352 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 457 transitions. [2021-11-20 05:53:17,154 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 457 transitions. Word has length 46 [2021-11-20 05:53:17,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:17,155 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 457 transitions. [2021-11-20 05:53:17,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:17,155 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 457 transitions. [2021-11-20 05:53:17,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 05:53:17,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:17,157 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:17,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:17,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:53:17,360 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:17,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:17,360 INFO L85 PathProgramCache]: Analyzing trace with hash 88052664, now seen corresponding path program 2 times [2021-11-20 05:53:17,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:53:17,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679448183] [2021-11-20 05:53:17,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:53:17,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:53:17,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:53:17,361 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:53:17,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 05:53:17,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:53:17,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:17,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:53:17,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 05:53:17,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 05:53:17,701 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:53:17,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679448183] [2021-11-20 05:53:17,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679448183] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:17,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:53:17,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 05:53:17,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171170874] [2021-11-20 05:53:17,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:17,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:53:17,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:53:17,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:53:17,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:53:17,704 INFO L87 Difference]: Start difference. First operand 353 states and 457 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:17,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:17,821 INFO L93 Difference]: Finished difference Result 604 states and 774 transitions. [2021-11-20 05:53:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:53:17,821 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-20 05:53:17,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:17,824 INFO L225 Difference]: With dead ends: 604 [2021-11-20 05:53:17,824 INFO L226 Difference]: Without dead ends: 311 [2021-11-20 05:53:17,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:53:17,826 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:17,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 149 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:53:17,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-20 05:53:17,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 309. [2021-11-20 05:53:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.2110389610389611) internal successors, (373), 308 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:17,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 373 transitions. [2021-11-20 05:53:17,875 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 373 transitions. Word has length 49 [2021-11-20 05:53:17,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:17,875 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 373 transitions. [2021-11-20 05:53:17,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:17,876 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 373 transitions. [2021-11-20 05:53:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 05:53:17,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:17,877 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2021-11-20 05:53:17,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:18,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:53:18,090 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:18,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:18,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1190702396, now seen corresponding path program 3 times [2021-11-20 05:53:18,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:53:18,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842992985] [2021-11-20 05:53:18,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:53:18,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:53:18,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:53:18,092 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:53:18,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 05:53:18,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 05:53:18,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:18,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 05:53:18,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:19,510 INFO L354 Elim1Store]: treesize reduction 51, result has 23.9 percent of original size [2021-11-20 05:53:19,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 51 [2021-11-20 05:53:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 05:53:19,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:23,215 INFO L354 Elim1Store]: treesize reduction 83, result has 40.3 percent of original size [2021-11-20 05:53:23,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 92 [2021-11-20 05:53:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 05:53:23,451 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:53:23,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842992985] [2021-11-20 05:53:23,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842992985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:23,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:53:23,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-11-20 05:53:23,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31301071] [2021-11-20 05:53:23,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:23,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 05:53:23,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:53:23,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 05:53:23,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-11-20 05:53:23,454 INFO L87 Difference]: Start difference. First operand 309 states and 373 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:23,940 INFO L93 Difference]: Finished difference Result 637 states and 761 transitions. [2021-11-20 05:53:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:53:23,940 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-20 05:53:23,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:23,944 INFO L225 Difference]: With dead ends: 637 [2021-11-20 05:53:23,944 INFO L226 Difference]: Without dead ends: 404 [2021-11-20 05:53:23,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 05:53:23,946 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 133 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:23,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 414 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 235 Invalid, 0 Unknown, 171 Unchecked, 0.3s Time] [2021-11-20 05:53:23,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-20 05:53:23,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 335. [2021-11-20 05:53:23,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.2035928143712575) internal successors, (402), 334 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:23,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 402 transitions. [2021-11-20 05:53:23,984 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 402 transitions. Word has length 55 [2021-11-20 05:53:23,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:23,985 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 402 transitions. [2021-11-20 05:53:23,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:23,985 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 402 transitions. [2021-11-20 05:53:23,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 05:53:23,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:23,986 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:23,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-20 05:53:24,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:53:24,199 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:24,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:24,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1191953367, now seen corresponding path program 3 times [2021-11-20 05:53:24,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:53:24,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941932616] [2021-11-20 05:53:24,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:53:24,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:53:24,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:53:24,201 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:53:24,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 05:53:24,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 05:53:24,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:24,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:53:24,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:24,496 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 05:53:24,497 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 22 treesize of output 17 [2021-11-20 05:53:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-20 05:53:24,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:24,710 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-20 05:53:24,710 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 25 treesize of output 1 [2021-11-20 05:53:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-20 05:53:24,752 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:53:24,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941932616] [2021-11-20 05:53:24,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941932616] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:24,752 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:24,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 15 [2021-11-20 05:53:24,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638056350] [2021-11-20 05:53:24,752 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:24,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 05:53:24,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:53:24,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 05:53:24,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:53:24,754 INFO L87 Difference]: Start difference. First operand 335 states and 402 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:25,036 INFO L93 Difference]: Finished difference Result 385 states and 456 transitions. [2021-11-20 05:53:25,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:53:25,037 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-20 05:53:25,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:25,039 INFO L225 Difference]: With dead ends: 385 [2021-11-20 05:53:25,039 INFO L226 Difference]: Without dead ends: 358 [2021-11-20 05:53:25,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:53:25,041 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 138 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:25,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 118 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 91 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2021-11-20 05:53:25,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-20 05:53:25,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 322. [2021-11-20 05:53:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.1931464174454829) internal successors, (383), 321 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 383 transitions. [2021-11-20 05:53:25,084 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 383 transitions. Word has length 55 [2021-11-20 05:53:25,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:25,085 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 383 transitions. [2021-11-20 05:53:25,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:25,085 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 383 transitions. [2021-11-20 05:53:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 05:53:25,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:25,087 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:25,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-20 05:53:25,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:53:25,299 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:25,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:25,299 INFO L85 PathProgramCache]: Analyzing trace with hash -416152600, now seen corresponding path program 4 times [2021-11-20 05:53:25,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:53:25,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957600259] [2021-11-20 05:53:25,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:53:25,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:53:25,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:53:25,302 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:53:25,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 05:53:25,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:53:25,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:25,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:53:25,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:25,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-20 05:53:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 05:53:25,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:26,092 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-20 05:53:26,092 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 24 treesize of output 15 [2021-11-20 05:53:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 05:53:26,122 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:53:26,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957600259] [2021-11-20 05:53:26,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957600259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:26,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:53:26,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-11-20 05:53:26,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107679387] [2021-11-20 05:53:26,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:26,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:53:26,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:53:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:53:26,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:53:26,124 INFO L87 Difference]: Start difference. First operand 322 states and 383 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:28,327 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:28,673 INFO L93 Difference]: Finished difference Result 401 states and 466 transitions. [2021-11-20 05:53:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:53:28,673 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-20 05:53:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:28,675 INFO L225 Difference]: With dead ends: 401 [2021-11-20 05:53:28,676 INFO L226 Difference]: Without dead ends: 320 [2021-11-20 05:53:28,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:53:28,678 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:28,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 147 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:53:28,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-20 05:53:28,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 296. [2021-11-20 05:53:28,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.1966101694915254) internal successors, (353), 295 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:28,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 353 transitions. [2021-11-20 05:53:28,722 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 353 transitions. Word has length 56 [2021-11-20 05:53:28,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:28,722 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 353 transitions. [2021-11-20 05:53:28,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 353 transitions. [2021-11-20 05:53:28,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 05:53:28,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:28,729 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:28,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:28,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:53:28,942 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:28,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:28,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1166876799, now seen corresponding path program 5 times [2021-11-20 05:53:28,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:53:28,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72033395] [2021-11-20 05:53:28,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:53:28,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:53:28,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:53:28,944 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:53:28,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 05:53:29,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 05:53:29,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:29,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 05:53:29,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:29,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-20 05:53:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-20 05:53:29,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:30,292 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-20 05:53:30,292 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 24 treesize of output 15 [2021-11-20 05:53:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 05:53:30,390 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:53:30,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72033395] [2021-11-20 05:53:30,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72033395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:30,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:53:30,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-20 05:53:30,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550646527] [2021-11-20 05:53:30,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:30,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 05:53:30,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:53:30,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 05:53:30,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:53:30,392 INFO L87 Difference]: Start difference. First operand 296 states and 353 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:31,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:31,335 INFO L93 Difference]: Finished difference Result 437 states and 520 transitions. [2021-11-20 05:53:31,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 05:53:31,336 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-20 05:53:31,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:31,339 INFO L225 Difference]: With dead ends: 437 [2021-11-20 05:53:31,339 INFO L226 Difference]: Without dead ends: 433 [2021-11-20 05:53:31,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2021-11-20 05:53:31,341 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 191 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:31,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 253 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:53:31,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-20 05:53:31,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 311. [2021-11-20 05:53:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.1870967741935483) internal successors, (368), 310 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 368 transitions. [2021-11-20 05:53:31,395 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 368 transitions. Word has length 57 [2021-11-20 05:53:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:31,396 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 368 transitions. [2021-11-20 05:53:31,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 368 transitions. [2021-11-20 05:53:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 05:53:31,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:31,398 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:31,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:31,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:53:31,600 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:31,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:31,600 INFO L85 PathProgramCache]: Analyzing trace with hash -486663613, now seen corresponding path program 6 times [2021-11-20 05:53:31,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:53:31,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623053896] [2021-11-20 05:53:31,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:53:31,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:53:31,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:53:31,602 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:53:31,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 05:53:31,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-20 05:53:31,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:31,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:53:31,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:53:31,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:53:32,073 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:53:32,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623053896] [2021-11-20 05:53:32,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623053896] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:32,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:53:32,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-20 05:53:32,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817445481] [2021-11-20 05:53:32,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:32,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:53:32,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:53:32,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:53:32,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:53:32,075 INFO L87 Difference]: Start difference. First operand 311 states and 368 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:33,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:33,077 INFO L93 Difference]: Finished difference Result 1646 states and 1957 transitions. [2021-11-20 05:53:33,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 05:53:33,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-20 05:53:33,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:33,088 INFO L225 Difference]: With dead ends: 1646 [2021-11-20 05:53:33,088 INFO L226 Difference]: Without dead ends: 1596 [2021-11-20 05:53:33,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-20 05:53:33,090 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 492 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:33,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 324 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:53:33,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-11-20 05:53:33,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 313. [2021-11-20 05:53:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.189102564102564) internal successors, (371), 312 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:33,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 371 transitions. [2021-11-20 05:53:33,177 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 371 transitions. Word has length 58 [2021-11-20 05:53:33,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:33,177 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 371 transitions. [2021-11-20 05:53:33,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:33,178 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 371 transitions. [2021-11-20 05:53:33,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 05:53:33,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:33,179 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:33,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:33,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:53:33,393 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:33,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:33,393 INFO L85 PathProgramCache]: Analyzing trace with hash 475375663, now seen corresponding path program 7 times [2021-11-20 05:53:33,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:53:33,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112518955] [2021-11-20 05:53:33,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:53:33,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:53:33,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:53:33,395 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:53:33,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 05:53:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:53:33,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:53:33,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:53:34,071 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:53:34,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112518955] [2021-11-20 05:53:34,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112518955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:34,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:53:34,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-20 05:53:34,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299166204] [2021-11-20 05:53:34,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:34,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 05:53:34,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:53:34,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 05:53:34,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:53:34,074 INFO L87 Difference]: Start difference. First operand 313 states and 371 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:37,709 INFO L93 Difference]: Finished difference Result 4445 states and 5312 transitions. [2021-11-20 05:53:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-20 05:53:37,720 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-20 05:53:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:37,738 INFO L225 Difference]: With dead ends: 4445 [2021-11-20 05:53:37,739 INFO L226 Difference]: Without dead ends: 4305 [2021-11-20 05:53:37,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=733, Invalid=1717, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 05:53:37,742 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 2708 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2708 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:37,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2708 Valid, 1044 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 05:53:37,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-11-20 05:53:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 521. [2021-11-20 05:53:37,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.2019230769230769) internal successors, (625), 520 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 625 transitions. [2021-11-20 05:53:37,904 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 625 transitions. Word has length 66 [2021-11-20 05:53:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:37,904 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 625 transitions. [2021-11-20 05:53:37,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 625 transitions. [2021-11-20 05:53:37,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:53:37,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:37,913 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:37,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:38,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:53:38,125 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:38,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:38,126 INFO L85 PathProgramCache]: Analyzing trace with hash -365203249, now seen corresponding path program 8 times [2021-11-20 05:53:38,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:53:38,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309485636] [2021-11-20 05:53:38,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:53:38,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:53:38,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:53:38,128 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:53:38,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 05:53:38,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:53:38,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:38,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:53:38,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 05:53:38,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 05:53:38,802 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:53:38,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309485636] [2021-11-20 05:53:38,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309485636] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:38,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:53:38,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-11-20 05:53:38,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816539454] [2021-11-20 05:53:38,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:38,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:53:38,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:53:38,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:53:38,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:53:38,804 INFO L87 Difference]: Start difference. First operand 521 states and 625 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:39,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:39,326 INFO L93 Difference]: Finished difference Result 983 states and 1149 transitions. [2021-11-20 05:53:39,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 05:53:39,327 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 05:53:39,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:39,330 INFO L225 Difference]: With dead ends: 983 [2021-11-20 05:53:39,330 INFO L226 Difference]: Without dead ends: 977 [2021-11-20 05:53:39,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-11-20 05:53:39,342 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 300 mSDsluCounter, 2220 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 2420 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:39,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 2420 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:53:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-11-20 05:53:39,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 721. [2021-11-20 05:53:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 1.1944444444444444) internal successors, (860), 720 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 860 transitions. [2021-11-20 05:53:39,484 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 860 transitions. Word has length 67 [2021-11-20 05:53:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:39,485 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 860 transitions. [2021-11-20 05:53:39,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:39,485 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 860 transitions. [2021-11-20 05:53:39,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:53:39,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:39,486 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:39,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:39,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:53:39,687 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:39,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:39,687 INFO L85 PathProgramCache]: Analyzing trace with hash 314855121, now seen corresponding path program 3 times [2021-11-20 05:53:39,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:53:39,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475356883] [2021-11-20 05:53:39,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:53:39,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:53:39,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:53:39,689 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:53:39,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 05:53:39,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 05:53:39,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:39,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 05:53:39,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:41,035 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-11-20 05:53:41,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 58 [2021-11-20 05:53:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 25 proven. 41 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 05:53:41,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:44,142 INFO L354 Elim1Store]: treesize reduction 37, result has 80.3 percent of original size [2021-11-20 05:53:44,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 182 [2021-11-20 05:53:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 05:53:55,686 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:53:55,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475356883] [2021-11-20 05:53:55,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475356883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:55,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:53:55,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-11-20 05:53:55,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614602144] [2021-11-20 05:53:55,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:55,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 05:53:55,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:53:55,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 05:53:55,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 05:53:55,689 INFO L87 Difference]: Start difference. First operand 721 states and 860 transitions. Second operand has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:56,844 INFO L93 Difference]: Finished difference Result 881 states and 1036 transitions. [2021-11-20 05:53:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 05:53:56,845 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 05:53:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:56,848 INFO L225 Difference]: With dead ends: 881 [2021-11-20 05:53:56,848 INFO L226 Difference]: Without dead ends: 847 [2021-11-20 05:53:56,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 05:53:56,850 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 229 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:56,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 315 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 374 Invalid, 0 Unknown, 347 Unchecked, 0.5s Time] [2021-11-20 05:53:56,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-11-20 05:53:57,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 769. [2021-11-20 05:53:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 1.1888020833333333) internal successors, (913), 768 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 913 transitions. [2021-11-20 05:53:57,036 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 913 transitions. Word has length 67 [2021-11-20 05:53:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:57,036 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 913 transitions. [2021-11-20 05:53:57,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 913 transitions. [2021-11-20 05:53:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:53:57,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:57,039 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:57,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:57,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:53:57,251 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:57,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:57,251 INFO L85 PathProgramCache]: Analyzing trace with hash -107037811, now seen corresponding path program 4 times [2021-11-20 05:53:57,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:53:57,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715611739] [2021-11-20 05:53:57,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:53:57,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:53:57,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:53:57,252 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:53:57,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 05:53:57,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:53:57,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:57,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 05:53:57,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:58,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:53:58,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-11-20 05:53:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 05:53:58,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:59,037 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-11-20 05:53:59,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 42 [2021-11-20 05:53:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 32 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 05:53:59,135 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:53:59,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715611739] [2021-11-20 05:53:59,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715611739] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:59,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:53:59,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-11-20 05:53:59,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70664866] [2021-11-20 05:53:59,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:59,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 05:53:59,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:53:59,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 05:53:59,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-11-20 05:53:59,137 INFO L87 Difference]: Start difference. First operand 769 states and 913 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 24 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:59,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:59,952 INFO L93 Difference]: Finished difference Result 1423 states and 1674 transitions. [2021-11-20 05:53:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:53:59,953 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 24 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 05:53:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:59,960 INFO L225 Difference]: With dead ends: 1423 [2021-11-20 05:53:59,960 INFO L226 Difference]: Without dead ends: 1359 [2021-11-20 05:53:59,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-11-20 05:53:59,962 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 137 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:59,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 353 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 329 Invalid, 0 Unknown, 170 Unchecked, 0.4s Time] [2021-11-20 05:53:59,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-11-20 05:54:00,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1202. [2021-11-20 05:54:00,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 1.1773522064945878) internal successors, (1414), 1201 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1414 transitions. [2021-11-20 05:54:00,182 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1414 transitions. Word has length 67 [2021-11-20 05:54:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:00,183 INFO L470 AbstractCegarLoop]: Abstraction has 1202 states and 1414 transitions. [2021-11-20 05:54:00,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 24 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1414 transitions. [2021-11-20 05:54:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:54:00,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:00,187 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:00,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-20 05:54:00,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:54:00,401 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:00,402 INFO L85 PathProgramCache]: Analyzing trace with hash 336396625, now seen corresponding path program 3 times [2021-11-20 05:54:00,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:54:00,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104003916] [2021-11-20 05:54:00,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:54:00,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:54:00,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:54:00,403 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:54:00,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 05:54:00,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 05:54:00,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:54:00,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 05:54:00,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:02,809 INFO L354 Elim1Store]: treesize reduction 102, result has 38.2 percent of original size [2021-11-20 05:54:02,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 102 [2021-11-20 05:54:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 42 proven. 20 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 05:54:03,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:11,458 INFO L354 Elim1Store]: treesize reduction 199, result has 0.5 percent of original size [2021-11-20 05:54:11,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 1 [2021-11-20 05:54:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 33 proven. 16 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 05:54:11,500 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:54:11,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104003916] [2021-11-20 05:54:11,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104003916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:54:11,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:54:11,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-11-20 05:54:11,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156059336] [2021-11-20 05:54:11,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:54:11,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 05:54:11,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:54:11,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 05:54:11,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=661, Unknown=6, NotChecked=0, Total=812 [2021-11-20 05:54:11,504 INFO L87 Difference]: Start difference. First operand 1202 states and 1414 transitions. Second operand has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:33,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:33,234 INFO L93 Difference]: Finished difference Result 2040 states and 2366 transitions. [2021-11-20 05:54:33,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 05:54:33,234 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 05:54:33,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:33,241 INFO L225 Difference]: With dead ends: 2040 [2021-11-20 05:54:33,241 INFO L226 Difference]: Without dead ends: 1887 [2021-11-20 05:54:33,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=316, Invalid=1561, Unknown=15, NotChecked=0, Total=1892 [2021-11-20 05:54:33,243 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:33,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 180 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 208 Unchecked, 0.2s Time] [2021-11-20 05:54:33,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2021-11-20 05:54:33,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1220. [2021-11-20 05:54:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 1.1796554552912224) internal successors, (1438), 1219 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:33,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1438 transitions. [2021-11-20 05:54:33,619 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1438 transitions. Word has length 67 [2021-11-20 05:54:33,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:33,619 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 1438 transitions. [2021-11-20 05:54:33,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:33,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1438 transitions. [2021-11-20 05:54:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:54:33,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:33,623 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:33,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-20 05:54:33,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:54:33,836 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:33,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:33,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1685780749, now seen corresponding path program 4 times [2021-11-20 05:54:33,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:54:33,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4020579] [2021-11-20 05:54:33,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:54:33,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:54:33,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:54:33,838 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:54:33,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-20 05:54:33,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:54:33,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:54:33,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 05:54:33,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:34,873 INFO L354 Elim1Store]: treesize reduction 10, result has 82.5 percent of original size [2021-11-20 05:54:34,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 77 [2021-11-20 05:54:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 05:54:35,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:45,538 INFO L354 Elim1Store]: treesize reduction 56, result has 72.0 percent of original size [2021-11-20 05:54:45,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 175 [2021-11-20 05:54:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-20 05:54:47,686 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:54:47,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4020579] [2021-11-20 05:54:47,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4020579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:54:47,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:54:47,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-11-20 05:54:47,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373768364] [2021-11-20 05:54:47,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:54:47,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 05:54:47,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:54:47,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 05:54:47,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=516, Unknown=5, NotChecked=0, Total=650 [2021-11-20 05:54:47,687 INFO L87 Difference]: Start difference. First operand 1220 states and 1438 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:54,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:54,205 INFO L93 Difference]: Finished difference Result 2150 states and 2557 transitions. [2021-11-20 05:54:54,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 05:54:54,206 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 05:54:54,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:54,212 INFO L225 Difference]: With dead ends: 2150 [2021-11-20 05:54:54,213 INFO L226 Difference]: Without dead ends: 1661 [2021-11-20 05:54:54,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=260, Invalid=1140, Unknown=6, NotChecked=0, Total=1406 [2021-11-20 05:54:54,214 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:54,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 200 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 241 Unchecked, 0.2s Time] [2021-11-20 05:54:54,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-11-20 05:54:54,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1561. [2021-11-20 05:54:54,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 1.1878205128205128) internal successors, (1853), 1560 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 1853 transitions. [2021-11-20 05:54:54,619 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 1853 transitions. Word has length 67 [2021-11-20 05:54:54,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:54,619 INFO L470 AbstractCegarLoop]: Abstraction has 1561 states and 1853 transitions. [2021-11-20 05:54:54,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:54,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 1853 transitions. [2021-11-20 05:54:54,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:54:54,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:54,625 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:54,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-20 05:54:54,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:54:54,838 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:54,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:54,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1907586673, now seen corresponding path program 5 times [2021-11-20 05:54:54,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:54:54,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468094785] [2021-11-20 05:54:54,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:54:54,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:54:54,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:54:54,841 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:54:54,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-20 05:54:55,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 05:54:55,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:54:55,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 05:54:55,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 05:54:56,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:57,987 INFO L354 Elim1Store]: treesize reduction 12, result has 85.9 percent of original size [2021-11-20 05:54:57,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 98 [2021-11-20 05:55:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 19 proven. 45 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 05:55:00,759 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:55:00,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468094785] [2021-11-20 05:55:00,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468094785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:55:00,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:00,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-11-20 05:55:00,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635255082] [2021-11-20 05:55:00,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:55:00,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 05:55:00,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:55:00,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 05:55:00,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 05:55:00,762 INFO L87 Difference]: Start difference. First operand 1561 states and 1853 transitions. Second operand has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:07,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:07,978 INFO L93 Difference]: Finished difference Result 3505 states and 4121 transitions. [2021-11-20 05:55:07,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-20 05:55:07,979 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 05:55:07,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:07,994 INFO L225 Difference]: With dead ends: 3505 [2021-11-20 05:55:07,994 INFO L226 Difference]: Without dead ends: 3248 [2021-11-20 05:55:07,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1034, Invalid=5286, Unknown=0, NotChecked=0, Total=6320 [2021-11-20 05:55:07,997 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 202 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 860 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:07,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 674 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 390 Invalid, 0 Unknown, 860 Unchecked, 0.7s Time] [2021-11-20 05:55:08,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-11-20 05:55:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 2442. [2021-11-20 05:55:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 2441 states have (on average 1.1974600573535437) internal successors, (2923), 2441 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:08,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 2923 transitions. [2021-11-20 05:55:08,579 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 2923 transitions. Word has length 67 [2021-11-20 05:55:08,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:08,579 INFO L470 AbstractCegarLoop]: Abstraction has 2442 states and 2923 transitions. [2021-11-20 05:55:08,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:08,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 2923 transitions. [2021-11-20 05:55:08,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:55:08,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:08,586 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2021-11-20 05:55:08,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:08,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:55:08,793 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:08,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:08,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1649421235, now seen corresponding path program 1 times [2021-11-20 05:55:08,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:55:08,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202050881] [2021-11-20 05:55:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:08,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:55:08,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:55:08,795 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:55:08,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-20 05:55:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:08,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 05:55:08,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:10,665 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-20 05:55:10,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 35 [2021-11-20 05:55:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 58 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 05:55:10,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:15,268 INFO L354 Elim1Store]: treesize reduction 73, result has 74.7 percent of original size [2021-11-20 05:55:15,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 80 treesize of output 247 [2021-11-20 05:56:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 05:56:23,452 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:56:23,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202050881] [2021-11-20 05:56:23,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202050881] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:23,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:56:23,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-11-20 05:56:23,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756931153] [2021-11-20 05:56:23,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:23,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 05:56:23,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:56:23,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 05:56:23,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1051, Unknown=1, NotChecked=0, Total=1260 [2021-11-20 05:56:23,455 INFO L87 Difference]: Start difference. First operand 2442 states and 2923 transitions. Second operand has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:29,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:29,817 INFO L93 Difference]: Finished difference Result 2687 states and 3199 transitions. [2021-11-20 05:56:29,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 05:56:29,818 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 05:56:29,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:29,827 INFO L225 Difference]: With dead ends: 2687 [2021-11-20 05:56:29,827 INFO L226 Difference]: Without dead ends: 2506 [2021-11-20 05:56:29,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=412, Invalid=2036, Unknown=2, NotChecked=0, Total=2450 [2021-11-20 05:56:29,829 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 262 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:29,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 348 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 810 Invalid, 0 Unknown, 104 Unchecked, 1.6s Time] [2021-11-20 05:56:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-11-20 05:56:30,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2353. [2021-11-20 05:56:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2353 states, 2352 states have (on average 1.1921768707482994) internal successors, (2804), 2352 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 2804 transitions. [2021-11-20 05:56:30,339 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 2804 transitions. Word has length 67 [2021-11-20 05:56:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:30,339 INFO L470 AbstractCegarLoop]: Abstraction has 2353 states and 2804 transitions. [2021-11-20 05:56:30,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 2804 transitions. [2021-11-20 05:56:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:56:30,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:30,346 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2021-11-20 05:56:30,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:30,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:56:30,558 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:30,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:30,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1549071377, now seen corresponding path program 2 times [2021-11-20 05:56:30,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:56:30,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245417828] [2021-11-20 05:56:30,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:56:30,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:56:30,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:56:30,561 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:56:30,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8887fcab-a14c-41a5-a48d-e7c2396d6255/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-20 05:56:30,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:56:30,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:56:30,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 05:56:30,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:31,742 INFO L354 Elim1Store]: treesize reduction 6, result has 89.5 percent of original size [2021-11-20 05:56:31,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 81 [2021-11-20 05:56:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 05:56:31,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:45,380 INFO L354 Elim1Store]: treesize reduction 56, result has 72.0 percent of original size [2021-11-20 05:56:45,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 175 [2021-11-20 05:56:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-20 05:56:48,912 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:56:48,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245417828] [2021-11-20 05:56:48,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245417828] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:48,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:56:48,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-11-20 05:56:48,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273327700] [2021-11-20 05:56:48,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:48,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 05:56:48,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:56:48,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 05:56:48,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=520, Unknown=5, NotChecked=0, Total=650 [2021-11-20 05:56:48,913 INFO L87 Difference]: Start difference. First operand 2353 states and 2804 transitions. Second operand has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:49,960 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ sign_extend 24) ((_ extract 7 0) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#input_string~0#1.base|) (bvadd |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~#input_string~0#1.offset|))))) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vogal_array~0#1.base|))) (and (exists ((|ULTIMATE.start_main_~i~0#1| (_ BitVec 32))) (let ((.cse0 ((_ extract 7 0) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#input_string~0#1.base|) (bvadd |ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~#input_string~0#1.offset|))))) (and (= .cse0 |c_ULTIMATE.start_main_#t~mem8#1|) (= ((_ sign_extend 24) .cse0) ((_ sign_extend 24) ((_ extract 7 0) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#vogal_array~0#1.base|) |c_ULTIMATE.start_main_~#vogal_array~0#1.offset|))))))) (= |c_ULTIMATE.start_main_~#vogal_array~0#1.offset| (_ bv0 32)) (or (= ((_ sign_extend 24) ((_ extract 7 0) (select .cse1 (bvadd |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~#vogal_array~0#1.offset|)))) .cse2) (forall ((|v_ULTIMATE.start_main_~i~0#1_171| (_ BitVec 32))) (let ((.cse3 ((_ sign_extend 24) ((_ extract 7 0) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#input_string~0#1.base|) (bvadd |v_ULTIMATE.start_main_~i~0#1_171| |c_ULTIMATE.start_main_~#input_string~0#1.offset|))))) (.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vogal_array~0#1.base|))) (or (not (= .cse3 ((_ sign_extend 24) ((_ extract 7 0) (select .cse4 |c_ULTIMATE.start_main_~#vogal_array~0#1.offset|))))) (not (= .cse3 ((_ sign_extend 24) ((_ extract 7 0) (select .cse4 (bvadd |c_ULTIMATE.start_main_~#vogal_array~0#1.offset| (_ bv1 32))))))))))) (= |c_ULTIMATE.start_main_~i~0#1| (_ bv0 32)) (= ((_ extract 7 0) (select .cse1 (bvadd |c_ULTIMATE.start_main_~#vogal_array~0#1.offset| (_ bv1 32)))) |c_ULTIMATE.start_main_#t~mem9#1|) (= .cse2 ((_ sign_extend 24) ((_ extract 7 0) (select .cse1 |c_ULTIMATE.start_main_~#vogal_array~0#1.offset|)))) (= |c_ULTIMATE.start_main_~#input_string~0#1.offset| (_ bv0 32)) (= |c_ULTIMATE.start_main_~j~0#1| (_ bv1 32)))) is different from false [2021-11-20 05:56:57,924 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:56:58,251 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vogal_array~0#1.base|)) (.cse9 ((_ sign_extend 24) ((_ extract 7 0) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#input_string~0#1.base|) (bvadd |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~#input_string~0#1.offset|)))))) (let ((.cse1 (= ((_ sign_extend 24) ((_ extract 7 0) (select .cse4 (bvadd |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~#vogal_array~0#1.offset|)))) .cse9))) (and (exists ((|ULTIMATE.start_main_~i~0#1| (_ BitVec 32))) (let ((.cse0 ((_ extract 7 0) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#input_string~0#1.base|) (bvadd |ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~#input_string~0#1.offset|))))) (and (= .cse0 |c_ULTIMATE.start_main_#t~mem8#1|) (= ((_ sign_extend 24) .cse0) ((_ sign_extend 24) ((_ extract 7 0) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#vogal_array~0#1.base|) |c_ULTIMATE.start_main_~#vogal_array~0#1.offset|))))))) (not .cse1) (= |c_ULTIMATE.start_main_~#vogal_array~0#1.offset| (_ bv0 32)) (or .cse1 (forall ((|v_ULTIMATE.start_main_~i~0#1_171| (_ BitVec 32))) (let ((.cse2 ((_ sign_extend 24) ((_ extract 7 0) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#input_string~0#1.base|) (bvadd |v_ULTIMATE.start_main_~i~0#1_171| |c_ULTIMATE.start_main_~#input_string~0#1.offset|))))) (.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vogal_array~0#1.base|))) (or (not (= .cse2 ((_ sign_extend 24) ((_ extract 7 0) (select .cse3 |c_ULTIMATE.start_main_~#vogal_array~0#1.offset|))))) (not (= .cse2 ((_ sign_extend 24) ((_ extract 7 0) (select .cse3 (bvadd |c_ULTIMATE.start_main_~#vogal_array~0#1.offset| (_ bv1 32))))))))))) (= ((_ extract 7 0) (select .cse4 (bvadd |c_ULTIMATE.start_main_~#vogal_array~0#1.offset| (_ bv1 32)))) |c_ULTIMATE.start_main_#t~mem9#1|) (exists ((v_arrayElimCell_102 (_ BitVec 32)) (v_arrayElimCell_104 (_ BitVec 32)) (v_arrayElimCell_103 (_ BitVec 32)) (v_arrayElimCell_105 (_ BitVec 32))) (let ((.cse6 ((_ extract 7 0) v_arrayElimCell_105)) (.cse5 ((_ sign_extend 24) ((_ extract 7 0) v_arrayElimCell_102))) (.cse7 ((_ sign_extend 24) ((_ extract 7 0) v_arrayElimCell_104))) (.cse8 ((_ extract 7 0) v_arrayElimCell_103))) (and (= .cse5 ((_ sign_extend 24) .cse6)) (= .cse6 |c_ULTIMATE.start_main_#t~mem8#1|) (= .cse7 .cse5) (= .cse8 |c_ULTIMATE.start_main_#t~mem9#1|) (not (= .cse7 ((_ sign_extend 24) .cse8)))))) (= .cse9 ((_ sign_extend 24) ((_ extract 7 0) (select .cse4 |c_ULTIMATE.start_main_~#vogal_array~0#1.offset|)))) (= |c_ULTIMATE.start_main_~#input_string~0#1.offset| (_ bv0 32)) (= |c_ULTIMATE.start_main_~j~0#1| (_ bv1 32))))) is different from false [2021-11-20 05:56:58,275 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ sign_extend 24) ((_ extract 7 0) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#input_string~0#1.base|) (bvadd |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~#input_string~0#1.offset|))))) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vogal_array~0#1.base|))) (and (exists ((|ULTIMATE.start_main_~i~0#1| (_ BitVec 32))) (let ((.cse0 ((_ extract 7 0) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#input_string~0#1.base|) (bvadd |ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~#input_string~0#1.offset|))))) (and (= .cse0 |c_ULTIMATE.start_main_#t~mem8#1|) (= ((_ sign_extend 24) .cse0) ((_ sign_extend 24) ((_ extract 7 0) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#vogal_array~0#1.base|) |c_ULTIMATE.start_main_~#vogal_array~0#1.offset|))))))) (= |c_ULTIMATE.start_main_~#vogal_array~0#1.offset| (_ bv0 32)) (or (= ((_ sign_extend 24) ((_ extract 7 0) (select .cse1 (bvadd |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~#vogal_array~0#1.offset|)))) .cse2) (forall ((|v_ULTIMATE.start_main_~i~0#1_171| (_ BitVec 32))) (let ((.cse3 ((_ sign_extend 24) ((_ extract 7 0) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#input_string~0#1.base|) (bvadd |v_ULTIMATE.start_main_~i~0#1_171| |c_ULTIMATE.start_main_~#input_string~0#1.offset|))))) (.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vogal_array~0#1.base|))) (or (not (= .cse3 ((_ sign_extend 24) ((_ extract 7 0) (select .cse4 |c_ULTIMATE.start_main_~#vogal_array~0#1.offset|))))) (not (= .cse3 ((_ sign_extend 24) ((_ extract 7 0) (select .cse4 (bvadd |c_ULTIMATE.start_main_~#vogal_array~0#1.offset| (_ bv1 32))))))))))) (= ((_ extract 7 0) (select .cse1 (bvadd |c_ULTIMATE.start_main_~#vogal_array~0#1.offset| (_ bv1 32)))) |c_ULTIMATE.start_main_#t~mem9#1|) (= .cse2 ((_ sign_extend 24) ((_ extract 7 0) (select .cse1 |c_ULTIMATE.start_main_~#vogal_array~0#1.offset|)))) (= |c_ULTIMATE.start_main_~#input_string~0#1.offset| (_ bv0 32)) (= |c_ULTIMATE.start_main_~j~0#1| (_ bv1 32)))) is different from false