./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/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_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/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_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/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 1caf94d5755d978efe1a3e5e557e469a697b8b845c60d509025c0b6bf4eae4ae --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:59:15,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:59:15,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:59:15,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:59:15,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:59:15,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:59:15,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:59:15,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:59:15,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:59:15,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:59:15,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:59:15,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:59:15,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:59:15,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:59:15,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:59:15,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:59:15,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:59:15,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:59:15,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:59:15,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:59:15,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:59:15,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:59:15,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:59:15,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:59:15,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:59:15,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:59:15,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:59:15,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:59:15,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:59:15,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:59:15,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:59:15,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:59:15,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:59:15,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:59:15,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:59:15,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:59:15,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:59:15,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:59:15,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:59:15,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:59:15,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:59:15,972 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:59:16,001 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:59:16,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:59:16,002 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:59:16,002 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:59:16,003 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:59:16,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:59:16,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:59:16,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:59:16,004 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:59:16,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:59:16,005 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:59:16,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:59:16,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:59:16,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:59:16,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:59:16,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:59:16,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:59:16,007 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:59:16,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:59:16,007 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:59:16,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:59:16,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:59:16,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:59:16,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:59:16,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:59:16,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:59:16,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:59:16,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:59:16,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:59:16,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:59:16,010 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:59:16,011 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:59:16,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:59:16,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:59:16,011 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_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1caf94d5755d978efe1a3e5e557e469a697b8b845c60d509025c0b6bf4eae4ae [2021-11-20 06:59:16,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:59:16,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:59:16,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:59:16,396 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:59:16,397 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:59:16,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-crafted/zero_sum5.c [2021-11-20 06:59:16,471 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/data/3f4fea70d/41676fa7b687449ebaf77f3eedd4fbff/FLAGc19eae815 [2021-11-20 06:59:17,001 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:59:17,006 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/sv-benchmarks/c/array-crafted/zero_sum5.c [2021-11-20 06:59:17,019 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/data/3f4fea70d/41676fa7b687449ebaf77f3eedd4fbff/FLAGc19eae815 [2021-11-20 06:59:17,352 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/data/3f4fea70d/41676fa7b687449ebaf77f3eedd4fbff [2021-11-20 06:59:17,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:59:17,356 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:59:17,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:59:17,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:59:17,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:59:17,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:59:17" (1/1) ... [2021-11-20 06:59:17,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad9d337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:17, skipping insertion in model container [2021-11-20 06:59:17,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:59:17" (1/1) ... [2021-11-20 06:59:17,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:59:17,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:59:17,601 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_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/sv-benchmarks/c/array-crafted/zero_sum5.c[400,413] [2021-11-20 06:59:17,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:59:17,644 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:59:17,660 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_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/sv-benchmarks/c/array-crafted/zero_sum5.c[400,413] [2021-11-20 06:59:17,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:59:17,690 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:59:17,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:17 WrapperNode [2021-11-20 06:59:17,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:59:17,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:59:17,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:59:17,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:59:17,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:17" (1/1) ... [2021-11-20 06:59:17,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:17" (1/1) ... [2021-11-20 06:59:17,741 INFO L137 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 149 [2021-11-20 06:59:17,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:59:17,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:59:17,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:59:17,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:59:17,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:17" (1/1) ... [2021-11-20 06:59:17,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:17" (1/1) ... [2021-11-20 06:59:17,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:17" (1/1) ... [2021-11-20 06:59:17,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:17" (1/1) ... [2021-11-20 06:59:17,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:17" (1/1) ... [2021-11-20 06:59:17,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:17" (1/1) ... [2021-11-20 06:59:17,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:17" (1/1) ... [2021-11-20 06:59:17,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:59:17,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:59:17,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:59:17,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:59:17,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:17" (1/1) ... [2021-11-20 06:59:17,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:59:17,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:17,811 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:59:17,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:59:17,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:59:17,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:59:17,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:59:17,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:59:17,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:59:17,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:59:17,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:59:17,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:59:17,990 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:59:17,992 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:59:18,263 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:59:18,271 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:59:18,271 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-20 06:59:18,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:59:18 BoogieIcfgContainer [2021-11-20 06:59:18,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:59:18,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:59:18,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:59:18,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:59:18,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:59:17" (1/3) ... [2021-11-20 06:59:18,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499f6521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:59:18, skipping insertion in model container [2021-11-20 06:59:18,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:59:17" (2/3) ... [2021-11-20 06:59:18,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499f6521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:59:18, skipping insertion in model container [2021-11-20 06:59:18,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:59:18" (3/3) ... [2021-11-20 06:59:18,282 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum5.c [2021-11-20 06:59:18,287 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:59:18,287 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:59:18,339 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:59:18,347 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 06:59:18,347 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:59:18,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 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 06:59:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:59:18,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:18,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:18,382 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:18,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:18,388 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2021-11-20 06:59:18,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:18,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11924668] [2021-11-20 06:59:18,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:18,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:18,597 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 06:59:18,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:18,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11924668] [2021-11-20 06:59:18,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11924668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:59:18,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:59:18,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:59:18,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555386244] [2021-11-20 06:59:18,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:59:18,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:59:18,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:18,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:59:18,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:59:18,649 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 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) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 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 06:59:18,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:18,701 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2021-11-20 06:59:18,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:59:18,704 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 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 27 [2021-11-20 06:59:18,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:18,713 INFO L225 Difference]: With dead ends: 83 [2021-11-20 06:59:18,713 INFO L226 Difference]: Without dead ends: 39 [2021-11-20 06:59:18,718 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 06:59:18,727 INFO L933 BasicCegarLoop]: 55 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, 55 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 06:59:18,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:59:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-20 06:59:18,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-20 06:59:18,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 06:59:18,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-11-20 06:59:18,793 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2021-11-20 06:59:18,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:18,793 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-11-20 06:59:18,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 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 06:59:18,794 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-11-20 06:59:18,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:59:18,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:18,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:18,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:59:18,798 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:18,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:18,802 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2021-11-20 06:59:18,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:18,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727817956] [2021-11-20 06:59:18,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:18,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:18,931 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 06:59:18,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:18,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727817956] [2021-11-20 06:59:18,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727817956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:59:18,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:59:18,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:59:18,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921667102] [2021-11-20 06:59:18,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:59:18,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:59:18,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:18,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:59:18,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:59:18,937 INFO L87 Difference]: Start difference. First operand 39 states and 49 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 06:59:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:19,031 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2021-11-20 06:59:19,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:59:19,032 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 27 [2021-11-20 06:59:19,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:19,033 INFO L225 Difference]: With dead ends: 75 [2021-11-20 06:59:19,034 INFO L226 Difference]: Without dead ends: 41 [2021-11-20 06:59:19,034 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 06:59:19,036 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:19,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 70 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:59:19,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-20 06:59:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-11-20 06:59:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 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 06:59:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-11-20 06:59:19,049 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2021-11-20 06:59:19,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:19,051 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-11-20 06:59:19,052 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 06:59:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-11-20 06:59:19,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 06:59:19,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:19,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:19,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:59:19,058 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:19,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:19,059 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2021-11-20 06:59:19,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:19,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369477950] [2021-11-20 06:59:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:19,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:19,173 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 06:59:19,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369477950] [2021-11-20 06:59:19,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369477950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:59:19,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:59:19,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:59:19,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440298210] [2021-11-20 06:59:19,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:59:19,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:59:19,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:19,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:59:19,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:59:19,177 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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 06:59:19,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:19,340 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2021-11-20 06:59:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:59:19,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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 29 [2021-11-20 06:59:19,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:19,342 INFO L225 Difference]: With dead ends: 91 [2021-11-20 06:59:19,342 INFO L226 Difference]: Without dead ends: 60 [2021-11-20 06:59:19,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:59:19,345 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:19,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 21 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:59:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-20 06:59:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2021-11-20 06:59:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 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 06:59:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-11-20 06:59:19,360 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2021-11-20 06:59:19,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:19,361 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-11-20 06:59:19,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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 06:59:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-11-20 06:59:19,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 06:59:19,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:19,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:19,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:59:19,364 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2021-11-20 06:59:19,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:19,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978656493] [2021-11-20 06:59:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:19,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:59:19,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:19,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978656493] [2021-11-20 06:59:19,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978656493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:19,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445756363] [2021-11-20 06:59:19,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:19,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:19,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:19,497 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:19,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:59:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:19,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:59:19,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:59:19,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:59:20,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445756363] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:59:20,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:59:20,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-20 06:59:20,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744088231] [2021-11-20 06:59:20,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:20,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:59:20,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:20,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:59:20,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:59:20,092 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:20,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:20,179 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2021-11-20 06:59:20,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:59:20,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-20 06:59:20,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:20,181 INFO L225 Difference]: With dead ends: 97 [2021-11-20 06:59:20,182 INFO L226 Difference]: Without dead ends: 53 [2021-11-20 06:59:20,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:59:20,190 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:20,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:59:20,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-20 06:59:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-11-20 06:59:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 06:59:20,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-11-20 06:59:20,204 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2021-11-20 06:59:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:20,205 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-11-20 06:59:20,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:20,205 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-11-20 06:59:20,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 06:59:20,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:20,209 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:20,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:20,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:20,424 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:20,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2021-11-20 06:59:20,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:20,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356863619] [2021-11-20 06:59:20,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:20,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:59:20,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:20,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356863619] [2021-11-20 06:59:20,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356863619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:20,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852783613] [2021-11-20 06:59:20,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:59:20,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:20,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:20,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:20,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:59:20,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:59:20,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:59:20,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:59:20,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:59:20,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:59:20,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852783613] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:59:20,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:59:20,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-11-20 06:59:20,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743116135] [2021-11-20 06:59:20,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:20,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:59:20,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:20,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:59:20,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:59:20,986 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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 06:59:21,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:21,210 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2021-11-20 06:59:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:59:21,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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 51 [2021-11-20 06:59:21,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:21,217 INFO L225 Difference]: With dead ends: 122 [2021-11-20 06:59:21,217 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 06:59:21,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:59:21,220 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:21,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 33 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:59:21,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 06:59:21,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-11-20 06:59:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 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 06:59:21,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-11-20 06:59:21,250 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2021-11-20 06:59:21,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:21,251 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-11-20 06:59:21,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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 06:59:21,251 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-11-20 06:59:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 06:59:21,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:21,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:21,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 06:59:21,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:21,466 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:21,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:21,466 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2021-11-20 06:59:21,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:21,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071255829] [2021-11-20 06:59:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:21,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:59:23,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:23,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071255829] [2021-11-20 06:59:23,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071255829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:23,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385724303] [2021-11-20 06:59:23,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:59:23,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:23,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:23,817 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:23,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:59:23,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:59:23,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:59:23,916 WARN L261 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-20 06:59:23,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:26,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:59:26,655 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 26 [2021-11-20 06:59:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:59:26,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:38,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:59:38,588 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 93 treesize of output 121 [2021-11-20 06:59:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:59:40,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385724303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:59:40,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:59:40,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 29] total 60 [2021-11-20 06:59:40,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593374925] [2021-11-20 06:59:40,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:40,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-20 06:59:40,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:40,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-20 06:59:40,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=3200, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 06:59:40,116 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 60 states, 60 states have (on average 3.4166666666666665) internal successors, (205), 60 states have internal predecessors, (205), 0 states have call successors, (0), 0 states 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 06:59:43,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:43,583 INFO L93 Difference]: Finished difference Result 198 states and 228 transitions. [2021-11-20 06:59:43,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 06:59:43,583 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.4166666666666665) internal successors, (205), 60 states have internal predecessors, (205), 0 states have call successors, (0), 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 71 [2021-11-20 06:59:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:43,586 INFO L225 Difference]: With dead ends: 198 [2021-11-20 06:59:43,587 INFO L226 Difference]: Without dead ends: 192 [2021-11-20 06:59:43,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 97 SyntacticMatches, 54 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3339 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=810, Invalid=7380, Unknown=0, NotChecked=0, Total=8190 [2021-11-20 06:59:43,592 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 127 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1273 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:43,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 163 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 499 Invalid, 0 Unknown, 1273 Unchecked, 0.4s Time] [2021-11-20 06:59:43,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-20 06:59:43,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 125. [2021-11-20 06:59:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 124 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 06:59:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2021-11-20 06:59:43,615 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2021-11-20 06:59:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:43,616 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2021-11-20 06:59:43,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.4166666666666665) internal successors, (205), 60 states have internal predecessors, (205), 0 states have call successors, (0), 0 states 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 06:59:43,616 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2021-11-20 06:59:43,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 06:59:43,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:43,618 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:43,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:43,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:43,845 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2021-11-20 06:59:43,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:43,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605427988] [2021-11-20 06:59:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:43,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:59:43,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:43,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605427988] [2021-11-20 06:59:43,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605427988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:43,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215804826] [2021-11-20 06:59:43,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:59:43,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:43,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:43,949 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:43,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:59:44,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:59:44,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:59:44,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:59:44,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:59:44,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:59:44,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215804826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:59:44,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:59:44,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-20 06:59:44,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105928504] [2021-11-20 06:59:44,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:44,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:59:44,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:44,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:59:44,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:59:44,386 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 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 06:59:44,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:44,698 INFO L93 Difference]: Finished difference Result 248 states and 286 transitions. [2021-11-20 06:59:44,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:59:44,699 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 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 73 [2021-11-20 06:59:44,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:44,700 INFO L225 Difference]: With dead ends: 248 [2021-11-20 06:59:44,700 INFO L226 Difference]: Without dead ends: 128 [2021-11-20 06:59:44,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:59:44,702 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 117 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:44,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 97 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:59:44,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-20 06:59:44,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-11-20 06:59:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 126 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 06:59:44,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2021-11-20 06:59:44,718 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 73 [2021-11-20 06:59:44,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:44,718 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2021-11-20 06:59:44,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 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 06:59:44,719 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2021-11-20 06:59:44,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 06:59:44,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:44,721 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:44,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:44,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:44,945 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:44,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:44,946 INFO L85 PathProgramCache]: Analyzing trace with hash 570637516, now seen corresponding path program 5 times [2021-11-20 06:59:44,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:44,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504986123] [2021-11-20 06:59:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:44,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:59:45,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:45,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504986123] [2021-11-20 06:59:45,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504986123] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:45,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729847877] [2021-11-20 06:59:45,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:59:45,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:45,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:45,027 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:45,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:59:45,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-20 06:59:45,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:59:45,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:59:45,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:59:45,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:59:45,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729847877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:59:45,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:59:45,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-20 06:59:45,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559926654] [2021-11-20 06:59:45,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:45,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:59:45,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:45,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:59:45,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:59:45,606 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 06:59:45,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:45,941 INFO L93 Difference]: Finished difference Result 209 states and 245 transitions. [2021-11-20 06:59:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:59:45,942 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 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 75 [2021-11-20 06:59:45,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:45,943 INFO L225 Difference]: With dead ends: 209 [2021-11-20 06:59:45,943 INFO L226 Difference]: Without dead ends: 104 [2021-11-20 06:59:45,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:59:45,945 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 278 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:45,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 33 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:59:45,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-20 06:59:45,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2021-11-20 06:59:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 06:59:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-11-20 06:59:45,965 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2021-11-20 06:59:45,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:45,966 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-11-20 06:59:45,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 06:59:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-11-20 06:59:45,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:59:45,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:45,970 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:46,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:46,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:46,189 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:46,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2021-11-20 06:59:46,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:46,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753041233] [2021-11-20 06:59:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:46,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:59:50,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:50,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753041233] [2021-11-20 06:59:50,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753041233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:50,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497569766] [2021-11-20 06:59:50,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:59:50,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:50,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:50,549 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:50,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:59:50,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-20 06:59:50,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:59:50,630 WARN L261 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 136 conjunts are in the unsatisfiable core [2021-11-20 06:59:50,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:59:55,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:00:34,532 INFO L354 Elim1Store]: treesize reduction 72, result has 68.8 percent of original size [2021-11-20 07:00:34,532 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 133 treesize of output 199 [2021-11-20 07:00:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 4 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:00:44,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497569766] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:00:44,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:00:44,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 45] total 125 [2021-11-20 07:00:44,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168187225] [2021-11-20 07:00:44,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:00:44,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-11-20 07:00:44,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:00:45,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-11-20 07:00:45,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1068, Invalid=14423, Unknown=9, NotChecked=0, Total=15500 [2021-11-20 07:00:45,008 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 125 states, 125 states have (on average 1.968) internal successors, (246), 125 states have internal predecessors, (246), 0 states have call successors, (0), 0 states 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 07:01:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:01:19,778 INFO L93 Difference]: Finished difference Result 271 states and 304 transitions. [2021-11-20 07:01:19,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-20 07:01:19,779 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.968) internal successors, (246), 125 states have internal predecessors, (246), 0 states have call successors, (0), 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 93 [2021-11-20 07:01:19,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:01:19,781 INFO L225 Difference]: With dead ends: 271 [2021-11-20 07:01:19,781 INFO L226 Difference]: Without dead ends: 267 [2021-11-20 07:01:19,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 120 SyntacticMatches, 37 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 15586 ImplicationChecksByTransitivity, 73.0s TimeCoverageRelationStatistics Valid=3028, Invalid=36761, Unknown=11, NotChecked=0, Total=39800 [2021-11-20 07:01:19,794 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 221 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 4694 mSolverCounterSat, 883 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 8242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 883 IncrementalHoareTripleChecker+Valid, 4694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2665 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:01:19,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 417 Invalid, 8242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [883 Valid, 4694 Invalid, 0 Unknown, 2665 Unchecked, 4.8s Time] [2021-11-20 07:01:19,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-20 07:01:19,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 199. [2021-11-20 07:01:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.1313131313131313) internal successors, (224), 198 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:01:19,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 224 transitions. [2021-11-20 07:01:19,822 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 224 transitions. Word has length 93 [2021-11-20 07:01:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:01:19,823 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 224 transitions. [2021-11-20 07:01:19,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.968) internal successors, (246), 125 states have internal predecessors, (246), 0 states have call successors, (0), 0 states 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 07:01:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 224 transitions. [2021-11-20 07:01:19,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 07:01:19,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:01:19,827 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:01:19,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:01:20,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:20,049 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:01:20,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:01:20,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1592040608, now seen corresponding path program 7 times [2021-11-20 07:01:20,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:01:20,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130690020] [2021-11-20 07:01:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:01:20,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:01:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 07:01:20,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:01:20,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130690020] [2021-11-20 07:01:20,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130690020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:01:20,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354285158] [2021-11-20 07:01:20,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:01:20,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:20,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:01:20,175 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:01:20,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:01:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:20,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:01:20,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:01:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 07:01:20,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:01:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 07:01:20,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354285158] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:01:20,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:01:20,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-20 07:01:20,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286514661] [2021-11-20 07:01:20,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:01:20,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:01:20,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:01:20,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:01:20,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:01:20,833 INFO L87 Difference]: Start difference. First operand 199 states and 224 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 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 07:01:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:01:21,271 INFO L93 Difference]: Finished difference Result 449 states and 506 transitions. [2021-11-20 07:01:21,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:01:21,274 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 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 95 [2021-11-20 07:01:21,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:01:21,276 INFO L225 Difference]: With dead ends: 449 [2021-11-20 07:01:21,276 INFO L226 Difference]: Without dead ends: 202 [2021-11-20 07:01:21,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:01:21,278 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 173 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:01:21,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 102 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:01:21,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-20 07:01:21,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2021-11-20 07:01:21,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.13) internal successors, (226), 200 states have internal predecessors, (226), 0 states have call successors, (0), 0 states 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 07:01:21,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 226 transitions. [2021-11-20 07:01:21,300 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 226 transitions. Word has length 95 [2021-11-20 07:01:21,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:01:21,300 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 226 transitions. [2021-11-20 07:01:21,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 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 07:01:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 226 transitions. [2021-11-20 07:01:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 07:01:21,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:01:21,302 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:01:21,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:01:21,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:01:21,509 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:01:21,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:01:21,509 INFO L85 PathProgramCache]: Analyzing trace with hash -132149886, now seen corresponding path program 8 times [2021-11-20 07:01:21,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:01:21,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176004383] [2021-11-20 07:01:21,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:01:21,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:01:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-20 07:01:21,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:01:21,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176004383] [2021-11-20 07:01:21,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176004383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:01:21,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745029584] [2021-11-20 07:01:21,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:01:21,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:21,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:01:21,713 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:01:21,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:01:21,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:01:21,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:01:21,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:01:21,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:01:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-20 07:01:22,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:01:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-20 07:01:22,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745029584] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:01:22,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:01:22,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-20 07:01:22,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87584200] [2021-11-20 07:01:22,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:01:22,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:01:22,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:01:22,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:01:22,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:01:22,368 INFO L87 Difference]: Start difference. First operand 201 states and 226 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 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 07:01:22,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:01:22,777 INFO L93 Difference]: Finished difference Result 296 states and 337 transitions. [2021-11-20 07:01:22,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:01:22,778 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 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 97 [2021-11-20 07:01:22,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:01:22,779 INFO L225 Difference]: With dead ends: 296 [2021-11-20 07:01:22,779 INFO L226 Difference]: Without dead ends: 135 [2021-11-20 07:01:22,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:01:22,781 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 385 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:01:22,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 39 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:01:22,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-20 07:01:22,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 116. [2021-11-20 07:01:22,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 115 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 07:01:22,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2021-11-20 07:01:22,793 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 97 [2021-11-20 07:01:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:01:22,794 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2021-11-20 07:01:22,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 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 07:01:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2021-11-20 07:01:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-20 07:01:22,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:01:22,795 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:01:22,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:01:23,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 07:01:23,009 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:01:23,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:01:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1433123212, now seen corresponding path program 9 times [2021-11-20 07:01:23,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:01:23,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297893078] [2021-11-20 07:01:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:01:23,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:01:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 4 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:01:31,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:01:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297893078] [2021-11-20 07:01:31,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297893078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:01:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248345974] [2021-11-20 07:01:31,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:01:31,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:31,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:01:31,396 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:01:31,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:01:31,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 07:01:31,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:01:31,538 WARN L261 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 183 conjunts are in the unsatisfiable core [2021-11-20 07:01:31,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:01:31,699 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 07:01:41,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:41,189 INFO L354 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2021-11-20 07:01:41,189 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 81 treesize of output 63 [2021-11-20 07:01:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 7 proven. 160 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:01:41,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:01:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:01:57,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248345974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:01:57,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:01:57,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 26, 23] total 114 [2021-11-20 07:01:57,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236841609] [2021-11-20 07:01:57,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:01:57,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-20 07:01:57,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:01:57,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-20 07:01:57,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=12130, Unknown=0, NotChecked=0, Total=12882 [2021-11-20 07:01:57,887 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 114 states, 114 states have (on average 2.8508771929824563) internal successors, (325), 114 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 07:02:21,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:21,860 INFO L93 Difference]: Finished difference Result 296 states and 327 transitions. [2021-11-20 07:02:21,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-11-20 07:02:21,861 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.8508771929824563) internal successors, (325), 114 states have internal predecessors, (325), 0 states have call successors, (0), 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 115 [2021-11-20 07:02:21,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:21,864 INFO L225 Difference]: With dead ends: 296 [2021-11-20 07:02:21,864 INFO L226 Difference]: Without dead ends: 292 [2021-11-20 07:02:21,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 177 SyntacticMatches, 38 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 15192 ImplicationChecksByTransitivity, 40.8s TimeCoverageRelationStatistics Valid=2732, Invalid=41158, Unknown=0, NotChecked=0, Total=43890 [2021-11-20 07:02:21,870 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 84 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 2925 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 5276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 2925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1819 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:21,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 293 Invalid, 5276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 2925 Invalid, 0 Unknown, 1819 Unchecked, 2.8s Time] [2021-11-20 07:02:21,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-20 07:02:21,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 237. [2021-11-20 07:02:21,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.1101694915254237) internal successors, (262), 236 states have internal predecessors, (262), 0 states have call successors, (0), 0 states 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 07:02:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 262 transitions. [2021-11-20 07:02:21,906 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 262 transitions. Word has length 115 [2021-11-20 07:02:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:21,907 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 262 transitions. [2021-11-20 07:02:21,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.8508771929824563) internal successors, (325), 114 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 07:02:21,908 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 262 transitions. [2021-11-20 07:02:21,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 07:02:21,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:21,910 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:21,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:22,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 07:02:22,125 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:02:22,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:22,126 INFO L85 PathProgramCache]: Analyzing trace with hash 154504470, now seen corresponding path program 10 times [2021-11-20 07:02:22,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:22,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646335372] [2021-11-20 07:02:22,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:22,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 07:02:22,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:22,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646335372] [2021-11-20 07:02:22,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646335372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:22,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416510394] [2021-11-20 07:02:22,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:02:22,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:22,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:22,283 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:22,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:02:22,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:02:22,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:02:22,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:02:22,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 07:02:22,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 07:02:23,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416510394] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:23,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:02:23,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-11-20 07:02:23,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305410553] [2021-11-20 07:02:23,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:23,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:02:23,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:23,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:02:23,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:02:23,102 INFO L87 Difference]: Start difference. First operand 237 states and 262 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 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 07:02:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:23,683 INFO L93 Difference]: Finished difference Result 471 states and 519 transitions. [2021-11-20 07:02:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:02:23,683 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 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 117 [2021-11-20 07:02:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:23,685 INFO L225 Difference]: With dead ends: 471 [2021-11-20 07:02:23,685 INFO L226 Difference]: Without dead ends: 204 [2021-11-20 07:02:23,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:02:23,687 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 147 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:23,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 97 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:02:23,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-20 07:02:23,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2021-11-20 07:02:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.099009900990099) internal successors, (222), 202 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 07:02:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 222 transitions. [2021-11-20 07:02:23,709 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 222 transitions. Word has length 117 [2021-11-20 07:02:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:23,709 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 222 transitions. [2021-11-20 07:02:23,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 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 07:02:23,710 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 222 transitions. [2021-11-20 07:02:23,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 07:02:23,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:23,711 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:23,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:23,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:02:23,925 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:02:23,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:23,926 INFO L85 PathProgramCache]: Analyzing trace with hash -2097901128, now seen corresponding path program 11 times [2021-11-20 07:02:23,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:23,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898492640] [2021-11-20 07:02:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:23,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:02:24,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:24,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898492640] [2021-11-20 07:02:24,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898492640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:24,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712157456] [2021-11-20 07:02:24,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:02:24,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:24,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:24,096 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:24,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:02:24,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 07:02:24,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:02:24,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:02:24,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:02:24,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:02:25,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712157456] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:25,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:02:25,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2021-11-20 07:02:25,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495182859] [2021-11-20 07:02:25,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:25,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 07:02:25,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:25,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 07:02:25,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:02:25,206 INFO L87 Difference]: Start difference. First operand 203 states and 222 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 07:02:25,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:25,901 INFO L93 Difference]: Finished difference Result 317 states and 353 transitions. [2021-11-20 07:02:25,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:02:25,901 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-11-20 07:02:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:25,902 INFO L225 Difference]: With dead ends: 317 [2021-11-20 07:02:25,902 INFO L226 Difference]: Without dead ends: 148 [2021-11-20 07:02:25,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2021-11-20 07:02:25,903 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 391 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:25,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 48 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:02:25,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-20 07:02:25,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2021-11-20 07:02:25,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 07:02:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2021-11-20 07:02:25,918 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 119 [2021-11-20 07:02:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:25,918 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2021-11-20 07:02:25,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 07:02:25,919 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2021-11-20 07:02:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 07:02:25,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:25,921 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:25,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:26,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 07:02:26,145 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:02:26,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:26,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1639815466, now seen corresponding path program 12 times [2021-11-20 07:02:26,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:26,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050091799] [2021-11-20 07:02:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:26,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 14 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:02:36,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:36,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050091799] [2021-11-20 07:02:36,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050091799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:36,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921050027] [2021-11-20 07:02:36,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:02:36,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:36,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:36,512 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:36,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:02:36,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-20 07:02:36,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:02:36,609 WARN L261 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 229 conjunts are in the unsatisfiable core [2021-11-20 07:02:36,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:36,765 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 07:02:45,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:02:45,531 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 43 treesize of output 31 [2021-11-20 07:02:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 3 proven. 271 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:02:45,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:03:06,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921050027] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:03:06,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:03:06,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 33, 27] total 134 [2021-11-20 07:03:06,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757114493] [2021-11-20 07:03:06,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:06,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2021-11-20 07:03:06,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:06,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-11-20 07:03:06,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=16923, Unknown=0, NotChecked=0, Total=17822 [2021-11-20 07:03:06,511 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 134 states, 134 states have (on average 2.8507462686567164) internal successors, (382), 134 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 07:03:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:30,996 INFO L93 Difference]: Finished difference Result 338 states and 368 transitions. [2021-11-20 07:03:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-11-20 07:03:30,996 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.8507462686567164) internal successors, (382), 134 states have internal predecessors, (382), 0 states have call successors, (0), 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 137 [2021-11-20 07:03:30,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:30,998 INFO L225 Difference]: With dead ends: 338 [2021-11-20 07:03:30,998 INFO L226 Difference]: Without dead ends: 334 [2021-11-20 07:03:31,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 202 SyntacticMatches, 63 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 23036 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=3103, Invalid=52829, Unknown=0, NotChecked=0, Total=55932 [2021-11-20 07:03:31,002 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 60 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 3672 mSolverCounterSat, 615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 6884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 3672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2597 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:31,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 275 Invalid, 6884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [615 Valid, 3672 Invalid, 0 Unknown, 2597 Unchecked, 3.1s Time] [2021-11-20 07:03:31,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-20 07:03:31,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 265. [2021-11-20 07:03:31,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0871212121212122) internal successors, (287), 264 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 07:03:31,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 287 transitions. [2021-11-20 07:03:31,034 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 287 transitions. Word has length 137 [2021-11-20 07:03:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:31,035 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 287 transitions. [2021-11-20 07:03:31,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.8507462686567164) internal successors, (382), 134 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 07:03:31,035 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 287 transitions. [2021-11-20 07:03:31,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-20 07:03:31,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:31,037 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:31,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-20 07:03:31,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:31,247 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:03:31,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:31,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1220040116, now seen corresponding path program 13 times [2021-11-20 07:03:31,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:31,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112703063] [2021-11-20 07:03:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:31,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-20 07:03:31,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:31,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112703063] [2021-11-20 07:03:31,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112703063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:31,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265117571] [2021-11-20 07:03:31,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:03:31,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:31,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:31,411 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:31,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:03:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:31,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:03:31,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-20 07:03:31,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-20 07:03:32,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265117571] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:03:32,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:03:32,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-20 07:03:32,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303896345] [2021-11-20 07:03:32,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:32,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 07:03:32,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:32,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 07:03:32,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:03:32,220 INFO L87 Difference]: Start difference. First operand 265 states and 287 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 07:03:32,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:32,857 INFO L93 Difference]: Finished difference Result 541 states and 585 transitions. [2021-11-20 07:03:32,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:03:32,858 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 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 139 [2021-11-20 07:03:32,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:32,860 INFO L225 Difference]: With dead ends: 541 [2021-11-20 07:03:32,860 INFO L226 Difference]: Without dead ends: 242 [2021-11-20 07:03:32,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-11-20 07:03:32,861 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 153 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:32,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 132 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:03:32,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-20 07:03:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2021-11-20 07:03:32,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0833333333333333) internal successors, (260), 240 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 07:03:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 260 transitions. [2021-11-20 07:03:32,896 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 260 transitions. Word has length 139 [2021-11-20 07:03:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:32,897 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 260 transitions. [2021-11-20 07:03:32,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 07:03:32,897 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 260 transitions. [2021-11-20 07:03:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 07:03:32,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:32,899 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:32,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:33,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:33,125 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:03:33,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:33,125 INFO L85 PathProgramCache]: Analyzing trace with hash -2121356946, now seen corresponding path program 14 times [2021-11-20 07:03:33,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:33,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415579474] [2021-11-20 07:03:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:33,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-20 07:03:33,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:33,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415579474] [2021-11-20 07:03:33,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415579474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:33,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926016186] [2021-11-20 07:03:33,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:03:33,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:33,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:33,283 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:33,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:03:33,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:03:33,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:03:33,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:03:33,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-20 07:03:33,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-20 07:03:34,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926016186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:03:34,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:03:34,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-20 07:03:34,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145423196] [2021-11-20 07:03:34,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:34,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 07:03:34,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:34,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 07:03:34,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:03:34,093 INFO L87 Difference]: Start difference. First operand 241 states and 260 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 07:03:34,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:34,610 INFO L93 Difference]: Finished difference Result 371 states and 407 transitions. [2021-11-20 07:03:34,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:03:34,611 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 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 141 [2021-11-20 07:03:34,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:34,612 INFO L225 Difference]: With dead ends: 371 [2021-11-20 07:03:34,612 INFO L226 Difference]: Without dead ends: 170 [2021-11-20 07:03:34,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 272 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-11-20 07:03:34,613 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 253 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:34,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 54 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:03:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-20 07:03:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2021-11-20 07:03:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.069182389937107) internal successors, (170), 159 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 07:03:34,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2021-11-20 07:03:34,630 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 141 [2021-11-20 07:03:34,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:34,630 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2021-11-20 07:03:34,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 07:03:34,631 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2021-11-20 07:03:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-20 07:03:34,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:34,632 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:34,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:34,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:03:34,850 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:03:34,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:34,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1284366496, now seen corresponding path program 15 times [2021-11-20 07:03:34,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:34,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609891517] [2021-11-20 07:03:34,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:34,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:03:49,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:49,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609891517] [2021-11-20 07:03:49,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609891517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:49,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651720792] [2021-11-20 07:03:49,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:03:49,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:49,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:49,267 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:49,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:03:49,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-20 07:03:49,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:03:49,435 WARN L261 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 271 conjunts are in the unsatisfiable core [2021-11-20 07:03:49,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:49,652 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 07:04:14,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:14,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:14,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:14,371 INFO L354 Elim1Store]: treesize reduction 98, result has 44.6 percent of original size [2021-11-20 07:04:14,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 117 treesize of output 107 [2021-11-20 07:04:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 7 proven. 380 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:04:15,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 07:04:47,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651720792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:04:47,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:04:47,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 36, 31] total 153 [2021-11-20 07:04:47,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442682047] [2021-11-20 07:04:47,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:04:47,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2021-11-20 07:04:47,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:04:47,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2021-11-20 07:04:47,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=969, Invalid=22286, Unknown=1, NotChecked=0, Total=23256 [2021-11-20 07:04:47,419 INFO L87 Difference]: Start difference. First operand 160 states and 170 transitions. Second operand has 153 states, 153 states have (on average 2.934640522875817) internal successors, (449), 153 states have internal predecessors, (449), 0 states have call successors, (0), 0 states 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 07:05:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:05:17,715 INFO L93 Difference]: Finished difference Result 292 states and 311 transitions. [2021-11-20 07:05:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-20 07:05:17,716 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 2.934640522875817) internal successors, (449), 153 states have internal predecessors, (449), 0 states have call successors, (0), 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 159 [2021-11-20 07:05:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:05:17,717 INFO L225 Difference]: With dead ends: 292 [2021-11-20 07:05:17,717 INFO L226 Difference]: Without dead ends: 288 [2021-11-20 07:05:17,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 260 SyntacticMatches, 55 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16396 ImplicationChecksByTransitivity, 75.5s TimeCoverageRelationStatistics Valid=2383, Invalid=52606, Unknown=1, NotChecked=0, Total=54990 [2021-11-20 07:05:17,720 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4832 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 7297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 4832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2122 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:05:17,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 321 Invalid, 7297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 4832 Invalid, 0 Unknown, 2122 Unchecked, 4.7s Time] [2021-11-20 07:05:17,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-20 07:05:17,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 277. [2021-11-20 07:05:17,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.0724637681159421) internal successors, (296), 276 states have internal predecessors, (296), 0 states have call successors, (0), 0 states 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 07:05:17,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 296 transitions. [2021-11-20 07:05:17,753 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 296 transitions. Word has length 159 [2021-11-20 07:05:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:05:17,754 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 296 transitions. [2021-11-20 07:05:17,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 2.934640522875817) internal successors, (449), 153 states have internal predecessors, (449), 0 states have call successors, (0), 0 states 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 07:05:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 296 transitions. [2021-11-20 07:05:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-20 07:05:17,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:05:17,756 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:05:17,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-20 07:05:17,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 07:05:17,973 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:05:17,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:05:17,973 INFO L85 PathProgramCache]: Analyzing trace with hash 762190594, now seen corresponding path program 16 times [2021-11-20 07:05:17,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:05:17,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176481163] [2021-11-20 07:05:17,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:05:17,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:05:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:05:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-20 07:05:18,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:05:18,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176481163] [2021-11-20 07:05:18,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176481163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:05:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352832738] [2021-11-20 07:05:18,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:05:18,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:05:18,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:05:18,206 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:05:18,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:05:18,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:05:18,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:05:18,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 07:05:18,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:05:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-20 07:05:18,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:05:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-20 07:05:19,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352832738] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:05:19,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:05:19,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-11-20 07:05:19,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710555204] [2021-11-20 07:05:19,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:05:19,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 07:05:19,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:05:19,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 07:05:19,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:05:19,196 INFO L87 Difference]: Start difference. First operand 277 states and 296 transitions. Second operand has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 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 07:05:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:05:20,079 INFO L93 Difference]: Finished difference Result 552 states and 590 transitions. [2021-11-20 07:05:20,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:05:20,080 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 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 161 [2021-11-20 07:05:20,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:05:20,082 INFO L225 Difference]: With dead ends: 552 [2021-11-20 07:05:20,082 INFO L226 Difference]: Without dead ends: 280 [2021-11-20 07:05:20,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 07:05:20,084 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 200 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:05:20,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 133 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:05:20,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-20 07:05:20,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 279. [2021-11-20 07:05:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.0719424460431655) internal successors, (298), 278 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 07:05:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 298 transitions. [2021-11-20 07:05:20,122 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 298 transitions. Word has length 161 [2021-11-20 07:05:20,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:05:20,123 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 298 transitions. [2021-11-20 07:05:20,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 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 07:05:20,123 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 298 transitions. [2021-11-20 07:05:20,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-20 07:05:20,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:05:20,125 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:05:20,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:05:20,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:05:20,353 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:05:20,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:05:20,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1586350940, now seen corresponding path program 17 times [2021-11-20 07:05:20,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:05:20,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646793400] [2021-11-20 07:05:20,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:05:20,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:05:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:05:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-20 07:05:20,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:05:20,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646793400] [2021-11-20 07:05:20,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646793400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:05:20,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595305888] [2021-11-20 07:05:20,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:05:20,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:05:20,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:05:20,545 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:05:20,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:05:20,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-20 07:05:20,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:05:20,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 07:05:20,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:05:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-20 07:05:21,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:05:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-20 07:05:21,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595305888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:05:21,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:05:21,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-11-20 07:05:21,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005297223] [2021-11-20 07:05:21,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:05:21,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 07:05:21,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:05:21,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 07:05:21,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:05:21,694 INFO L87 Difference]: Start difference. First operand 279 states and 298 transitions. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 07:05:22,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:05:22,280 INFO L93 Difference]: Finished difference Result 425 states and 461 transitions. [2021-11-20 07:05:22,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:05:22,280 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 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 163 [2021-11-20 07:05:22,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:05:22,283 INFO L225 Difference]: With dead ends: 425 [2021-11-20 07:05:22,283 INFO L226 Difference]: Without dead ends: 192 [2021-11-20 07:05:22,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 315 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=347, Invalid=843, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 07:05:22,284 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 445 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:05:22,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 50 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:05:22,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-20 07:05:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 182. [2021-11-20 07:05:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.0607734806629834) internal successors, (192), 181 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 07:05:22,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 192 transitions. [2021-11-20 07:05:22,307 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 192 transitions. Word has length 163 [2021-11-20 07:05:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:05:22,307 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 192 transitions. [2021-11-20 07:05:22,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 07:05:22,308 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 192 transitions. [2021-11-20 07:05:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-20 07:05:22,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:05:22,309 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:05:22,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:05:22,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:05:22,533 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:05:22,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:05:22,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1507735830, now seen corresponding path program 18 times [2021-11-20 07:05:22,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:05:22,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437806403] [2021-11-20 07:05:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:05:22,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:05:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:05:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 53 proven. 486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:05:42,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:05:42,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437806403] [2021-11-20 07:05:42,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437806403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:05:42,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990601540] [2021-11-20 07:05:42,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:05:42,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:05:42,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:05:42,380 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:05:42,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 07:05:42,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-20 07:05:42,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:05:42,559 WARN L261 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 308 conjunts are in the unsatisfiable core [2021-11-20 07:05:42,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:10,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:10,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:10,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:10,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:10,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:10,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:10,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:10,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:10,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:10,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:11,967 INFO L354 Elim1Store]: treesize reduction 951, result has 36.8 percent of original size [2021-11-20 07:06:11,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 13 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 279 treesize of output 608 [2021-11-20 07:06:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 13 proven. 490 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 07:06:29,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:07:03,091 INFO L354 Elim1Store]: treesize reduction 1183, result has 20.9 percent of original size [2021-11-20 07:07:03,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 289 treesize of output 371 [2021-11-20 07:08:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 503 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 07:08:09,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990601540] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:08:09,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:08:09,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 38, 36] total 178 [2021-11-20 07:08:09,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872878837] [2021-11-20 07:08:09,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:08:09,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2021-11-20 07:08:09,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:09,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2021-11-20 07:08:09,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1732, Invalid=29774, Unknown=0, NotChecked=0, Total=31506 [2021-11-20 07:08:09,758 INFO L87 Difference]: Start difference. First operand 182 states and 192 transitions. Second operand has 178 states, 178 states have (on average 2.859550561797753) internal successors, (509), 178 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 07:09:39,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:39,818 INFO L93 Difference]: Finished difference Result 431 states and 463 transitions. [2021-11-20 07:09:39,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2021-11-20 07:09:39,819 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 2.859550561797753) internal successors, (509), 178 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) Word has length 181 [2021-11-20 07:09:39,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:39,822 INFO L225 Difference]: With dead ends: 431 [2021-11-20 07:09:39,822 INFO L226 Difference]: Without dead ends: 427 [2021-11-20 07:09:39,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 298 SyntacticMatches, 64 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 40122 ImplicationChecksByTransitivity, 136.3s TimeCoverageRelationStatistics Valid=5978, Invalid=100624, Unknown=0, NotChecked=0, Total=106602 [2021-11-20 07:09:39,828 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 99 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 5292 mSolverCounterSat, 995 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 11444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 995 IncrementalHoareTripleChecker+Valid, 5292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5157 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:39,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 356 Invalid, 11444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [995 Valid, 5292 Invalid, 0 Unknown, 5157 Unchecked, 5.5s Time] [2021-11-20 07:09:39,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-20 07:09:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 349. [2021-11-20 07:09:39,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.0660919540229885) internal successors, (371), 348 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 07:09:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 371 transitions. [2021-11-20 07:09:39,879 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 371 transitions. Word has length 181 [2021-11-20 07:09:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:39,880 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 371 transitions. [2021-11-20 07:09:39,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 178 states have (on average 2.859550561797753) internal successors, (509), 178 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 07:09:39,881 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 371 transitions. [2021-11-20 07:09:39,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-20 07:09:39,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:39,883 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:39,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:09:40,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:40,109 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:40,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:40,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1338163400, now seen corresponding path program 19 times [2021-11-20 07:09:40,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:40,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268811019] [2021-11-20 07:09:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:40,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-20 07:09:40,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:09:40,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268811019] [2021-11-20 07:09:40,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268811019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:09:40,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700872001] [2021-11-20 07:09:40,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:09:40,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:40,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:09:40,409 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:09:40,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 07:09:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:40,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:09:40,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-20 07:09:41,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:09:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-20 07:09:41,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700872001] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:09:41,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:09:41,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-11-20 07:09:41,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540933719] [2021-11-20 07:09:41,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:09:41,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 07:09:41,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:09:41,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 07:09:41,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2021-11-20 07:09:41,713 INFO L87 Difference]: Start difference. First operand 349 states and 371 transitions. Second operand has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 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 07:09:42,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:42,769 INFO L93 Difference]: Finished difference Result 713 states and 757 transitions. [2021-11-20 07:09:42,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:09:42,772 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 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 183 [2021-11-20 07:09:42,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:42,774 INFO L225 Difference]: With dead ends: 713 [2021-11-20 07:09:42,774 INFO L226 Difference]: Without dead ends: 318 [2021-11-20 07:09:42,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 07:09:42,776 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 198 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:42,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 135 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1569 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:09:42,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-20 07:09:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 317. [2021-11-20 07:09:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.0632911392405062) internal successors, (336), 316 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 07:09:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 336 transitions. [2021-11-20 07:09:42,819 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 336 transitions. Word has length 183 [2021-11-20 07:09:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:42,819 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 336 transitions. [2021-11-20 07:09:42,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 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 07:09:42,820 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 336 transitions. [2021-11-20 07:09:42,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-20 07:09:42,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:42,822 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:42,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 07:09:43,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:43,045 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:43,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:43,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1419481946, now seen corresponding path program 20 times [2021-11-20 07:09:43,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:43,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023229327] [2021-11-20 07:09:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:43,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2021-11-20 07:09:43,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:09:43,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023229327] [2021-11-20 07:09:43,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023229327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:09:43,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587167012] [2021-11-20 07:09:43,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:09:43,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:43,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:09:43,305 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:09:43,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 07:09:43,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:09:43,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:09:43,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:09:43,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2021-11-20 07:09:43,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:09:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2021-11-20 07:09:44,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587167012] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:09:44,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:09:44,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-11-20 07:09:44,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851836278] [2021-11-20 07:09:44,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:09:44,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 07:09:44,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:09:44,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 07:09:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-11-20 07:09:44,290 INFO L87 Difference]: Start difference. First operand 317 states and 336 transitions. Second operand has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 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 07:09:45,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:45,014 INFO L93 Difference]: Finished difference Result 479 states and 515 transitions. [2021-11-20 07:09:45,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:09:45,015 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 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 185 [2021-11-20 07:09:45,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:45,016 INFO L225 Difference]: With dead ends: 479 [2021-11-20 07:09:45,016 INFO L226 Difference]: Without dead ends: 214 [2021-11-20 07:09:45,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 358 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=430, Invalid=1052, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 07:09:45,017 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 536 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:45,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 49 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:09:45,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-20 07:09:45,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 204. [2021-11-20 07:09:45,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 203 states have internal predecessors, (214), 0 states have call successors, (0), 0 states 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 07:09:45,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 214 transitions. [2021-11-20 07:09:45,049 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 214 transitions. Word has length 185 [2021-11-20 07:09:45,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:45,050 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 214 transitions. [2021-11-20 07:09:45,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 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 07:09:45,050 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 214 transitions. [2021-11-20 07:09:45,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-20 07:09:45,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:45,052 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:45,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 07:09:45,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 07:09:45,274 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:45,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:45,275 INFO L85 PathProgramCache]: Analyzing trace with hash -442087860, now seen corresponding path program 21 times [2021-11-20 07:09:45,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:45,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021691044] [2021-11-20 07:09:45,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:45,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 58 proven. 646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:10:26,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:26,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021691044] [2021-11-20 07:10:26,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021691044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:10:26,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633951148] [2021-11-20 07:10:26,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:10:26,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:26,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:26,554 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:26,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c897d6e-3266-4749-9a02-8d8fbdaa4be8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 07:10:26,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-20 07:10:26,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:10:26,800 WARN L261 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 355 conjunts are in the unsatisfiable core [2021-11-20 07:10:26,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:27,193 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 07:11:30,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:11:30,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:11:30,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:11:30,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:11:30,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:11:30,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:11:31,363 INFO L354 Elim1Store]: treesize reduction 693, result has 38.9 percent of original size [2021-11-20 07:11:31,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 9 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 243 treesize of output 492 [2021-11-20 07:11:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 9 proven. 679 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:11:44,076 INFO L328 TraceCheckSpWp]: Computing backward predicates...