./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array25_pattern.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_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/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_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array25_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/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_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/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 d5acc4e7957d3ad66d9b011b6d1c27cdde7a453adaa0d9781357dfd70a9cc20a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:26:02,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:26:02,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:26:02,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:26:02,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:26:02,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:26:02,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:26:02,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:26:02,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:26:02,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:26:02,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:26:02,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:26:02,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:26:02,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:26:02,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:26:02,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:26:02,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:26:02,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:26:02,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:26:02,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:26:02,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:26:02,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:26:02,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:26:02,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:26:02,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:26:02,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:26:02,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:26:02,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:26:02,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:26:02,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:26:02,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:26:02,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:26:02,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:26:02,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:26:02,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:26:02,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:26:02,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:26:02,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:26:02,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:26:02,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:26:02,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:26:02,901 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:26:02,943 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:26:02,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:26:02,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:26:02,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:26:02,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:26:02,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:26:02,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:26:02,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:26:02,945 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:26:02,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:26:02,946 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:26:02,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:26:02,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:26:02,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:26:02,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:26:02,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:26:02,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:26:02,947 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:26:02,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:26:02,947 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:26:02,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:26:02,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:26:02,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:26:02,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:26:02,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:26:02,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:26:02,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:26:02,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:26:02,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:26:02,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:26:02,949 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:26:02,949 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:26:02,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:26:02,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:26:02,950 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_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5acc4e7957d3ad66d9b011b6d1c27cdde7a453adaa0d9781357dfd70a9cc20a [2021-11-20 07:26:03,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:26:03,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:26:03,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:26:03,240 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:26:03,241 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:26:03,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-patterns/array25_pattern.c [2021-11-20 07:26:03,322 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/data/9b645c556/e483c0871e624d8ea7aafbd0ae3ef0c7/FLAG9e0995058 [2021-11-20 07:26:03,886 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:26:03,888 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/sv-benchmarks/c/array-patterns/array25_pattern.c [2021-11-20 07:26:03,900 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/data/9b645c556/e483c0871e624d8ea7aafbd0ae3ef0c7/FLAG9e0995058 [2021-11-20 07:26:04,234 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/data/9b645c556/e483c0871e624d8ea7aafbd0ae3ef0c7 [2021-11-20 07:26:04,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:26:04,239 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:26:04,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:26:04,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:26:04,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:26:04,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:26:04" (1/1) ... [2021-11-20 07:26:04,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64cf2171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:04, skipping insertion in model container [2021-11-20 07:26:04,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:26:04" (1/1) ... [2021-11-20 07:26:04,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:26:04,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:26:04,487 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_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/sv-benchmarks/c/array-patterns/array25_pattern.c[1270,1283] [2021-11-20 07:26:04,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:26:04,514 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:26:04,527 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_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/sv-benchmarks/c/array-patterns/array25_pattern.c[1270,1283] [2021-11-20 07:26:04,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:26:04,551 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:26:04,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:04 WrapperNode [2021-11-20 07:26:04,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:26:04,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:26:04,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:26:04,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:26:04,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:04" (1/1) ... [2021-11-20 07:26:04,592 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:04" (1/1) ... [2021-11-20 07:26:04,631 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2021-11-20 07:26:04,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:26:04,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:26:04,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:26:04,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:26:04,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:04" (1/1) ... [2021-11-20 07:26:04,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:04" (1/1) ... [2021-11-20 07:26:04,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:04" (1/1) ... [2021-11-20 07:26:04,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:04" (1/1) ... [2021-11-20 07:26:04,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:04" (1/1) ... [2021-11-20 07:26:04,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:04" (1/1) ... [2021-11-20 07:26:04,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:04" (1/1) ... [2021-11-20 07:26:04,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:26:04,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:26:04,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:26:04,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:26:04,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:04" (1/1) ... [2021-11-20 07:26:04,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:26:04,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:04,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:26:04,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:26:04,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:26:04,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:26:04,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:26:04,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:26:04,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:26:04,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:26:04,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:26:04,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:26:04,897 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:26:04,899 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:26:05,144 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:26:05,169 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:26:05,169 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 07:26:05,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:26:05 BoogieIcfgContainer [2021-11-20 07:26:05,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:26:05,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:26:05,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:26:05,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:26:05,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:26:04" (1/3) ... [2021-11-20 07:26:05,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0e9900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:26:05, skipping insertion in model container [2021-11-20 07:26:05,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:04" (2/3) ... [2021-11-20 07:26:05,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0e9900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:26:05, skipping insertion in model container [2021-11-20 07:26:05,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:26:05" (3/3) ... [2021-11-20 07:26:05,183 INFO L111 eAbstractionObserver]: Analyzing ICFG array25_pattern.c [2021-11-20 07:26:05,189 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:26:05,189 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:26:05,262 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:26:05,270 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:26:05,270 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:26:05,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:05,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 07:26:05,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:05,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:05,304 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:05,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:05,311 INFO L85 PathProgramCache]: Analyzing trace with hash -320975489, now seen corresponding path program 1 times [2021-11-20 07:26:05,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:05,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401181095] [2021-11-20 07:26:05,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:05,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:05,505 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 07:26:05,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:05,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401181095] [2021-11-20 07:26:05,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401181095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:26:05,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:26:05,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:26:05,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487893649] [2021-11-20 07:26:05,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:26:05,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:26:05,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:05,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:26:05,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:26:05,558 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 07:26:05,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:05,583 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2021-11-20 07:26:05,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:26:05,586 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-20 07:26:05,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:05,595 INFO L225 Difference]: With dead ends: 43 [2021-11-20 07:26:05,596 INFO L226 Difference]: Without dead ends: 19 [2021-11-20 07:26:05,600 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 07:26:05,605 INFO L933 BasicCegarLoop]: 28 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, 28 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 07:26:05,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:26:05,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-20 07:26:05,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-20 07:26:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-20 07:26:05,646 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-20 07:26:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:05,647 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-20 07:26:05,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 07:26:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-20 07:26:05,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 07:26:05,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:05,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:05,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:26:05,650 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:05,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:05,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1931938343, now seen corresponding path program 1 times [2021-11-20 07:26:05,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:05,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580025731] [2021-11-20 07:26:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:05,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:05,681 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:26:05,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535028946] [2021-11-20 07:26:05,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:05,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:05,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:05,693 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:05,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:26:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:05,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:26:05,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:05,879 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 07:26:05,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:26:05,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:05,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580025731] [2021-11-20 07:26:05,881 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:26:05,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535028946] [2021-11-20 07:26:05,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535028946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:26:05,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:26:05,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:26:05,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921771508] [2021-11-20 07:26:05,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:26:05,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:26:05,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:05,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:26:05,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:26:05,886 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 07:26:05,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:05,920 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-11-20 07:26:05,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:26:05,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-20 07:26:05,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:05,923 INFO L225 Difference]: With dead ends: 26 [2021-11-20 07:26:05,924 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 07:26:05,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:26:05,927 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:05,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:26:05,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 07:26:05,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-20 07:26:05,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:05,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-20 07:26:05,936 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2021-11-20 07:26:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:05,940 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-20 07:26:05,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 07:26:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-20 07:26:05,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 07:26:05,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:05,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:05,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:06,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:06,168 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:06,169 INFO L85 PathProgramCache]: Analyzing trace with hash -94215630, now seen corresponding path program 1 times [2021-11-20 07:26:06,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:06,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23516430] [2021-11-20 07:26:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:06,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:06,181 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:26:06,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583623277] [2021-11-20 07:26:06,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:06,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:06,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:06,184 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:06,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:26:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:06,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:26:06,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:26:06,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:26:06,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:06,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23516430] [2021-11-20 07:26:06,370 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:26:06,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583623277] [2021-11-20 07:26:06,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583623277] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:26:06,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:26:06,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:26:06,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104853342] [2021-11-20 07:26:06,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:26:06,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:26:06,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:06,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:26:06,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:26:06,373 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:06,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:06,504 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2021-11-20 07:26:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:26:06,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 07:26:06,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:06,506 INFO L225 Difference]: With dead ends: 54 [2021-11-20 07:26:06,506 INFO L226 Difference]: Without dead ends: 34 [2021-11-20 07:26:06,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:26:06,508 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:06,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 31 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:26:06,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-20 07:26:06,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-11-20 07:26:06,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:06,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2021-11-20 07:26:06,529 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 15 [2021-11-20 07:26:06,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:06,529 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2021-11-20 07:26:06,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:06,530 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2021-11-20 07:26:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 07:26:06,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:06,531 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:06,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:06,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:06,732 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:06,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:06,733 INFO L85 PathProgramCache]: Analyzing trace with hash -169454663, now seen corresponding path program 1 times [2021-11-20 07:26:06,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:06,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591269244] [2021-11-20 07:26:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:06,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:06,743 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:26:06,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651874214] [2021-11-20 07:26:06,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:06,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:06,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:06,745 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:06,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:26:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:06,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:26:06,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:26:06,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:26:06,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:06,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591269244] [2021-11-20 07:26:06,884 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:26:06,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651874214] [2021-11-20 07:26:06,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651874214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:26:06,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:26:06,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:26:06,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597302615] [2021-11-20 07:26:06,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:26:06,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:26:06,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:06,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:26:06,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:26:06,887 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:06,969 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2021-11-20 07:26:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:26:06,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 07:26:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:06,971 INFO L225 Difference]: With dead ends: 54 [2021-11-20 07:26:06,973 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 07:26:06,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:26:06,976 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:06,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 16 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:26:06,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 07:26:06,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-11-20 07:26:06,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-11-20 07:26:07,000 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 18 [2021-11-20 07:26:07,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:07,001 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-11-20 07:26:07,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:07,001 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-11-20 07:26:07,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 07:26:07,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:07,005 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] [2021-11-20 07:26:07,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:07,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:07,228 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:07,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:07,228 INFO L85 PathProgramCache]: Analyzing trace with hash -308201553, now seen corresponding path program 1 times [2021-11-20 07:26:07,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:07,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031304982] [2021-11-20 07:26:07,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:07,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:07,239 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:26:07,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901041465] [2021-11-20 07:26:07,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:07,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:07,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:07,240 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:07,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:26:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:07,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:26:07,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:26:07,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:26:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:26:07,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:07,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031304982] [2021-11-20 07:26:07,586 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:26:07,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901041465] [2021-11-20 07:26:07,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901041465] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:26:07,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:26:07,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-20 07:26:07,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960919172] [2021-11-20 07:26:07,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:26:07,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:26:07,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:07,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:26:07,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:26:07,592 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:07,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:07,793 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2021-11-20 07:26:07,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:26:07,793 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 07:26:07,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:07,797 INFO L225 Difference]: With dead ends: 65 [2021-11-20 07:26:07,798 INFO L226 Difference]: Without dead ends: 45 [2021-11-20 07:26:07,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:26:07,801 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 112 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:07,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 22 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:26:07,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-20 07:26:07,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-11-20 07:26:07,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 07:26:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-11-20 07:26:07,824 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 21 [2021-11-20 07:26:07,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:07,826 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-11-20 07:26:07,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:07,827 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-11-20 07:26:07,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 07:26:07,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:07,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:07,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:08,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:08,056 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:08,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:08,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1610723178, now seen corresponding path program 1 times [2021-11-20 07:26:08,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:08,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750883890] [2021-11-20 07:26:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:08,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:08,067 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:26:08,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297050610] [2021-11-20 07:26:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:08,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:08,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:08,068 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:08,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:26:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:08,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:26:08,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:26:08,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:26:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:26:08,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:08,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750883890] [2021-11-20 07:26:08,350 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:26:08,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297050610] [2021-11-20 07:26:08,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297050610] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:26:08,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:26:08,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-20 07:26:08,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434425660] [2021-11-20 07:26:08,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:26:08,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:26:08,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:08,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:26:08,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:26:08,353 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 07:26:08,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:08,780 INFO L93 Difference]: Finished difference Result 113 states and 152 transitions. [2021-11-20 07:26:08,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:26:08,780 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 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 07:26:08,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:08,781 INFO L225 Difference]: With dead ends: 113 [2021-11-20 07:26:08,782 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 07:26:08,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:26:08,783 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 66 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:08,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 43 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:26:08,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 07:26:08,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 67. [2021-11-20 07:26:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 66 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 07:26:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2021-11-20 07:26:08,809 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 27 [2021-11-20 07:26:08,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:08,810 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2021-11-20 07:26:08,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 07:26:08,810 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2021-11-20 07:26:08,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:26:08,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:08,813 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:08,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:09,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 07:26:09,040 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:09,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1943339208, now seen corresponding path program 1 times [2021-11-20 07:26:09,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:09,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133631395] [2021-11-20 07:26:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:09,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:09,052 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:26:09,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837074550] [2021-11-20 07:26:09,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:09,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:09,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:09,054 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:09,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:26:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:09,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-20 07:26:09,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:09,543 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 26 treesize of output 22 [2021-11-20 07:26:09,563 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 24 treesize of output 20 [2021-11-20 07:26:09,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:09,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:09,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 101 [2021-11-20 07:26:09,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:09,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 23 [2021-11-20 07:26:10,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:10,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 136 [2021-11-20 07:26:10,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 24 [2021-11-20 07:26:10,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:10,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 115 [2021-11-20 07:26:10,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:10,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 23 [2021-11-20 07:26:12,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:12,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:12,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:12,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:12,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:12,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:12,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:12,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:12,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:12,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:12,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 40 [2021-11-20 07:26:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:26:12,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:26:30,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:30,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 957 treesize of output 957 [2021-11-20 07:26:30,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2021-11-20 07:26:31,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 6 [2021-11-20 07:26:34,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 949 treesize of output 913 [2021-11-20 07:27:14,777 WARN L227 SmtUtils]: Spent 40.47s on a formula simplification. DAG size of input: 142 DAG size of output: 98 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 07:27:14,782 INFO L354 Elim1Store]: treesize reduction 260, result has 56.4 percent of original size [2021-11-20 07:27:14,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 2870987 treesize of output 2725886 [2021-11-20 07:27:22,900 WARN L227 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 3016 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 07:27:22,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:22,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133631395] [2021-11-20 07:27:22,965 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:27:22,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837074550] [2021-11-20 07:27:22,966 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 07:27:22,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:22,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-20 07:27:22,966 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-20 07:27:22,967 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-20 07:27:22,973 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 07:27:23,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:23,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:23,191 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:23,194 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 07:27:23,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:27:23 BoogieIcfgContainer [2021-11-20 07:27:23,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 07:27:23,223 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 07:27:23,223 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 07:27:23,224 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 07:27:23,224 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:26:05" (3/4) ... [2021-11-20 07:27:23,227 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 07:27:23,227 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 07:27:23,228 INFO L158 Benchmark]: Toolchain (without parser) took 78989.67ms. Allocated memory was 107.0MB in the beginning and 234.9MB in the end (delta: 127.9MB). Free memory was 68.8MB in the beginning and 112.6MB in the end (delta: -43.8MB). Peak memory consumption was 84.5MB. Max. memory is 16.1GB. [2021-11-20 07:27:23,228 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 107.0MB. Free memory is still 85.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:27:23,229 INFO L158 Benchmark]: CACSL2BoogieTranslator took 298.27ms. Allocated memory is still 107.0MB. Free memory was 68.6MB in the beginning and 82.8MB in the end (delta: -14.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 07:27:23,230 INFO L158 Benchmark]: Boogie Procedure Inliner took 82.38ms. Allocated memory is still 107.0MB. Free memory was 82.8MB in the beginning and 81.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:27:23,230 INFO L158 Benchmark]: Boogie Preprocessor took 62.04ms. Allocated memory is still 107.0MB. Free memory was 81.2MB in the beginning and 79.9MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 07:27:23,230 INFO L158 Benchmark]: RCFGBuilder took 473.24ms. Allocated memory is still 107.0MB. Free memory was 79.9MB in the beginning and 68.8MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 07:27:23,231 INFO L158 Benchmark]: TraceAbstraction took 78048.52ms. Allocated memory was 107.0MB in the beginning and 234.9MB in the end (delta: 127.9MB). Free memory was 68.6MB in the beginning and 112.6MB in the end (delta: -44.1MB). Peak memory consumption was 133.3MB. Max. memory is 16.1GB. [2021-11-20 07:27:23,231 INFO L158 Benchmark]: Witness Printer took 4.00ms. Allocated memory is still 234.9MB. Free memory is still 112.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:27:23,239 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 107.0MB. Free memory is still 85.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 298.27ms. Allocated memory is still 107.0MB. Free memory was 68.6MB in the beginning and 82.8MB in the end (delta: -14.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 82.38ms. Allocated memory is still 107.0MB. Free memory was 82.8MB in the beginning and 81.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 62.04ms. Allocated memory is still 107.0MB. Free memory was 81.2MB in the beginning and 79.9MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 473.24ms. Allocated memory is still 107.0MB. Free memory was 79.9MB in the beginning and 68.8MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 78048.52ms. Allocated memory was 107.0MB in the beginning and 234.9MB in the end (delta: 127.9MB). Free memory was 68.6MB in the beginning and 112.6MB in the end (delta: -44.1MB). Peak memory consumption was 133.3MB. Max. memory is 16.1GB. * Witness Printer took 4.00ms. Allocated memory is still 234.9MB. Free memory is still 112.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 33]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L37] signed long long ARR_SIZE ; [L41] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L42] CALL assume_abort_if_not(ARR_SIZE > 1) [L31] COND FALSE !(!cond) [L42] RET assume_abort_if_not(ARR_SIZE > 1) [L44] int array[ARR_SIZE][ARR_SIZE] ; [L46] int row = 0, column = 0, num = -1 ; [L47] signed long sum = 0 ; [L49] row=0 [L49] COND TRUE row main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/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 -> d5acc4e7957d3ad66d9b011b6d1c27cdde7a453adaa0d9781357dfd70a9cc20a [2021-11-20 07:27:26,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:27:26,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:27:26,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:27:26,575 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:27:26,576 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:27:26,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-patterns/array25_pattern.c [2021-11-20 07:27:26,664 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/data/5310c0bfb/7565d795d31543018add973217c6e810/FLAG3c7dece02 [2021-11-20 07:27:27,189 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:27:27,190 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/sv-benchmarks/c/array-patterns/array25_pattern.c [2021-11-20 07:27:27,197 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/data/5310c0bfb/7565d795d31543018add973217c6e810/FLAG3c7dece02 [2021-11-20 07:27:27,559 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/data/5310c0bfb/7565d795d31543018add973217c6e810 [2021-11-20 07:27:27,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:27:27,565 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:27:27,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:27:27,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:27:27,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:27:27,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:27:27" (1/1) ... [2021-11-20 07:27:27,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15b23b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:27, skipping insertion in model container [2021-11-20 07:27:27,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:27:27" (1/1) ... [2021-11-20 07:27:27,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:27:27,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:27:27,764 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_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/sv-benchmarks/c/array-patterns/array25_pattern.c[1270,1283] [2021-11-20 07:27:27,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:27:27,799 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:27:27,815 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_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/sv-benchmarks/c/array-patterns/array25_pattern.c[1270,1283] [2021-11-20 07:27:27,828 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:27:27,898 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:27:27,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:27 WrapperNode [2021-11-20 07:27:27,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:27:27,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:27:27,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:27:27,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:27:27,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:27" (1/1) ... [2021-11-20 07:27:27,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:27" (1/1) ... [2021-11-20 07:27:27,950 INFO L137 Inliner]: procedures = 18, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-11-20 07:27:27,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:27:27,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:27:27,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:27:27,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:27:27,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:27" (1/1) ... [2021-11-20 07:27:27,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:27" (1/1) ... [2021-11-20 07:27:27,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:27" (1/1) ... [2021-11-20 07:27:27,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:27" (1/1) ... [2021-11-20 07:27:27,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:27" (1/1) ... [2021-11-20 07:27:27,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:27" (1/1) ... [2021-11-20 07:27:27,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:27" (1/1) ... [2021-11-20 07:27:27,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:27:27,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:27:27,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:27:27,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:27:27,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:27" (1/1) ... [2021-11-20 07:27:27,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:27:28,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:28,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:27:28,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:27:28,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:27:28,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 07:27:28,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:27:28,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 07:27:28,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:27:28,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:27:28,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:27:28,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 07:27:28,140 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:27:28,142 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:27:28,426 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:27:28,433 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:27:28,433 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 07:27:28,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:27:28 BoogieIcfgContainer [2021-11-20 07:27:28,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:27:28,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:27:28,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:27:28,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:27:28,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:27:27" (1/3) ... [2021-11-20 07:27:28,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c99848a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:27:28, skipping insertion in model container [2021-11-20 07:27:28,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:27" (2/3) ... [2021-11-20 07:27:28,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c99848a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:27:28, skipping insertion in model container [2021-11-20 07:27:28,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:27:28" (3/3) ... [2021-11-20 07:27:28,444 INFO L111 eAbstractionObserver]: Analyzing ICFG array25_pattern.c [2021-11-20 07:27:28,449 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:27:28,449 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:27:28,500 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:27:28,508 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:27:28,508 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:27:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:28,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 07:27:28,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:28,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:28,539 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:28,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:28,545 INFO L85 PathProgramCache]: Analyzing trace with hash -320975489, now seen corresponding path program 1 times [2021-11-20 07:27:28,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:28,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530334536] [2021-11-20 07:27:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:28,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:28,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:28,560 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:28,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 07:27:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 07:27:28,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:28,693 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 07:27:28,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:28,725 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 07:27:28,726 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:28,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530334536] [2021-11-20 07:27:28,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530334536] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:28,727 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:28,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 07:27:28,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615898185] [2021-11-20 07:27:28,730 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:28,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:27:28,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:28,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:27:28,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:27:28,769 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 07:27:28,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:28,788 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2021-11-20 07:27:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:27:28,791 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-20 07:27:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:28,800 INFO L225 Difference]: With dead ends: 43 [2021-11-20 07:27:28,800 INFO L226 Difference]: Without dead ends: 19 [2021-11-20 07:27:28,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 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 07:27:28,808 INFO L933 BasicCegarLoop]: 28 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, 28 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 07:27:28,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:28,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-20 07:27:28,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-20 07:27:28,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-20 07:27:28,848 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-20 07:27:28,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:28,848 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-20 07:27:28,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 07:27:28,849 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-20 07:27:28,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 07:27:28,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:28,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:28,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:29,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:29,060 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:29,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:29,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1931938343, now seen corresponding path program 1 times [2021-11-20 07:27:29,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:29,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765337174] [2021-11-20 07:27:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:29,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:29,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:29,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:29,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 07:27:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:29,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:27:29,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:29,343 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 07:27:29,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:29,447 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 07:27:29,448 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:29,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765337174] [2021-11-20 07:27:29,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765337174] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:29,449 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:29,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-20 07:27:29,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857275001] [2021-11-20 07:27:29,450 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:29,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:27:29,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:29,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:27:29,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:27:29,453 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 07:27:29,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:29,518 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-11-20 07:27:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:27:29,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 10 [2021-11-20 07:27:29,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:29,520 INFO L225 Difference]: With dead ends: 26 [2021-11-20 07:27:29,520 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 07:27:29,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:27:29,525 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:29,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 73 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 07:27:29,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-20 07:27:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:29,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-20 07:27:29,533 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2021-11-20 07:27:29,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:29,534 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-20 07:27:29,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 07:27:29,534 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-20 07:27:29,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 07:27:29,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:29,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:29,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:29,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:29,749 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:29,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:29,750 INFO L85 PathProgramCache]: Analyzing trace with hash -94215630, now seen corresponding path program 1 times [2021-11-20 07:27:29,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:29,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543159925] [2021-11-20 07:27:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:29,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:29,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:29,754 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:29,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 07:27:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:29,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:27:29,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:30,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:30,475 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:30,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543159925] [2021-11-20 07:27:30,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543159925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:30,476 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:30,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 07:27:30,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795624070] [2021-11-20 07:27:30,477 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:30,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:27:30,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:30,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:27:30,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:27:30,479 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 07:27:30,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:30,672 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-11-20 07:27:30,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:27:30,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 07:27:30,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:30,674 INFO L225 Difference]: With dead ends: 35 [2021-11-20 07:27:30,674 INFO L226 Difference]: Without dead ends: 23 [2021-11-20 07:27:30,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:27:30,676 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:30,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2021-11-20 07:27:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-20 07:27:30,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-20 07:27:30,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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 07:27:30,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-11-20 07:27:30,683 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 15 [2021-11-20 07:27:30,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:30,683 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-11-20 07:27:30,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 07:27:30,684 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-11-20 07:27:30,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 07:27:30,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:30,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:30,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:30,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:30,896 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:30,897 INFO L85 PathProgramCache]: Analyzing trace with hash -169454663, now seen corresponding path program 1 times [2021-11-20 07:27:30,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:30,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081150861] [2021-11-20 07:27:30,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:30,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:30,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:30,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:30,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 07:27:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:31,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:27:31,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:31,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:31,475 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:31,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081150861] [2021-11-20 07:27:31,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081150861] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:31,476 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:31,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 07:27:31,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735967462] [2021-11-20 07:27:31,477 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:31,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:27:31,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:31,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:27:31,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:27:31,479 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:31,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:31,723 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2021-11-20 07:27:31,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:27:31,724 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 07:27:31,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:31,725 INFO L225 Difference]: With dead ends: 42 [2021-11-20 07:27:31,725 INFO L226 Difference]: Without dead ends: 24 [2021-11-20 07:27:31,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:27:31,727 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:31,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2021-11-20 07:27:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-20 07:27:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-20 07:27:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:31,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-11-20 07:27:31,735 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 18 [2021-11-20 07:27:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:31,735 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-11-20 07:27:31,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:31,736 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-11-20 07:27:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 07:27:31,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:31,737 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] [2021-11-20 07:27:31,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:31,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:31,940 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:31,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:31,942 INFO L85 PathProgramCache]: Analyzing trace with hash -308201553, now seen corresponding path program 1 times [2021-11-20 07:27:31,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:31,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715989780] [2021-11-20 07:27:31,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:31,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:31,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:31,950 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:31,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 07:27:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:32,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:27:32,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:32,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:32,666 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:32,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715989780] [2021-11-20 07:27:32,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715989780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:32,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:32,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 07:27:32,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043242551] [2021-11-20 07:27:32,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:32,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:27:32,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:32,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:27:32,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:27:32,670 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:32,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:32,880 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2021-11-20 07:27:32,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:27:32,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 07:27:32,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:32,883 INFO L225 Difference]: With dead ends: 45 [2021-11-20 07:27:32,883 INFO L226 Difference]: Without dead ends: 27 [2021-11-20 07:27:32,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:27:32,885 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:32,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2021-11-20 07:27:32,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-20 07:27:32,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-20 07:27:32,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:32,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-20 07:27:32,892 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 21 [2021-11-20 07:27:32,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:32,892 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-20 07:27:32,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:32,892 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-20 07:27:32,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 07:27:32,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:32,893 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] [2021-11-20 07:27:32,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-20 07:27:33,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:33,108 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:33,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1090691504, now seen corresponding path program 1 times [2021-11-20 07:27:33,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:33,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772133954] [2021-11-20 07:27:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:33,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:33,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:33,111 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:33,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 07:27:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:27:33,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:33,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:33,388 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:33,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772133954] [2021-11-20 07:27:33,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772133954] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:33,389 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:33,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 07:27:33,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006592832] [2021-11-20 07:27:33,389 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:33,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:27:33,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:33,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:27:33,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:27:33,391 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:33,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:33,808 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2021-11-20 07:27:33,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:27:33,811 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-20 07:27:33,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:33,812 INFO L225 Difference]: With dead ends: 64 [2021-11-20 07:27:33,812 INFO L226 Difference]: Without dead ends: 46 [2021-11-20 07:27:33,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:27:33,814 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:33,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:27:33,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-20 07:27:33,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-11-20 07:27:33,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 07:27:33,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-11-20 07:27:33,824 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 22 [2021-11-20 07:27:33,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:33,824 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-11-20 07:27:33,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:33,825 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-11-20 07:27:33,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 07:27:33,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:33,826 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:33,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:34,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:34,040 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:34,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:34,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1958262791, now seen corresponding path program 2 times [2021-11-20 07:27:34,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:34,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069027924] [2021-11-20 07:27:34,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:27:34,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:34,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:34,047 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:34,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 07:27:34,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:27:34,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:34,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:27:34,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:34,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:34,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:34,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069027924] [2021-11-20 07:27:34,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069027924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:34,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:34,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-20 07:27:34,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838819201] [2021-11-20 07:27:34,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:34,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:27:34,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:34,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:27:34,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:27:34,337 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:34,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:34,843 INFO L93 Difference]: Finished difference Result 110 states and 145 transitions. [2021-11-20 07:27:34,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:27:34,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-20 07:27:34,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:34,851 INFO L225 Difference]: With dead ends: 110 [2021-11-20 07:27:34,851 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 07:27:34,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:27:34,853 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 54 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:34,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 113 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:27:34,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 07:27:34,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 39. [2021-11-20 07:27:34,864 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 07:27:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-11-20 07:27:34,865 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 24 [2021-11-20 07:27:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:34,866 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-11-20 07:27:34,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 07:27:34,866 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-11-20 07:27:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 07:27:34,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:34,867 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] [2021-11-20 07:27:34,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:35,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:35,082 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:35,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:35,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1982846008, now seen corresponding path program 1 times [2021-11-20 07:27:35,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:35,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919844787] [2021-11-20 07:27:35,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:35,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:35,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:35,085 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:35,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 07:27:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:35,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:27:35,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:35,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:36,456 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:36,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919844787] [2021-11-20 07:27:36,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919844787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:36,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:36,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-20 07:27:36,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989856647] [2021-11-20 07:27:36,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:36,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:36,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:36,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:36,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:36,459 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 07:27:37,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:37,166 INFO L93 Difference]: Finished difference Result 93 states and 124 transitions. [2021-11-20 07:27:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:27:37,167 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-20 07:27:37,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:37,168 INFO L225 Difference]: With dead ends: 93 [2021-11-20 07:27:37,168 INFO L226 Difference]: Without dead ends: 63 [2021-11-20 07:27:37,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:27:37,170 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:37,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 26 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 98 Invalid, 0 Unknown, 33 Unchecked, 0.4s Time] [2021-11-20 07:27:37,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-20 07:27:37,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-11-20 07:27:37,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2021-11-20 07:27:37,185 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 25 [2021-11-20 07:27:37,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:37,185 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2021-11-20 07:27:37,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 07:27:37,186 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2021-11-20 07:27:37,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 07:27:37,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:37,188 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:37,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:37,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:37,403 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:37,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:37,404 INFO L85 PathProgramCache]: Analyzing trace with hash -951111360, now seen corresponding path program 2 times [2021-11-20 07:27:37,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:37,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654530356] [2021-11-20 07:27:37,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:27:37,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:37,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:37,405 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:37,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 07:27:37,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:27:37,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:37,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:27:37,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:27:37,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:27:38,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:38,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654530356] [2021-11-20 07:27:38,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654530356] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:38,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:38,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 07:27:38,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200992429] [2021-11-20 07:27:38,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:38,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:27:38,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:38,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:27:38,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:27:38,187 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:38,337 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2021-11-20 07:27:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:27:38,338 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-20 07:27:38,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:38,339 INFO L225 Difference]: With dead ends: 86 [2021-11-20 07:27:38,339 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 07:27:38,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:27:38,340 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:38,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2021-11-20 07:27:38,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 07:27:38,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2021-11-20 07:27:38,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.271186440677966) internal successors, (75), 59 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 07:27:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2021-11-20 07:27:38,361 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 28 [2021-11-20 07:27:38,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:38,361 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2021-11-20 07:27:38,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2021-11-20 07:27:38,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 07:27:38,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:38,367 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:38,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:38,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:38,580 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:38,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:38,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1335460331, now seen corresponding path program 3 times [2021-11-20 07:27:38,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:38,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183768212] [2021-11-20 07:27:38,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:27:38,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:38,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:38,583 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:38,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 07:27:38,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 07:27:38,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:38,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:27:38,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 07:27:39,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:39,315 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 07:27:39,316 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:39,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183768212] [2021-11-20 07:27:39,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183768212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:39,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:39,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 07:27:39,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115836924] [2021-11-20 07:27:39,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:39,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:27:39,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:39,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:27:39,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:27:39,319 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:39,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:39,353 INFO L93 Difference]: Finished difference Result 91 states and 116 transitions. [2021-11-20 07:27:39,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:27:39,354 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-20 07:27:39,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:39,357 INFO L225 Difference]: With dead ends: 91 [2021-11-20 07:27:39,357 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 07:27:39,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:27:39,359 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:39,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2021-11-20 07:27:39,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 07:27:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-11-20 07:27:39,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 84 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:27:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2021-11-20 07:27:39,391 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 31 [2021-11-20 07:27:39,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:39,392 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2021-11-20 07:27:39,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:39,393 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2021-11-20 07:27:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 07:27:39,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:39,399 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:39,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:39,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:39,612 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:39,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1026825090, now seen corresponding path program 4 times [2021-11-20 07:27:39,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:39,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980757738] [2021-11-20 07:27:39,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:27:39,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:39,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:39,615 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:39,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 07:27:39,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:27:39,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:39,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:27:39,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:27:40,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:27:40,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:40,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980757738] [2021-11-20 07:27:40,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980757738] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:40,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:40,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-11-20 07:27:40,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389198275] [2021-11-20 07:27:40,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:40,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:27:40,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:40,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:27:40,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:27:40,809 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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 07:27:42,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:42,053 INFO L93 Difference]: Finished difference Result 231 states and 308 transitions. [2021-11-20 07:27:42,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:27:42,054 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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) Word has length 34 [2021-11-20 07:27:42,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:42,056 INFO L225 Difference]: With dead ends: 231 [2021-11-20 07:27:42,056 INFO L226 Difference]: Without dead ends: 176 [2021-11-20 07:27:42,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:27:42,057 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:42,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 103 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 85 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2021-11-20 07:27:42,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-20 07:27:42,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 141. [2021-11-20 07:27:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.3214285714285714) internal successors, (185), 140 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 07:27:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 185 transitions. [2021-11-20 07:27:42,080 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 185 transitions. Word has length 34 [2021-11-20 07:27:42,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:42,080 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 185 transitions. [2021-11-20 07:27:42,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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 07:27:42,080 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 185 transitions. [2021-11-20 07:27:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 07:27:42,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:42,082 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:42,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:42,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:42,295 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:42,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:42,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1329887459, now seen corresponding path program 5 times [2021-11-20 07:27:42,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:42,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677692878] [2021-11-20 07:27:42,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:27:42,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:42,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:42,298 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:42,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 07:27:42,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-20 07:27:42,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:42,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:27:42,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:27:42,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:27:42,692 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:42,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677692878] [2021-11-20 07:27:42,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677692878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:42,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:42,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-20 07:27:42,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925028231] [2021-11-20 07:27:42,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:42,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:27:42,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:42,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:27:42,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:27:42,694 INFO L87 Difference]: Start difference. First operand 141 states and 185 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:42,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:42,960 INFO L93 Difference]: Finished difference Result 210 states and 277 transitions. [2021-11-20 07:27:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:27:42,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-20 07:27:42,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:42,963 INFO L225 Difference]: With dead ends: 210 [2021-11-20 07:27:42,963 INFO L226 Difference]: Without dead ends: 145 [2021-11-20 07:27:42,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:27:42,964 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:42,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:27:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-20 07:27:42,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 138. [2021-11-20 07:27:42,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.2773722627737227) internal successors, (175), 137 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 07:27:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 175 transitions. [2021-11-20 07:27:42,984 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 175 transitions. Word has length 35 [2021-11-20 07:27:42,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:42,985 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 175 transitions. [2021-11-20 07:27:42,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:42,985 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 175 transitions. [2021-11-20 07:27:42,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 07:27:42,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:42,986 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:43,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:43,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:43,200 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:43,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:43,201 INFO L85 PathProgramCache]: Analyzing trace with hash -863664749, now seen corresponding path program 1 times [2021-11-20 07:27:43,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:43,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288954066] [2021-11-20 07:27:43,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:43,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:43,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:43,203 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:43,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 07:27:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:43,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:27:43,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:27:43,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:27:44,489 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:44,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288954066] [2021-11-20 07:27:44,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288954066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:44,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:44,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-11-20 07:27:44,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727138292] [2021-11-20 07:27:44,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:44,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:27:44,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:44,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:27:44,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:27:44,492 INFO L87 Difference]: Start difference. First operand 138 states and 175 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:45,493 INFO L93 Difference]: Finished difference Result 292 states and 384 transitions. [2021-11-20 07:27:45,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:27:45,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-20 07:27:45,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:45,503 INFO L225 Difference]: With dead ends: 292 [2021-11-20 07:27:45,503 INFO L226 Difference]: Without dead ends: 279 [2021-11-20 07:27:45,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:27:45,508 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 85 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:45,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 72 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 95 Invalid, 0 Unknown, 92 Unchecked, 0.5s Time] [2021-11-20 07:27:45,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-20 07:27:45,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 228. [2021-11-20 07:27:45,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.3171806167400881) internal successors, (299), 227 states have internal predecessors, (299), 0 states have call successors, (0), 0 states 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 07:27:45,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 299 transitions. [2021-11-20 07:27:45,550 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 299 transitions. Word has length 36 [2021-11-20 07:27:45,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:45,550 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 299 transitions. [2021-11-20 07:27:45,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:45,551 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 299 transitions. [2021-11-20 07:27:45,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 07:27:45,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:45,553 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:45,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:45,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:45,756 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:45,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:45,756 INFO L85 PathProgramCache]: Analyzing trace with hash -892878219, now seen corresponding path program 2 times [2021-11-20 07:27:45,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:45,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263544614] [2021-11-20 07:27:45,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:27:45,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:45,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:45,758 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:45,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 07:27:45,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:27:45,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:45,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:27:45,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 07:27:46,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 07:27:46,692 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:46,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263544614] [2021-11-20 07:27:46,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263544614] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:46,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:46,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 07:27:46,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378840940] [2021-11-20 07:27:46,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:46,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:27:46,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:46,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:27:46,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:27:46,697 INFO L87 Difference]: Start difference. First operand 228 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:46,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:46,720 INFO L93 Difference]: Finished difference Result 240 states and 313 transitions. [2021-11-20 07:27:46,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:27:46,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-20 07:27:46,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:46,722 INFO L225 Difference]: With dead ends: 240 [2021-11-20 07:27:46,722 INFO L226 Difference]: Without dead ends: 236 [2021-11-20 07:27:46,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:27:46,724 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:46,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2021-11-20 07:27:46,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-20 07:27:46,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 167. [2021-11-20 07:27:46,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.2891566265060241) internal successors, (214), 166 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 07:27:46,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 214 transitions. [2021-11-20 07:27:46,747 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 214 transitions. Word has length 38 [2021-11-20 07:27:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:46,747 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 214 transitions. [2021-11-20 07:27:46,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:46,748 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 214 transitions. [2021-11-20 07:27:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 07:27:46,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:46,750 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:46,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:46,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:46,963 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:46,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:46,964 INFO L85 PathProgramCache]: Analyzing trace with hash 54280905, now seen corresponding path program 6 times [2021-11-20 07:27:46,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:46,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078618344] [2021-11-20 07:27:46,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:27:46,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:46,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:46,965 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:46,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 07:27:47,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-20 07:27:47,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:47,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:27:47,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:27:47,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:27:48,425 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:48,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078618344] [2021-11-20 07:27:48,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078618344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:48,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:48,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-11-20 07:27:48,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634086735] [2021-11-20 07:27:48,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:48,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:48,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:48,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:48,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:48,427 INFO L87 Difference]: Start difference. First operand 167 states and 214 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:49,928 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2021-11-20 07:27:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:27:49,930 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-20 07:27:49,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:49,931 INFO L225 Difference]: With dead ends: 215 [2021-11-20 07:27:49,932 INFO L226 Difference]: Without dead ends: 197 [2021-11-20 07:27:49,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-20 07:27:49,933 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:49,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 47 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 98 Invalid, 0 Unknown, 82 Unchecked, 0.7s Time] [2021-11-20 07:27:49,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-20 07:27:49,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2021-11-20 07:27:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.3) internal successors, (234), 180 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 07:27:49,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 234 transitions. [2021-11-20 07:27:49,955 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 234 transitions. Word has length 38 [2021-11-20 07:27:49,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:49,956 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 234 transitions. [2021-11-20 07:27:49,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 234 transitions. [2021-11-20 07:27:49,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 07:27:49,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:49,957 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:49,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:50,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:50,172 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:50,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:50,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1018497115, now seen corresponding path program 7 times [2021-11-20 07:27:50,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:50,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45288001] [2021-11-20 07:27:50,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:27:50,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:50,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:50,175 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:50,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 07:27:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:50,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:27:50,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:27:50,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:27:51,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:51,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45288001] [2021-11-20 07:27:51,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45288001] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:51,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:51,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-11-20 07:27:51,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174545476] [2021-11-20 07:27:51,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:51,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:27:51,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:27:51,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:27:51,587 INFO L87 Difference]: Start difference. First operand 181 states and 234 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:53,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:53,510 INFO L93 Difference]: Finished difference Result 442 states and 587 transitions. [2021-11-20 07:27:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:27:53,511 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-20 07:27:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:53,514 INFO L225 Difference]: With dead ends: 442 [2021-11-20 07:27:53,514 INFO L226 Difference]: Without dead ends: 364 [2021-11-20 07:27:53,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:27:53,516 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:53,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 120 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 120 Unchecked, 0.3s Time] [2021-11-20 07:27:53,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-20 07:27:53,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 318. [2021-11-20 07:27:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.3154574132492114) internal successors, (417), 317 states have internal predecessors, (417), 0 states have call successors, (0), 0 states 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 07:27:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 417 transitions. [2021-11-20 07:27:53,558 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 417 transitions. Word has length 38 [2021-11-20 07:27:53,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:53,558 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 417 transitions. [2021-11-20 07:27:53,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:53,559 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 417 transitions. [2021-11-20 07:27:53,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:27:53,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:53,560 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:53,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:53,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:53,774 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:53,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:53,774 INFO L85 PathProgramCache]: Analyzing trace with hash -984604620, now seen corresponding path program 8 times [2021-11-20 07:27:53,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:53,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540008767] [2021-11-20 07:27:53,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:27:53,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:53,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:53,777 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:53,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 07:27:53,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:27:53,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:53,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:27:53,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:27:54,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:27:54,826 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:54,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540008767] [2021-11-20 07:27:54,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540008767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:54,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:54,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 14 [2021-11-20 07:27:54,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14256270] [2021-11-20 07:27:54,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:54,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:27:54,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:54,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:27:54,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:27:54,829 INFO L87 Difference]: Start difference. First operand 318 states and 417 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:55,480 INFO L93 Difference]: Finished difference Result 656 states and 887 transitions. [2021-11-20 07:27:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:27:55,489 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-20 07:27:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:55,493 INFO L225 Difference]: With dead ends: 656 [2021-11-20 07:27:55,493 INFO L226 Difference]: Without dead ends: 507 [2021-11-20 07:27:55,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:27:55,495 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:55,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 66 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2021-11-20 07:27:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-20 07:27:55,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2021-11-20 07:27:55,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 1.3373737373737373) internal successors, (662), 495 states have internal predecessors, (662), 0 states have call successors, (0), 0 states 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 07:27:55,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 662 transitions. [2021-11-20 07:27:55,560 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 662 transitions. Word has length 41 [2021-11-20 07:27:55,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:55,560 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 662 transitions. [2021-11-20 07:27:55,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:55,561 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 662 transitions. [2021-11-20 07:27:55,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:27:55,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:55,563 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:55,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:55,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:55,776 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:55,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:55,777 INFO L85 PathProgramCache]: Analyzing trace with hash 421760628, now seen corresponding path program 3 times [2021-11-20 07:27:55,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:55,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920401695] [2021-11-20 07:27:55,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:27:55,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:55,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:55,778 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:55,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 07:27:55,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:27:55,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:55,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:27:55,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 07:27:56,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 07:27:56,810 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:56,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920401695] [2021-11-20 07:27:56,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920401695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:56,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:56,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-11-20 07:27:56,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62155832] [2021-11-20 07:27:56,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:56,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:27:56,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:56,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:27:56,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:27:56,813 INFO L87 Difference]: Start difference. First operand 496 states and 662 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 07:27:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:56,946 INFO L93 Difference]: Finished difference Result 536 states and 713 transitions. [2021-11-20 07:27:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:27:56,947 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) Word has length 41 [2021-11-20 07:27:56,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:56,960 INFO L225 Difference]: With dead ends: 536 [2021-11-20 07:27:56,960 INFO L226 Difference]: Without dead ends: 523 [2021-11-20 07:27:56,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:27:56,961 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:56,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2021-11-20 07:27:56,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-20 07:27:57,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 503. [2021-11-20 07:27:57,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.3346613545816732) internal successors, (670), 502 states have internal predecessors, (670), 0 states have call successors, (0), 0 states 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 07:27:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 670 transitions. [2021-11-20 07:27:57,028 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 670 transitions. Word has length 41 [2021-11-20 07:27:57,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:57,028 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 670 transitions. [2021-11-20 07:27:57,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 07:27:57,029 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 670 transitions. [2021-11-20 07:27:57,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:27:57,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:57,031 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:57,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:57,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:57,244 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:57,244 INFO L85 PathProgramCache]: Analyzing trace with hash -550379465, now seen corresponding path program 9 times [2021-11-20 07:27:57,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:57,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920731512] [2021-11-20 07:27:57,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:27:57,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:57,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:57,247 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:57,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 07:27:57,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:27:57,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:57,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:27:57,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 07:27:57,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 07:27:58,295 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:58,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920731512] [2021-11-20 07:27:58,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920731512] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:58,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:58,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-11-20 07:27:58,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628683580] [2021-11-20 07:27:58,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:58,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:27:58,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:58,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:27:58,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:27:58,298 INFO L87 Difference]: Start difference. First operand 503 states and 670 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:58,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:58,813 INFO L93 Difference]: Finished difference Result 548 states and 725 transitions. [2021-11-20 07:27:58,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:27:58,814 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-20 07:27:58,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:58,818 INFO L225 Difference]: With dead ends: 548 [2021-11-20 07:27:58,819 INFO L226 Difference]: Without dead ends: 533 [2021-11-20 07:27:58,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:58,820 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:58,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 39 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2021-11-20 07:27:58,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-11-20 07:27:58,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 518. [2021-11-20 07:27:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 1.3307543520309477) internal successors, (688), 517 states have internal predecessors, (688), 0 states have call successors, (0), 0 states 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 07:27:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 688 transitions. [2021-11-20 07:27:58,887 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 688 transitions. Word has length 41 [2021-11-20 07:27:58,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:58,887 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 688 transitions. [2021-11-20 07:27:58,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:58,888 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 688 transitions. [2021-11-20 07:27:58,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 07:27:58,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:58,889 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:58,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:59,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:27:59,101 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:59,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1590540904, now seen corresponding path program 4 times [2021-11-20 07:27:59,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:27:59,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309734883] [2021-11-20 07:27:59,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:27:59,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:27:59,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:27:59,103 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:27:59,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 07:27:59,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:27:59,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:59,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:27:59,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 07:27:59,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 07:27:59,428 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:27:59,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309734883] [2021-11-20 07:27:59,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309734883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:59,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:59,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-20 07:27:59,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023834028] [2021-11-20 07:27:59,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:59,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:27:59,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:27:59,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:27:59,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:27:59,430 INFO L87 Difference]: Start difference. First operand 518 states and 688 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 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 07:27:59,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:59,860 INFO L93 Difference]: Finished difference Result 1129 states and 1534 transitions. [2021-11-20 07:27:59,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:27:59,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 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) Word has length 42 [2021-11-20 07:27:59,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:59,866 INFO L225 Difference]: With dead ends: 1129 [2021-11-20 07:27:59,866 INFO L226 Difference]: Without dead ends: 696 [2021-11-20 07:27:59,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:27:59,868 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:59,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 58 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:27:59,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-11-20 07:27:59,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 572. [2021-11-20 07:27:59,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 1.3134851138353765) internal successors, (750), 571 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 07:27:59,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 750 transitions. [2021-11-20 07:27:59,942 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 750 transitions. Word has length 42 [2021-11-20 07:27:59,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:59,942 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 750 transitions. [2021-11-20 07:27:59,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 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 07:27:59,943 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 750 transitions. [2021-11-20 07:27:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 07:27:59,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:59,945 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:59,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:00,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:28:00,160 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:28:00,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:00,160 INFO L85 PathProgramCache]: Analyzing trace with hash 631089746, now seen corresponding path program 5 times [2021-11-20 07:28:00,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:28:00,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025179323] [2021-11-20 07:28:00,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:28:00,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:28:00,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:28:00,163 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:28:00,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 07:28:00,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 07:28:00,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:28:00,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 07:28:00,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:28:00,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:28:01,267 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:28:01,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025179323] [2021-11-20 07:28:01,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025179323] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:28:01,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:28:01,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2021-11-20 07:28:01,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592353357] [2021-11-20 07:28:01,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:01,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:28:01,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:28:01,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:28:01,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:28:01,270 INFO L87 Difference]: Start difference. First operand 572 states and 750 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:03,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:03,671 INFO L93 Difference]: Finished difference Result 1306 states and 1732 transitions. [2021-11-20 07:28:03,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:28:03,672 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-20 07:28:03,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:03,678 INFO L225 Difference]: With dead ends: 1306 [2021-11-20 07:28:03,678 INFO L226 Difference]: Without dead ends: 877 [2021-11-20 07:28:03,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 07:28:03,681 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 210 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:03,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 100 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 07:28:03,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-11-20 07:28:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 195. [2021-11-20 07:28:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.1958762886597938) internal successors, (232), 194 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 07:28:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 232 transitions. [2021-11-20 07:28:03,731 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 232 transitions. Word has length 42 [2021-11-20 07:28:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:03,731 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 232 transitions. [2021-11-20 07:28:03,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 232 transitions. [2021-11-20 07:28:03,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:28:03,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:03,733 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:03,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:03,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:28:03,947 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:28:03,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:03,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1943339208, now seen corresponding path program 6 times [2021-11-20 07:28:03,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:28:03,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696994308] [2021-11-20 07:28:03,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:28:03,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:28:03,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:28:03,949 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:28:03,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8f8523-ce88-4522-9cba-5d44b5fd3ad6/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 07:28:04,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-20 07:28:04,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:28:04,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 07:28:04,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:04,522 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 23 treesize of output 19 [2021-11-20 07:28:05,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:05,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2021-11-20 07:28:06,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:06,283 INFO L354 Elim1Store]: treesize reduction 65, result has 31.6 percent of original size [2021-11-20 07:28:06,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 55 [2021-11-20 07:28:07,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:07,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:07,339 INFO L354 Elim1Store]: treesize reduction 91, result has 23.5 percent of original size [2021-11-20 07:28:07,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 66 [2021-11-20 07:28:10,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:10,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:10,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:10,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:10,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:10,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:10,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:28:10,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:28:10,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 24 [2021-11-20 07:28:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:28:10,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:51,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 508 treesize of output 492 [2021-11-20 07:28:55,045 INFO L354 Elim1Store]: treesize reduction 41, result has 53.4 percent of original size [2021-11-20 07:28:55,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 849365083 treesize of output 827345033