./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label53.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label53.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f09951f8169d75602552a0c69d410baacae8493e4742c50eb18d4008647dffd9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:05:07,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:05:07,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:05:07,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:05:07,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:05:07,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:05:07,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:05:07,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:05:07,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:05:07,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:05:07,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:05:07,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:05:07,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:05:07,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:05:07,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:05:07,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:05:07,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:05:07,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:05:07,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:05:07,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:05:07,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:05:07,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:05:07,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:05:07,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:05:07,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:05:07,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:05:07,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:05:07,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:05:07,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:05:07,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:05:07,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:05:07,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:05:07,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:05:07,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:05:07,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:05:07,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:05:07,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:05:07,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:05:07,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:05:07,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:05:07,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:05:07,811 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:05:07,869 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:05:07,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:05:07,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:05:07,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:05:07,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:05:07,880 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:05:07,880 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:05:07,880 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:05:07,881 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:05:07,881 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:05:07,882 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:05:07,883 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:05:07,883 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:05:07,883 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:05:07,884 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:05:07,884 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:05:07,884 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:05:07,885 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:05:07,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:05:07,887 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:05:07,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:05:07,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:05:07,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:05:07,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:05:07,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:05:07,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:05:07,891 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:05:07,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:05:07,892 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:05:07,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:05:07,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:05:07,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:05:07,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:05:07,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:05:07,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:05:07,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:05:07,894 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:05:07,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:05:07,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:05:07,895 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:05:07,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:05:07,896 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f09951f8169d75602552a0c69d410baacae8493e4742c50eb18d4008647dffd9 [2021-11-23 17:05:08,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:05:08,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:05:08,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:05:08,298 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:05:08,299 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:05:08,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem14_label53.c [2021-11-23 17:05:08,391 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/data/c5dc4d004/183e10d3ccd6498f81f95622bb60fa83/FLAGbbecbdbac [2021-11-23 17:05:09,092 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:05:09,093 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/sv-benchmarks/c/eca-rers2012/Problem14_label53.c [2021-11-23 17:05:09,111 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/data/c5dc4d004/183e10d3ccd6498f81f95622bb60fa83/FLAGbbecbdbac [2021-11-23 17:05:09,277 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/data/c5dc4d004/183e10d3ccd6498f81f95622bb60fa83 [2021-11-23 17:05:09,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:05:09,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:05:09,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:05:09,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:05:09,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:05:09,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:05:09" (1/1) ... [2021-11-23 17:05:09,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36acdd90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:09, skipping insertion in model container [2021-11-23 17:05:09,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:05:09" (1/1) ... [2021-11-23 17:05:09,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:05:09,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:05:09,703 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_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/sv-benchmarks/c/eca-rers2012/Problem14_label53.c[5103,5116] [2021-11-23 17:05:09,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:05:09,989 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:05:10,044 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_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/sv-benchmarks/c/eca-rers2012/Problem14_label53.c[5103,5116] [2021-11-23 17:05:10,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:05:10,218 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:05:10,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:10 WrapperNode [2021-11-23 17:05:10,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:05:10,220 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:05:10,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:05:10,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:05:10,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:10" (1/1) ... [2021-11-23 17:05:10,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:10" (1/1) ... [2021-11-23 17:05:10,345 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 858 [2021-11-23 17:05:10,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:05:10,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:05:10,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:05:10,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:05:10,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:10" (1/1) ... [2021-11-23 17:05:10,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:10" (1/1) ... [2021-11-23 17:05:10,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:10" (1/1) ... [2021-11-23 17:05:10,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:10" (1/1) ... [2021-11-23 17:05:10,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:10" (1/1) ... [2021-11-23 17:05:10,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:10" (1/1) ... [2021-11-23 17:05:10,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:10" (1/1) ... [2021-11-23 17:05:10,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:05:10,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:05:10,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:05:10,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:05:10,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:10" (1/1) ... [2021-11-23 17:05:10,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:05:10,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:05:10,567 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:05:10,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:05:10,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:05:10,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:05:10,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:05:10,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:05:10,701 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:05:10,702 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:05:12,291 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:05:12,353 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:05:12,367 INFO L158 Benchmark]: Toolchain (without parser) took 3082.50ms. Allocated memory was 98.6MB in the beginning and 123.7MB in the end (delta: 25.2MB). Free memory was 53.5MB in the beginning and 54.4MB in the end (delta: -943.4kB). Peak memory consumption was 32.9MB. Max. memory is 16.1GB. [2021-11-23 17:05:12,367 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 98.6MB. Free memory was 72.2MB in the beginning and 72.1MB in the end (delta: 84.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:05:12,369 INFO L158 Benchmark]: CACSL2BoogieTranslator took 911.90ms. Allocated memory is still 98.6MB. Free memory was 75.8MB in the beginning and 50.1MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-23 17:05:12,371 INFO L158 Benchmark]: Boogie Procedure Inliner took 125.57ms. Allocated memory is still 98.6MB. Free memory was 50.1MB in the beginning and 40.5MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:05:12,373 INFO L158 Benchmark]: Boogie Preprocessor took 176.36ms. Allocated memory was 98.6MB in the beginning and 123.7MB in the end (delta: 25.2MB). Free memory was 40.5MB in the beginning and 90.5MB in the end (delta: -50.0MB). Peak memory consumption was 15.4MB. Max. memory is 16.1GB. [2021-11-23 17:05:12,374 INFO L158 Benchmark]: RCFGBuilder took 1838.86ms. Allocated memory is still 123.7MB. Free memory was 89.9MB in the beginning and 54.4MB in the end (delta: 35.4MB). Peak memory consumption was 44.0MB. Max. memory is 16.1GB. [2021-11-23 17:05:12,387 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 98.6MB. Free memory was 72.2MB in the beginning and 72.1MB in the end (delta: 84.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 911.90ms. Allocated memory is still 98.6MB. Free memory was 75.8MB in the beginning and 50.1MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 125.57ms. Allocated memory is still 98.6MB. Free memory was 50.1MB in the beginning and 40.5MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 176.36ms. Allocated memory was 98.6MB in the beginning and 123.7MB in the end (delta: 25.2MB). Free memory was 40.5MB in the beginning and 90.5MB in the end (delta: -50.0MB). Peak memory consumption was 15.4MB. Max. memory is 16.1GB. * RCFGBuilder took 1838.86ms. Allocated memory is still 123.7MB. Free memory was 89.9MB in the beginning and 54.4MB in the end (delta: 35.4MB). Peak memory consumption was 44.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:05:12,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label53.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f09951f8169d75602552a0c69d410baacae8493e4742c50eb18d4008647dffd9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:05:15,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:05:15,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:05:15,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:05:15,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:05:15,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:05:15,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:05:15,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:05:15,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:05:15,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:05:15,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:05:15,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:05:15,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:05:15,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:05:15,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:05:15,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:05:15,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:05:15,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:05:15,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:05:15,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:05:15,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:05:15,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:05:15,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:05:15,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:05:15,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:05:15,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:05:15,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:05:15,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:05:15,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:05:15,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:05:15,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:05:15,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:05:15,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:05:15,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:05:15,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:05:15,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:05:15,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:05:15,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:05:15,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:05:15,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:05:15,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:05:15,471 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:05:15,530 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:05:15,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:05:15,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:05:15,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:05:15,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:05:15,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:05:15,534 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:05:15,534 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:05:15,534 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:05:15,535 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:05:15,536 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:05:15,536 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:05:15,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:05:15,539 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:05:15,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:05:15,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:05:15,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:05:15,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:05:15,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:05:15,540 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:05:15,541 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:05:15,541 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:05:15,541 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:05:15,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:05:15,542 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:05:15,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:05:15,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:05:15,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:05:15,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:05:15,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:05:15,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:05:15,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:05:15,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:05:15,545 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:05:15,546 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:05:15,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:05:15,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:05:15,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:05:15,547 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f09951f8169d75602552a0c69d410baacae8493e4742c50eb18d4008647dffd9 [2021-11-23 17:05:16,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:05:16,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:05:16,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:05:16,088 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:05:16,088 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:05:16,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem14_label53.c [2021-11-23 17:05:16,176 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/data/b6c2e41d0/19b1c7696830499ea69aaeddfa323772/FLAGc121650db [2021-11-23 17:05:16,973 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:05:16,974 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/sv-benchmarks/c/eca-rers2012/Problem14_label53.c [2021-11-23 17:05:17,007 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/data/b6c2e41d0/19b1c7696830499ea69aaeddfa323772/FLAGc121650db [2021-11-23 17:05:17,199 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/data/b6c2e41d0/19b1c7696830499ea69aaeddfa323772 [2021-11-23 17:05:17,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:05:17,207 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:05:17,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:05:17,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:05:17,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:05:17,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:05:17" (1/1) ... [2021-11-23 17:05:17,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f5d5dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:17, skipping insertion in model container [2021-11-23 17:05:17,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:05:17" (1/1) ... [2021-11-23 17:05:17,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:05:17,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:05:17,574 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_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/sv-benchmarks/c/eca-rers2012/Problem14_label53.c[5103,5116] [2021-11-23 17:05:17,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:05:18,012 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:05:18,066 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_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/sv-benchmarks/c/eca-rers2012/Problem14_label53.c[5103,5116] [2021-11-23 17:05:18,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:05:18,289 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:05:18,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:18 WrapperNode [2021-11-23 17:05:18,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:05:18,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:05:18,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:05:18,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:05:18,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:18" (1/1) ... [2021-11-23 17:05:18,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:18" (1/1) ... [2021-11-23 17:05:18,441 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 856 [2021-11-23 17:05:18,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:05:18,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:05:18,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:05:18,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:05:18,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:18" (1/1) ... [2021-11-23 17:05:18,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:18" (1/1) ... [2021-11-23 17:05:18,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:18" (1/1) ... [2021-11-23 17:05:18,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:18" (1/1) ... [2021-11-23 17:05:18,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:18" (1/1) ... [2021-11-23 17:05:18,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:18" (1/1) ... [2021-11-23 17:05:18,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:18" (1/1) ... [2021-11-23 17:05:18,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:05:18,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:05:18,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:05:18,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:05:18,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:18" (1/1) ... [2021-11-23 17:05:18,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:05:18,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:05:18,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:05:18,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:05:18,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:05:18,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:05:18,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:05:18,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:05:18,793 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:05:18,795 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:05:22,984 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:05:22,997 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:05:22,997 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:05:23,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:05:23 BoogieIcfgContainer [2021-11-23 17:05:23,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:05:23,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:05:23,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:05:23,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:05:23,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:05:17" (1/3) ... [2021-11-23 17:05:23,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32628a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:05:23, skipping insertion in model container [2021-11-23 17:05:23,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:05:18" (2/3) ... [2021-11-23 17:05:23,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32628a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:05:23, skipping insertion in model container [2021-11-23 17:05:23,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:05:23" (3/3) ... [2021-11-23 17:05:23,011 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label53.c [2021-11-23 17:05:23,018 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:05:23,019 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:05:23,083 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:05:23,092 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=FINITE_AUTOMATA, 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 [2021-11-23 17:05:23,093 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:05:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 17:05:23,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:05:23,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:05:23,149 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:05:23,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:05:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash 301649817, now seen corresponding path program 1 times [2021-11-23 17:05:23,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:05:23,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81814284] [2021-11-23 17:05:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:23,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:05:23,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:05:23,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:05:23,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:05:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:23,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:05:23,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:23,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:05:23,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:05:23,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81814284] [2021-11-23 17:05:23,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81814284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:05:23,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:05:23,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:05:23,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034219963] [2021-11-23 17:05:23,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:05:23,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:05:23,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:05:23,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:05:23,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:05:23,784 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 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 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 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) [2021-11-23 17:05:28,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:05:28,076 INFO L93 Difference]: Finished difference Result 685 states and 1216 transitions. [2021-11-23 17:05:28,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:05:28,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 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 49 [2021-11-23 17:05:28,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:05:28,097 INFO L225 Difference]: With dead ends: 685 [2021-11-23 17:05:28,097 INFO L226 Difference]: Without dead ends: 360 [2021-11-23 17:05:28,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:05:28,107 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:05:28,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 139 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 17:05:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-23 17:05:28,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-11-23 17:05:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.4206128133704736) internal successors, (510), 359 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:28,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 510 transitions. [2021-11-23 17:05:28,192 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 510 transitions. Word has length 49 [2021-11-23 17:05:28,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:05:28,193 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 510 transitions. [2021-11-23 17:05:28,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 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) [2021-11-23 17:05:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 510 transitions. [2021-11-23 17:05:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 17:05:28,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:05:28,201 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:05:28,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:28,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:05:28,426 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:05:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:05:28,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1731751822, now seen corresponding path program 1 times [2021-11-23 17:05:28,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:05:28,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752590696] [2021-11-23 17:05:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:28,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:05:28,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:05:28,430 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:05:28,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:05:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:28,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:05:28,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:29,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:05:29,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:05:29,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752590696] [2021-11-23 17:05:29,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752590696] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:05:29,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:05:29,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:05:29,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139437840] [2021-11-23 17:05:29,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:05:29,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:05:29,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:05:29,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:05:29,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:05:29,048 INFO L87 Difference]: Start difference. First operand 360 states and 510 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:33,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:05:33,870 INFO L93 Difference]: Finished difference Result 1074 states and 1525 transitions. [2021-11-23 17:05:33,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:05:33,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2021-11-23 17:05:33,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:05:33,881 INFO L225 Difference]: With dead ends: 1074 [2021-11-23 17:05:33,887 INFO L226 Difference]: Without dead ends: 716 [2021-11-23 17:05:33,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:05:33,894 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 111 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:05:33,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 108 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-23 17:05:33,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-23 17:05:33,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-11-23 17:05:33,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.3034965034965036) internal successors, (932), 715 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:33,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 932 transitions. [2021-11-23 17:05:33,990 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 932 transitions. Word has length 118 [2021-11-23 17:05:33,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:05:33,992 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 932 transitions. [2021-11-23 17:05:33,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:33,993 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 932 transitions. [2021-11-23 17:05:34,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 17:05:34,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:05:34,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:05:34,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:34,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:05:34,229 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:05:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:05:34,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1413310333, now seen corresponding path program 1 times [2021-11-23 17:05:34,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:05:34,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215020478] [2021-11-23 17:05:34,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:34,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:05:34,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:05:34,234 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:05:34,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:05:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:34,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:05:34,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:35,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:05:35,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:05:35,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215020478] [2021-11-23 17:05:35,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215020478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:05:35,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:05:35,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:05:35,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825399030] [2021-11-23 17:05:35,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:05:35,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:05:35,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:05:35,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:05:35,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:05:35,256 INFO L87 Difference]: Start difference. First operand 716 states and 932 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:05:38,208 INFO L93 Difference]: Finished difference Result 1074 states and 1452 transitions. [2021-11-23 17:05:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:05:38,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-11-23 17:05:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:05:38,216 INFO L225 Difference]: With dead ends: 1074 [2021-11-23 17:05:38,216 INFO L226 Difference]: Without dead ends: 716 [2021-11-23 17:05:38,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:05:38,219 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 106 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:05:38,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 114 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-23 17:05:38,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-23 17:05:38,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-11-23 17:05:38,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.2951048951048951) internal successors, (926), 715 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:38,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 926 transitions. [2021-11-23 17:05:38,249 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 926 transitions. Word has length 123 [2021-11-23 17:05:38,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:05:38,250 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 926 transitions. [2021-11-23 17:05:38,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:38,250 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 926 transitions. [2021-11-23 17:05:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-23 17:05:38,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:05:38,256 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:05:38,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:38,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:05:38,470 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:05:38,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:05:38,471 INFO L85 PathProgramCache]: Analyzing trace with hash -114689602, now seen corresponding path program 1 times [2021-11-23 17:05:38,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:05:38,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831334051] [2021-11-23 17:05:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:38,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:05:38,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:05:38,475 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:05:38,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:05:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:38,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:05:38,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-23 17:05:39,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:05:39,173 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:05:39,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831334051] [2021-11-23 17:05:39,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831334051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:05:39,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:05:39,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:05:39,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948591071] [2021-11-23 17:05:39,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:05:39,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:05:39,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:05:39,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:05:39,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:05:39,177 INFO L87 Difference]: Start difference. First operand 716 states and 926 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:05:44,104 INFO L93 Difference]: Finished difference Result 1786 states and 2393 transitions. [2021-11-23 17:05:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:05:44,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-23 17:05:44,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:05:44,114 INFO L225 Difference]: With dead ends: 1786 [2021-11-23 17:05:44,114 INFO L226 Difference]: Without dead ends: 1250 [2021-11-23 17:05:44,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:05:44,118 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 115 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:05:44,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 120 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-23 17:05:44,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-23 17:05:44,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250. [2021-11-23 17:05:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 1.245796637309848) internal successors, (1556), 1249 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1556 transitions. [2021-11-23 17:05:44,159 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1556 transitions. Word has length 184 [2021-11-23 17:05:44,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:05:44,160 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1556 transitions. [2021-11-23 17:05:44,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:44,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1556 transitions. [2021-11-23 17:05:44,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-23 17:05:44,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:05:44,165 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:05:44,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:44,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:05:44,380 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:05:44,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:05:44,381 INFO L85 PathProgramCache]: Analyzing trace with hash 2139811195, now seen corresponding path program 1 times [2021-11-23 17:05:44,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:05:44,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305569321] [2021-11-23 17:05:44,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:44,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:05:44,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:05:44,385 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:05:44,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:05:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:44,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:05:44,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:05:46,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:05:46,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:05:46,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305569321] [2021-11-23 17:05:46,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305569321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:05:46,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:05:46,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:05:46,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236981360] [2021-11-23 17:05:46,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:05:46,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:05:46,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:05:46,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:05:46,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:05:46,005 INFO L87 Difference]: Start difference. First operand 1250 states and 1556 transitions. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:05:49,116 INFO L93 Difference]: Finished difference Result 2171 states and 2741 transitions. [2021-11-23 17:05:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:05:49,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 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 198 [2021-11-23 17:05:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:05:49,125 INFO L225 Difference]: With dead ends: 2171 [2021-11-23 17:05:49,126 INFO L226 Difference]: Without dead ends: 1072 [2021-11-23 17:05:49,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:05:49,129 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 112 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:05:49,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 113 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 17:05:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-23 17:05:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2021-11-23 17:05:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.239028944911298) internal successors, (1327), 1071 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1327 transitions. [2021-11-23 17:05:49,188 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1327 transitions. Word has length 198 [2021-11-23 17:05:49,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:05:49,188 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1327 transitions. [2021-11-23 17:05:49,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:49,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1327 transitions. [2021-11-23 17:05:49,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-23 17:05:49,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:05:49,194 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:05:49,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:49,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:05:49,407 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:05:49,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:05:49,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1722742746, now seen corresponding path program 1 times [2021-11-23 17:05:49,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:05:49,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254360483] [2021-11-23 17:05:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:49,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:05:49,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:05:49,412 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:05:49,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:05:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:49,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:05:49,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-23 17:05:51,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:05:51,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:05:51,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254360483] [2021-11-23 17:05:51,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254360483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:05:51,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:05:51,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:05:51,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561842205] [2021-11-23 17:05:51,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:05:51,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:05:51,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:05:51,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:05:51,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:05:51,209 INFO L87 Difference]: Start difference. First operand 1072 states and 1327 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:54,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:05:54,575 INFO L93 Difference]: Finished difference Result 1786 states and 2287 transitions. [2021-11-23 17:05:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:05:54,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 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 224 [2021-11-23 17:05:54,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:05:54,584 INFO L225 Difference]: With dead ends: 1786 [2021-11-23 17:05:54,584 INFO L226 Difference]: Without dead ends: 1072 [2021-11-23 17:05:54,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:05:54,587 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 73 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:05:54,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 123 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-23 17:05:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-23 17:05:54,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2021-11-23 17:05:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.2334267040149394) internal successors, (1321), 1071 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:54,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1321 transitions. [2021-11-23 17:05:54,622 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1321 transitions. Word has length 224 [2021-11-23 17:05:54,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:05:54,623 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1321 transitions. [2021-11-23 17:05:54,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:54,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1321 transitions. [2021-11-23 17:05:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-11-23 17:05:54,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:05:54,631 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:05:54,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:54,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:05:54,848 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:05:54,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:05:54,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1080393271, now seen corresponding path program 1 times [2021-11-23 17:05:54,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:05:54,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998313855] [2021-11-23 17:05:54,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:54,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:05:54,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:05:54,852 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:05:54,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:05:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:55,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:05:55,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 140 proven. 135 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:05:56,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:05:57,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:05:57,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998313855] [2021-11-23 17:05:57,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998313855] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:05:57,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:05:57,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:05:57,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486900065] [2021-11-23 17:05:57,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:05:57,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:05:57,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:05:57,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:05:57,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:05:57,865 INFO L87 Difference]: Start difference. First operand 1072 states and 1321 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:07,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:06:07,218 INFO L93 Difference]: Finished difference Result 2142 states and 2812 transitions. [2021-11-23 17:06:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:06:07,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 328 [2021-11-23 17:06:07,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:06:07,229 INFO L225 Difference]: With dead ends: 2142 [2021-11-23 17:06:07,230 INFO L226 Difference]: Without dead ends: 1428 [2021-11-23 17:06:07,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:06:07,232 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 133 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:06:07,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 59 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2021-11-23 17:06:07,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-11-23 17:06:07,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1428. [2021-11-23 17:06:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 1.238262088297127) internal successors, (1767), 1427 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1767 transitions. [2021-11-23 17:06:07,275 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1767 transitions. Word has length 328 [2021-11-23 17:06:07,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:06:07,276 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 1767 transitions. [2021-11-23 17:06:07,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:07,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1767 transitions. [2021-11-23 17:06:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-11-23 17:06:07,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:06:07,289 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:06:07,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:06:07,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:06:07,503 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:06:07,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:06:07,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1673003691, now seen corresponding path program 1 times [2021-11-23 17:06:07,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:06:07,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697227126] [2021-11-23 17:06:07,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:07,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:06:07,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:06:07,511 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:06:07,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:06:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:07,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:06:07,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 417 proven. 159 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-23 17:06:08,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:06:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 576 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-23 17:06:10,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:06:10,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697227126] [2021-11-23 17:06:10,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697227126] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:06:10,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:06:10,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:06:10,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545790503] [2021-11-23 17:06:10,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:06:10,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:06:10,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:06:10,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:06:10,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:06:10,947 INFO L87 Difference]: Start difference. First operand 1428 states and 1767 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:18,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:06:18,625 INFO L93 Difference]: Finished difference Result 3210 states and 4150 transitions. [2021-11-23 17:06:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:06:18,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 439 [2021-11-23 17:06:18,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:06:18,639 INFO L225 Difference]: With dead ends: 3210 [2021-11-23 17:06:18,639 INFO L226 Difference]: Without dead ends: 2140 [2021-11-23 17:06:18,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 873 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:06:18,642 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 113 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:06:18,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 248 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2021-11-23 17:06:18,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-11-23 17:06:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2140. [2021-11-23 17:06:18,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 1.2463768115942029) internal successors, (2666), 2139 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2666 transitions. [2021-11-23 17:06:18,703 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2666 transitions. Word has length 439 [2021-11-23 17:06:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:06:18,704 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 2666 transitions. [2021-11-23 17:06:18,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2666 transitions. [2021-11-23 17:06:18,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-11-23 17:06:18,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:06:18,716 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:06:18,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:06:18,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:06:18,940 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:06:18,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:06:18,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1243691133, now seen corresponding path program 1 times [2021-11-23 17:06:18,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:06:18,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538152275] [2021-11-23 17:06:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:18,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:06:18,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:06:18,944 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:06:18,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:06:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:19,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:06:19,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 0 proven. 653 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-23 17:06:21,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:06:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 481 proven. 172 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-23 17:06:27,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:06:27,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538152275] [2021-11-23 17:06:27,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538152275] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:06:27,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [891867930] [2021-11-23 17:06:27,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:27,438 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:06:27,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:06:27,440 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:06:27,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 17:06:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:27,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:06:27,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 433 proven. 47 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-23 17:06:29,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:06:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 456 proven. 24 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-23 17:06:32,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [891867930] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:06:32,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682982433] [2021-11-23 17:06:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:32,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:06:32,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:06:32,247 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:06:32,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 17:06:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:32,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:06:32,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 336 proven. 144 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-23 17:06:34,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:06:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 336 proven. 144 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-23 17:06:36,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682982433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:06:36,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:06:36,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 7, 4, 4] total 18 [2021-11-23 17:06:36,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940855199] [2021-11-23 17:06:36,979 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:06:36,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 17:06:36,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:06:36,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 17:06:36,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:06:36,985 INFO L87 Difference]: Start difference. First operand 2140 states and 2666 transitions. Second operand has 18 states, 18 states have (on average 50.22222222222222) internal successors, (904), 18 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:46,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:51,000 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:52,281 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:10,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:11,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:14,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:14,181 INFO L93 Difference]: Finished difference Result 5961 states and 7553 transitions. [2021-11-23 17:08:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 17:08:14,187 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 50.22222222222222) internal successors, (904), 18 states have internal predecessors, (904), 0 states have call successors, (0), 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 455 [2021-11-23 17:08:14,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:14,211 INFO L225 Difference]: With dead ends: 5961 [2021-11-23 17:08:14,211 INFO L226 Difference]: Without dead ends: 3920 [2021-11-23 17:08:14,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2749 GetRequests, 2718 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 17:08:14,216 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2464 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 5284 mSolverCounterSat, 1172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2464 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 6456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1172 IncrementalHoareTripleChecker+Valid, 5284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:14,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2464 Valid, 115 Invalid, 6456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1172 Valid, 5284 Invalid, 0 Unknown, 0 Unchecked, 92.5s Time] [2021-11-23 17:08:14,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2021-11-23 17:08:14,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 3564. [2021-11-23 17:08:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3564 states, 3563 states have (on average 1.0836373842267752) internal successors, (3861), 3563 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:14,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 3861 transitions. [2021-11-23 17:08:14,333 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 3861 transitions. Word has length 455 [2021-11-23 17:08:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:14,334 INFO L470 AbstractCegarLoop]: Abstraction has 3564 states and 3861 transitions. [2021-11-23 17:08:14,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 50.22222222222222) internal successors, (904), 18 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:14,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 3861 transitions. [2021-11-23 17:08:14,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-11-23 17:08:14,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:14,364 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:14,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:14,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-23 17:08:14,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:14,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:08:14,967 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:14,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1079575501, now seen corresponding path program 1 times [2021-11-23 17:08:14,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:14,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706778049] [2021-11-23 17:08:14,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:14,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:14,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:14,973 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:14,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:08:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:15,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:08:15,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1349 backedges. 234 proven. 898 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-23 17:08:25,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:08:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1349 backedges. 864 proven. 268 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-23 17:08:57,827 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:57,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706778049] [2021-11-23 17:08:57,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706778049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:08:57,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [520011071] [2021-11-23 17:08:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:57,828 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:08:57,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:08:57,829 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:08:57,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:08:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:58,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:08:58,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1349 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 17:08:59,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:08:59,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [520011071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:08:59,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:08:59,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 10] total 21 [2021-11-23 17:08:59,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137045516] [2021-11-23 17:08:59,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:59,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:08:59,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:59,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:08:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-11-23 17:08:59,425 INFO L87 Difference]: Start difference. First operand 3564 states and 3861 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:09:03,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:09:03,743 INFO L93 Difference]: Finished difference Result 8082 states and 8988 transitions. [2021-11-23 17:09:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:09:03,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 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 703 [2021-11-23 17:09:03,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:09:03,768 INFO L225 Difference]: With dead ends: 8082 [2021-11-23 17:09:03,768 INFO L226 Difference]: Without dead ends: 5232 [2021-11-23 17:09:03,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2108 GetRequests, 2088 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:09:03,774 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 322 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:09:03,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 22 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 17:09:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5232 states. [2021-11-23 17:09:03,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5232 to 5166. [2021-11-23 17:09:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5166 states, 5165 states have (on average 1.094675701839303) internal successors, (5654), 5165 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:09:03,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5166 states to 5166 states and 5654 transitions. [2021-11-23 17:09:03,923 INFO L78 Accepts]: Start accepts. Automaton has 5166 states and 5654 transitions. Word has length 703 [2021-11-23 17:09:03,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:09:03,925 INFO L470 AbstractCegarLoop]: Abstraction has 5166 states and 5654 transitions. [2021-11-23 17:09:03,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:09:03,926 INFO L276 IsEmpty]: Start isEmpty. Operand 5166 states and 5654 transitions. [2021-11-23 17:09:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2021-11-23 17:09:03,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:09:03,937 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:09:03,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-23 17:09:04,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:09:04,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:09:04,353 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:09:04,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:09:04,354 INFO L85 PathProgramCache]: Analyzing trace with hash -287829589, now seen corresponding path program 1 times [2021-11-23 17:09:04,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:09:04,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55610092] [2021-11-23 17:09:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:04,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:09:04,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:09:04,359 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:09:04,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:09:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:04,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:09:04,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 1541 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-23 17:09:16,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:09:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 900 proven. 641 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-23 17:09:44,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:09:44,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55610092] [2021-11-23 17:09:44,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55610092] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:09:44,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1102356528] [2021-11-23 17:09:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:44,122 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:09:44,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:09:44,123 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:09:44,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 17:09:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:45,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:09:45,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 281 proven. 1307 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-23 17:09:48,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:09:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 933 proven. 655 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-23 17:09:56,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1102356528] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:09:56,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080813215] [2021-11-23 17:09:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:56,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:09:56,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:09:56,173 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:09:56,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 17:09:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:56,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:09:56,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 643 proven. 898 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-23 17:09:58,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:10:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 1320 proven. 268 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-23 17:10:04,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080813215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:10:04,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:10:04,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 6, 7, 4, 5] total 29 [2021-11-23 17:10:04,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310148432] [2021-11-23 17:10:04,256 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:10:04,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 17:10:04,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:10:04,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 17:10:04,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=577, Unknown=0, NotChecked=0, Total=812 [2021-11-23 17:10:04,264 INFO L87 Difference]: Start difference. First operand 5166 states and 5654 transitions. Second operand has 29 states, 29 states have (on average 76.65517241379311) internal successors, (2223), 29 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:44,653 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:50,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:10:50,762 INFO L93 Difference]: Finished difference Result 11380 states and 12460 transitions. [2021-11-23 17:10:50,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 17:10:50,764 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 76.65517241379311) internal successors, (2223), 29 states have internal predecessors, (2223), 0 states have call successors, (0), 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 785 [2021-11-23 17:10:50,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:10:50,793 INFO L225 Difference]: With dead ends: 11380 [2021-11-23 17:10:50,793 INFO L226 Difference]: Without dead ends: 6572 [2021-11-23 17:10:50,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4725 GetRequests, 4684 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=529, Invalid=1193, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 17:10:50,800 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3144 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 7429 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3144 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 7857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 7429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:10:50,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3144 Valid, 126 Invalid, 7857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 7429 Invalid, 0 Unknown, 0 Unchecked, 44.5s Time] [2021-11-23 17:10:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6572 states. [2021-11-23 17:10:50,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6572 to 6047. [2021-11-23 17:10:50,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6047 states, 6046 states have (on average 1.0779027456169368) internal successors, (6517), 6046 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:51,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6047 states to 6047 states and 6517 transitions. [2021-11-23 17:10:51,026 INFO L78 Accepts]: Start accepts. Automaton has 6047 states and 6517 transitions. Word has length 785 [2021-11-23 17:10:51,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:10:51,028 INFO L470 AbstractCegarLoop]: Abstraction has 6047 states and 6517 transitions. [2021-11-23 17:10:51,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 76.65517241379311) internal successors, (2223), 29 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:51,030 INFO L276 IsEmpty]: Start isEmpty. Operand 6047 states and 6517 transitions. [2021-11-23 17:10:51,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 965 [2021-11-23 17:10:51,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:10:51,057 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:10:51,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:51,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:51,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-23 17:10:51,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:10:51,663 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:10:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:10:51,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1826834751, now seen corresponding path program 1 times [2021-11-23 17:10:51,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:10:51,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812728203] [2021-11-23 17:10:51,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:51,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:10:51,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:10:51,671 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:10:51,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:10:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:52,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:10:52,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2557 backedges. 1561 proven. 420 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-23 17:11:00,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:11:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2557 backedges. 1981 proven. 0 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-23 17:11:27,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:11:27,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812728203] [2021-11-23 17:11:27,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812728203] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:11:27,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:11:27,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 19 [2021-11-23 17:11:27,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545767674] [2021-11-23 17:11:27,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:11:27,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 17:11:27,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:11:27,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 17:11:27,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:11:27,736 INFO L87 Difference]: Start difference. First operand 6047 states and 6517 transitions. Second operand has 10 states, 10 states have (on average 56.6) internal successors, (566), 10 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:11:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:11:33,236 INFO L93 Difference]: Finished difference Result 11900 states and 12840 transitions. [2021-11-23 17:11:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:11:33,238 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 56.6) internal successors, (566), 10 states have internal predecessors, (566), 0 states have call successors, (0), 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 964 [2021-11-23 17:11:33,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:11:33,270 INFO L225 Difference]: With dead ends: 11900 [2021-11-23 17:11:33,270 INFO L226 Difference]: Without dead ends: 6202 [2021-11-23 17:11:33,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1926 GetRequests, 1909 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:11:33,278 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 319 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:11:33,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 240 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-23 17:11:33,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6202 states. [2021-11-23 17:11:33,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6202 to 6202. [2021-11-23 17:11:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6202 states, 6201 states have (on average 1.0749879051765845) internal successors, (6666), 6201 states have internal predecessors, (6666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:11:33,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6202 states to 6202 states and 6666 transitions. [2021-11-23 17:11:33,416 INFO L78 Accepts]: Start accepts. Automaton has 6202 states and 6666 transitions. Word has length 964 [2021-11-23 17:11:33,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:11:33,417 INFO L470 AbstractCegarLoop]: Abstraction has 6202 states and 6666 transitions. [2021-11-23 17:11:33,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.6) internal successors, (566), 10 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:11:33,418 INFO L276 IsEmpty]: Start isEmpty. Operand 6202 states and 6666 transitions. [2021-11-23 17:11:33,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1042 [2021-11-23 17:11:33,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:11:33,454 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:11:33,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:11:33,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:11:33,673 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:11:33,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:11:33,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1004294170, now seen corresponding path program 1 times [2021-11-23 17:11:33,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:11:33,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944726809] [2021-11-23 17:11:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:33,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:11:33,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:11:33,684 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:11:33,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:11:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:34,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:11:34,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 481 proven. 2285 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2021-11-23 17:11:42,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:12:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 2075 proven. 118 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-11-23 17:12:08,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:08,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944726809] [2021-11-23 17:12:08,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944726809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:12:08,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [430742675] [2021-11-23 17:12:08,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:08,092 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:12:08,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:12:08,093 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:12:08,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 17:12:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:08,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:12:08,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 1142 proven. 47 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2021-11-23 17:12:14,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:12:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 1142 proven. 47 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2021-11-23 17:12:19,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [430742675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:12:19,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861140160] [2021-11-23 17:12:19,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:19,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:12:19,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:12:19,008 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:12:19,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 17:12:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:19,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:12:19,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 375 proven. 0 refuted. 0 times theorem prover too weak. 2762 trivial. 0 not checked. [2021-11-23 17:12:23,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:23,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861140160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:23,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:12:23,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12, 11, 8, 8] total 35 [2021-11-23 17:12:23,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999830567] [2021-11-23 17:12:23,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:23,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:12:23,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:23,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:12:23,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 17:12:23,093 INFO L87 Difference]: Start difference. First operand 6202 states and 6666 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 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) [2021-11-23 17:12:25,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:25,586 INFO L93 Difference]: Finished difference Result 11888 states and 12788 transitions. [2021-11-23 17:12:25,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:12:25,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 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) Word has length 1041 [2021-11-23 17:12:25,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:25,603 INFO L225 Difference]: With dead ends: 11888 [2021-11-23 17:12:25,604 INFO L226 Difference]: Without dead ends: 6024 [2021-11-23 17:12:25,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5200 GetRequests, 5167 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 17:12:25,611 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:25,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 17 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 17:12:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6024 states. [2021-11-23 17:12:25,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6024 to 6024. [2021-11-23 17:12:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6024 states, 6023 states have (on average 1.0698987215673252) internal successors, (6444), 6023 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:25,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 6444 transitions. [2021-11-23 17:12:25,751 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 6444 transitions. Word has length 1041 [2021-11-23 17:12:25,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:25,752 INFO L470 AbstractCegarLoop]: Abstraction has 6024 states and 6444 transitions. [2021-11-23 17:12:25,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 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) [2021-11-23 17:12:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 6444 transitions. [2021-11-23 17:12:25,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1076 [2021-11-23 17:12:25,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:25,773 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:12:25,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:25,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:26,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-23 17:12:26,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:26,380 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:26,381 INFO L85 PathProgramCache]: Analyzing trace with hash 112196390, now seen corresponding path program 1 times [2021-11-23 17:12:26,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:26,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653767849] [2021-11-23 17:12:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:26,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:26,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:26,402 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:26,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:12:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:26,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:12:26,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3728 backedges. 1015 proven. 2295 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2021-11-23 17:12:36,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:12:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3728 backedges. 2608 proven. 129 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2021-11-23 17:12:55,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:55,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653767849] [2021-11-23 17:12:55,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653767849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:12:55,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1129357513] [2021-11-23 17:12:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:55,267 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:12:55,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:12:55,274 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:12:55,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 17:12:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:56,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:12:56,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3728 backedges. 1062 proven. 0 refuted. 0 times theorem prover too weak. 2666 trivial. 0 not checked. [2021-11-23 17:12:58,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:58,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1129357513] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:58,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:12:58,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13, 12] total 24 [2021-11-23 17:12:58,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489398] [2021-11-23 17:12:58,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:58,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:58,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:58,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:58,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-11-23 17:12:58,077 INFO L87 Difference]: Start difference. First operand 6024 states and 6444 transitions. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:00,836 INFO L93 Difference]: Finished difference Result 12758 states and 13719 transitions. [2021-11-23 17:13:00,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:13:00,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 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 1075 [2021-11-23 17:13:00,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:00,862 INFO L225 Difference]: With dead ends: 12758 [2021-11-23 17:13:00,862 INFO L226 Difference]: Without dead ends: 7092 [2021-11-23 17:13:00,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3222 GetRequests, 3200 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-11-23 17:13:00,869 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 97 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:00,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 231 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 17:13:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7092 states. [2021-11-23 17:13:00,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7092 to 6914. [2021-11-23 17:13:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6914 states, 6913 states have (on average 1.0691450889628236) internal successors, (7391), 6913 states have internal predecessors, (7391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6914 states to 6914 states and 7391 transitions. [2021-11-23 17:13:01,083 INFO L78 Accepts]: Start accepts. Automaton has 6914 states and 7391 transitions. Word has length 1075 [2021-11-23 17:13:01,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:01,084 INFO L470 AbstractCegarLoop]: Abstraction has 6914 states and 7391 transitions. [2021-11-23 17:13:01,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:01,085 INFO L276 IsEmpty]: Start isEmpty. Operand 6914 states and 7391 transitions. [2021-11-23 17:13:01,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1158 [2021-11-23 17:13:01,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:01,110 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:01,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:01,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:01,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:13:01,534 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:01,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:01,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1259006014, now seen corresponding path program 1 times [2021-11-23 17:13:01,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:01,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239844709] [2021-11-23 17:13:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:01,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:01,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:01,544 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:01,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 17:13:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:02,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 1278 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:13:02,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4552 backedges. 1795 proven. 2210 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2021-11-23 17:13:05,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4552 backedges. 3335 proven. 97 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-11-23 17:13:11,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:11,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239844709] [2021-11-23 17:13:11,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239844709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:11,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [258260557] [2021-11-23 17:13:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:11,215 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:13:11,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:13:11,216 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:13:11,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-23 17:13:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:11,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 1278 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:13:11,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4552 backedges. 1899 proven. 0 refuted. 0 times theorem prover too weak. 2653 trivial. 0 not checked. [2021-11-23 17:13:14,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:13:14,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [258260557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:13:14,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:13:14,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 5] total 14 [2021-11-23 17:13:14,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127597436] [2021-11-23 17:13:14,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:13:14,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:13:14,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:14,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:13:14,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:13:14,507 INFO L87 Difference]: Start difference. First operand 6914 states and 7391 transitions. Second operand has 6 states, 6 states have (on average 58.666666666666664) internal successors, (352), 6 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:17,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:17,119 INFO L93 Difference]: Finished difference Result 13164 states and 14082 transitions. [2021-11-23 17:13:17,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:13:17,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 58.666666666666664) internal successors, (352), 6 states have internal predecessors, (352), 0 states have call successors, (0), 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 1157 [2021-11-23 17:13:17,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:17,136 INFO L225 Difference]: With dead ends: 13164 [2021-11-23 17:13:17,136 INFO L226 Difference]: Without dead ends: 6380 [2021-11-23 17:13:17,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3468 GetRequests, 3456 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:13:17,144 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 120 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:17,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 252 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 17:13:17,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6380 states. [2021-11-23 17:13:17,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6380 to 6380. [2021-11-23 17:13:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6380 states, 6379 states have (on average 1.064743690233579) internal successors, (6792), 6379 states have internal predecessors, (6792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:17,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6380 states to 6380 states and 6792 transitions. [2021-11-23 17:13:17,278 INFO L78 Accepts]: Start accepts. Automaton has 6380 states and 6792 transitions. Word has length 1157 [2021-11-23 17:13:17,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:17,280 INFO L470 AbstractCegarLoop]: Abstraction has 6380 states and 6792 transitions. [2021-11-23 17:13:17,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.666666666666664) internal successors, (352), 6 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 6380 states and 6792 transitions. [2021-11-23 17:13:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1161 [2021-11-23 17:13:17,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:17,347 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:17,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:17,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-23 17:13:17,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:17,748 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:17,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:17,748 INFO L85 PathProgramCache]: Analyzing trace with hash 703465302, now seen corresponding path program 1 times [2021-11-23 17:13:17,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:17,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300477628] [2021-11-23 17:13:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:17,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:17,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:17,761 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:17,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 17:13:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:18,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:13:18,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4570 backedges. 1798 proven. 2225 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2021-11-23 17:13:21,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4570 backedges. 3350 proven. 100 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-11-23 17:13:27,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:27,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300477628] [2021-11-23 17:13:27,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300477628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:27,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [674913924] [2021-11-23 17:13:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:27,409 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:13:27,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:13:27,426 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:13:27,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-23 17:13:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:28,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:13:28,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4570 backedges. 2468 proven. 22 refuted. 0 times theorem prover too weak. 2080 trivial. 0 not checked. [2021-11-23 17:13:31,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4570 backedges. 2468 proven. 22 refuted. 0 times theorem prover too weak. 2080 trivial. 0 not checked. [2021-11-23 17:13:34,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [674913924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:34,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865690998] [2021-11-23 17:13:34,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:34,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:13:34,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:13:34,316 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:13:34,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 17:13:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:34,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:13:34,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4570 backedges. 1842 proven. 0 refuted. 0 times theorem prover too weak. 2728 trivial. 0 not checked. [2021-11-23 17:13:38,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:13:38,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865690998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:13:38,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:13:38,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 5, 6, 6] total 18 [2021-11-23 17:13:38,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891107796] [2021-11-23 17:13:38,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:13:38,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:13:38,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:38,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:13:38,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:13:38,481 INFO L87 Difference]: Start difference. First operand 6380 states and 6792 transitions. Second operand has 4 states, 4 states have (on average 79.25) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:40,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:40,695 INFO L93 Difference]: Finished difference Result 12424 states and 13245 transitions. [2021-11-23 17:13:40,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:13:40,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 1160 [2021-11-23 17:13:40,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:40,709 INFO L225 Difference]: With dead ends: 12424 [2021-11-23 17:13:40,709 INFO L226 Difference]: Without dead ends: 6380 [2021-11-23 17:13:40,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5795 GetRequests, 5777 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:13:40,717 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:40,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 17:13:40,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6380 states. [2021-11-23 17:13:40,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6380 to 6380. [2021-11-23 17:13:40,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6380 states, 6379 states have (on average 1.0616084025709358) internal successors, (6772), 6379 states have internal predecessors, (6772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:40,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6380 states to 6380 states and 6772 transitions. [2021-11-23 17:13:40,847 INFO L78 Accepts]: Start accepts. Automaton has 6380 states and 6772 transitions. Word has length 1160 [2021-11-23 17:13:40,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:40,848 INFO L470 AbstractCegarLoop]: Abstraction has 6380 states and 6772 transitions. [2021-11-23 17:13:40,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:40,849 INFO L276 IsEmpty]: Start isEmpty. Operand 6380 states and 6772 transitions. [2021-11-23 17:13:40,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1175 [2021-11-23 17:13:40,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:40,871 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:40,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:41,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-23 17:13:41,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:41,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:41,474 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:41,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:41,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1931049465, now seen corresponding path program 1 times [2021-11-23 17:13:41,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:41,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747805317] [2021-11-23 17:13:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:41,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:41,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:41,484 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:41,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 17:13:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:41,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:13:41,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4630 backedges. 1144 proven. 2960 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2021-11-23 17:13:47,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4630 backedges. 3093 proven. 438 refuted. 0 times theorem prover too weak. 1099 trivial. 0 not checked. [2021-11-23 17:13:58,120 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:58,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747805317] [2021-11-23 17:13:58,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747805317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:58,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1773333121] [2021-11-23 17:13:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:58,120 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:13:58,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:13:58,121 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:13:58,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-23 17:13:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:58,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:13:58,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4630 backedges. 2553 proven. 82 refuted. 0 times theorem prover too weak. 1995 trivial. 0 not checked. [2021-11-23 17:14:04,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:14:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4630 backedges. 1935 proven. 0 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2021-11-23 17:14:07,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1773333121] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:14:07,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 17:14:07,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 5, 7] total 16 [2021-11-23 17:14:07,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766417299] [2021-11-23 17:14:07,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:07,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:14:07,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:07,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:14:07,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:14:07,887 INFO L87 Difference]: Start difference. First operand 6380 states and 6772 transitions. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:10,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:10,792 INFO L93 Difference]: Finished difference Result 13292 states and 14169 transitions. [2021-11-23 17:14:10,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:14:10,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 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 1174 [2021-11-23 17:14:10,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:10,807 INFO L225 Difference]: With dead ends: 13292 [2021-11-23 17:14:10,808 INFO L226 Difference]: Without dead ends: 7270 [2021-11-23 17:14:10,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4692 GetRequests, 4678 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:14:10,815 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 77 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:10,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 36 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 17:14:10,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7270 states. [2021-11-23 17:14:10,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7270 to 6914. [2021-11-23 17:14:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6914 states, 6913 states have (on average 1.0572833791407492) internal successors, (7309), 6913 states have internal predecessors, (7309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:11,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6914 states to 6914 states and 7309 transitions. [2021-11-23 17:14:11,008 INFO L78 Accepts]: Start accepts. Automaton has 6914 states and 7309 transitions. Word has length 1174 [2021-11-23 17:14:11,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:11,009 INFO L470 AbstractCegarLoop]: Abstraction has 6914 states and 7309 transitions. [2021-11-23 17:14:11,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 6914 states and 7309 transitions. [2021-11-23 17:14:11,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1184 [2021-11-23 17:14:11,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:11,034 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:11,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:11,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:11,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:14:11,455 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:11,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1649728927, now seen corresponding path program 1 times [2021-11-23 17:14:11,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:11,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430163230] [2021-11-23 17:14:11,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:11,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:11,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:11,463 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:11,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 17:14:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:12,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:14:12,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4648 backedges. 1806 proven. 2295 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2021-11-23 17:14:21,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:14:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4648 backedges. 3399 proven. 129 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-11-23 17:14:40,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:40,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430163230] [2021-11-23 17:14:40,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430163230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:14:40,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1231730332] [2021-11-23 17:14:40,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:40,822 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:14:40,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:14:40,823 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:14:40,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-23 17:14:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:41,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:14:41,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4648 backedges. 2535 proven. 108 refuted. 0 times theorem prover too weak. 2005 trivial. 0 not checked. [2021-11-23 17:14:50,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:14:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4648 backedges. 1935 proven. 0 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2021-11-23 17:14:54,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1231730332] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:14:54,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 17:14:54,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13, 12, 9] total 31 [2021-11-23 17:14:54,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233340617] [2021-11-23 17:14:54,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:54,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:14:54,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:54,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:14:54,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-11-23 17:14:54,505 INFO L87 Difference]: Start difference. First operand 6914 states and 7309 transitions. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:56,725 INFO L93 Difference]: Finished difference Result 14182 states and 15050 transitions. [2021-11-23 17:14:56,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:14:56,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 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 1183 [2021-11-23 17:14:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:56,741 INFO L225 Difference]: With dead ends: 14182 [2021-11-23 17:14:56,741 INFO L226 Difference]: Without dead ends: 7626 [2021-11-23 17:14:56,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4728 GetRequests, 4699 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-11-23 17:14:56,749 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:56,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 20 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 17:14:56,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-11-23 17:14:56,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 7092. [2021-11-23 17:14:56,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7092 states, 7091 states have (on average 1.0609222958680018) internal successors, (7523), 7091 states have internal predecessors, (7523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7092 states to 7092 states and 7523 transitions. [2021-11-23 17:14:56,888 INFO L78 Accepts]: Start accepts. Automaton has 7092 states and 7523 transitions. Word has length 1183 [2021-11-23 17:14:56,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:56,889 INFO L470 AbstractCegarLoop]: Abstraction has 7092 states and 7523 transitions. [2021-11-23 17:14:56,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 7092 states and 7523 transitions. [2021-11-23 17:14:56,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1197 [2021-11-23 17:14:56,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:56,912 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:56,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:57,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:57,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:57,325 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:57,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1047532179, now seen corresponding path program 1 times [2021-11-23 17:14:57,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:57,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728280379] [2021-11-23 17:14:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:57,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:57,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:57,335 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:57,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 17:14:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:57,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:14:57,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 1850 proven. 2295 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2021-11-23 17:15:07,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:15:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 3443 proven. 129 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-11-23 17:15:27,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:27,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728280379] [2021-11-23 17:15:27,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728280379] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:15:27,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1872149711] [2021-11-23 17:15:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:27,324 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:15:27,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:15:27,326 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:15:27,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-23 17:15:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:28,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:15:28,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 2687 proven. 620 refuted. 0 times theorem prover too weak. 1385 trivial. 0 not checked. [2021-11-23 17:15:58,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 2753 proven. 554 refuted. 0 times theorem prover too weak. 1385 trivial. 0 not checked. [2021-11-23 17:16:07,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1872149711] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:07,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868548089] [2021-11-23 17:16:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:07,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:07,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:07,272 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:07,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 17:16:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:07,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:16:07,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 3090 proven. 123 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2021-11-23 17:16:30,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 3090 proven. 123 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2021-11-23 17:16:33,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868548089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:33,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:33,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8, 9, 4, 4] total 35 [2021-11-23 17:16:33,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661700765] [2021-11-23 17:16:33,515 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:33,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 17:16:33,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:33,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 17:16:33,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=903, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 17:16:33,520 INFO L87 Difference]: Start difference. First operand 7092 states and 7523 transitions. Second operand has 35 states, 35 states have (on average 66.74285714285715) internal successors, (2336), 35 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:51,873 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:16:53,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:17:11,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:17:16,004 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:17:19,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:19,205 INFO L93 Difference]: Finished difference Result 16803 states and 17766 transitions. [2021-11-23 17:17:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-23 17:17:19,206 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 66.74285714285715) internal successors, (2336), 35 states have internal predecessors, (2336), 0 states have call successors, (0), 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 1196 [2021-11-23 17:17:19,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:19,207 INFO L225 Difference]: With dead ends: 16803 [2021-11-23 17:17:19,207 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 17:17:19,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7233 GetRequests, 7155 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=1264, Invalid=3992, Unknown=0, NotChecked=0, Total=5256 [2021-11-23 17:17:19,216 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 6021 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 8978 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6021 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 15416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 8978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5990 IncrementalHoareTripleChecker+Unchecked, 33.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:19,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6021 Valid, 221 Invalid, 15416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 8978 Invalid, 0 Unknown, 5990 Unchecked, 33.7s Time] [2021-11-23 17:17:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 17:17:19,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 17:17:19,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:19,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 17:17:19,218 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1196 [2021-11-23 17:17:19,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:19,219 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 17:17:19,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 66.74285714285715) internal successors, (2336), 35 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:19,219 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 17:17:19,219 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 17:17:19,222 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 17:17:19,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-11-23 17:17:19,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:19,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:19,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1e03c6-c44e-4795-a5d8-e9ac5547b321/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:19,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 17:17:28,495 WARN L227 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 278 DAG size of output: 51 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)