./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH --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 b879e9957df47aa9212d1bcb19c90b87b865d954f1a44f3c044747ce0553d2eb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:45:15,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:45:15,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:45:15,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:45:15,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:45:15,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:45:15,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:45:15,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:45:15,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:45:15,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:45:15,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:45:15,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:45:15,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:45:15,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:45:15,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:45:15,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:45:15,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:45:15,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:45:15,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:45:15,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:45:15,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:45:15,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:45:15,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:45:15,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:45:15,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:45:15,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:45:15,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:45:15,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:45:15,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:45:15,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:45:15,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:45:15,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:45:15,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:45:15,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:45:15,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:45:15,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:45:15,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:45:15,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:45:15,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:45:15,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:45:15,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:45:15,894 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:45:15,934 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:45:15,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:45:15,936 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:45:15,936 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:45:15,937 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:45:15,937 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:45:15,937 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:45:15,937 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:45:15,938 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:45:15,938 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:45:15,939 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:45:15,939 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:45:15,940 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:45:15,940 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:45:15,940 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:45:15,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:45:15,941 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:45:15,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:45:15,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:45:15,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:45:15,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:45:15,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:45:15,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:45:15,943 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:45:15,944 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:45:15,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:45:15,944 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:45:15,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:45:15,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:45:15,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:45:15,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:45:15,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:45:15,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:45:15,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:45:15,948 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:45:15,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:45:15,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:45:15,949 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:45:15,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:45:15,950 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_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b879e9957df47aa9212d1bcb19c90b87b865d954f1a44f3c044747ce0553d2eb [2021-11-03 05:45:16,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:45:16,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:45:16,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:45:16,298 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:45:16,299 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:45:16,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i [2021-11-03 05:45:16,374 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/data/e6abef1e1/0bebe1fb1d2d4068beed1d0323e0aa99/FLAG246f2a1c2 [2021-11-03 05:45:16,908 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:45:16,909 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i [2021-11-03 05:45:16,917 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/data/e6abef1e1/0bebe1fb1d2d4068beed1d0323e0aa99/FLAG246f2a1c2 [2021-11-03 05:45:17,270 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/data/e6abef1e1/0bebe1fb1d2d4068beed1d0323e0aa99 [2021-11-03 05:45:17,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:45:17,274 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:45:17,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:45:17,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:45:17,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:45:17,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:45:17" (1/1) ... [2021-11-03 05:45:17,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@502ca18e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:17, skipping insertion in model container [2021-11-03 05:45:17,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:45:17" (1/1) ... [2021-11-03 05:45:17,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:45:17,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:45:17,480 WARN L228 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_da7da7c6-d522-4d54-a1c9-956196751cec/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i[950,963] [2021-11-03 05:45:17,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:45:17,501 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:45:17,511 WARN L228 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_da7da7c6-d522-4d54-a1c9-956196751cec/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i[950,963] [2021-11-03 05:45:17,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:45:17,530 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:45:17,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:17 WrapperNode [2021-11-03 05:45:17,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:45:17,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:45:17,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:45:17,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:45:17,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:17" (1/1) ... [2021-11-03 05:45:17,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:17" (1/1) ... [2021-11-03 05:45:17,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:45:17,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:45:17,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:45:17,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:45:17,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:17" (1/1) ... [2021-11-03 05:45:17,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:17" (1/1) ... [2021-11-03 05:45:17,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:17" (1/1) ... [2021-11-03 05:45:17,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:17" (1/1) ... [2021-11-03 05:45:17,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:17" (1/1) ... [2021-11-03 05:45:17,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:17" (1/1) ... [2021-11-03 05:45:17,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:17" (1/1) ... [2021-11-03 05:45:17,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:45:17,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:45:17,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:45:17,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:45:17,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:17" (1/1) ... [2021-11-03 05:45:17,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:45:17,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:45:17,631 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:45:17,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:45:17,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:45:17,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:45:17,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:45:17,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:45:20,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:45:20,136 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-03 05:45:20,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:45:20 BoogieIcfgContainer [2021-11-03 05:45:20,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:45:20,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:45:20,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:45:20,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:45:20,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:45:17" (1/3) ... [2021-11-03 05:45:20,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b630491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:45:20, skipping insertion in model container [2021-11-03 05:45:20,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:17" (2/3) ... [2021-11-03 05:45:20,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b630491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:45:20, skipping insertion in model container [2021-11-03 05:45:20,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:45:20" (3/3) ... [2021-11-03 05:45:20,147 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound10.i [2021-11-03 05:45:20,151 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:45:20,151 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-03 05:45:20,192 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:45:20,199 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 [2021-11-03 05:45:20,199 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-03 05:45:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:20,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 05:45:20,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:20,218 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 05:45:20,219 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:45:20,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:20,224 INFO L85 PathProgramCache]: Analyzing trace with hash -769700853, now seen corresponding path program 1 times [2021-11-03 05:45:20,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:20,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987322946] [2021-11-03 05:45:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:20,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:20,454 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:20,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987322946] [2021-11-03 05:45:20,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987322946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:20,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:20,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:45:20,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700108025] [2021-11-03 05:45:20,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:45:20,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:20,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:45:20,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:45:20,482 INFO L87 Difference]: Start difference. First operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:20,507 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-11-03 05:45:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:45:20,508 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-03 05:45:20,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:20,516 INFO L225 Difference]: With dead ends: 28 [2021-11-03 05:45:20,517 INFO L226 Difference]: Without dead ends: 14 [2021-11-03 05:45:20,519 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:45:20,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-03 05:45:20,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-03 05:45:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:20,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-03 05:45:20,550 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 6 [2021-11-03 05:45:20,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:20,550 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-03 05:45:20,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:20,551 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-03 05:45:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-03 05:45:20,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:20,551 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:20,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:45:20,552 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:45:20,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:20,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1525818212, now seen corresponding path program 1 times [2021-11-03 05:45:20,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:20,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341967138] [2021-11-03 05:45:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:20,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:20,616 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:20,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341967138] [2021-11-03 05:45:20,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341967138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:20,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:20,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:45:20,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824420820] [2021-11-03 05:45:20,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:45:20,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:20,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:45:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:45:20,621 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:20,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:20,644 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-11-03 05:45:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:45:20,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-03 05:45:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:20,645 INFO L225 Difference]: With dead ends: 26 [2021-11-03 05:45:20,645 INFO L226 Difference]: Without dead ends: 16 [2021-11-03 05:45:20,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:45:20,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-03 05:45:20,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-03 05:45:20,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-03 05:45:20,650 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 7 [2021-11-03 05:45:20,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:20,650 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-03 05:45:20,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:20,651 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-03 05:45:20,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:45:20,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:20,652 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:20,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:45:20,652 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:45:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:20,653 INFO L85 PathProgramCache]: Analyzing trace with hash 104519077, now seen corresponding path program 1 times [2021-11-03 05:45:20,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:20,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531787532] [2021-11-03 05:45:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:20,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:20,671 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:45:20,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317118091] [2021-11-03 05:45:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:20,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:20,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:45:20,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:45:20,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 05:45:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:20,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 05:45:20,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:21,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:21,179 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:21,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531787532] [2021-11-03 05:45:21,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:45:21,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317118091] [2021-11-03 05:45:21,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317118091] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:21,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:21,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:45:21,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57217063] [2021-11-03 05:45:21,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:45:21,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:21,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:45:21,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:45:21,182 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:23,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:23,517 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-11-03 05:45:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:45:23,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 8 [2021-11-03 05:45:23,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:23,519 INFO L225 Difference]: With dead ends: 41 [2021-11-03 05:45:23,519 INFO L226 Difference]: Without dead ends: 31 [2021-11-03 05:45:23,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:45:23,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-03 05:45:23,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2021-11-03 05:45:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-11-03 05:45:23,524 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 8 [2021-11-03 05:45:23,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:23,525 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-11-03 05:45:23,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:23,525 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-11-03 05:45:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 05:45:23,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:23,526 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:23,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:23,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:23,743 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:45:23,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:23,743 INFO L85 PathProgramCache]: Analyzing trace with hash 653378868, now seen corresponding path program 1 times [2021-11-03 05:45:23,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:23,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217023530] [2021-11-03 05:45:23,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:23,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:23,759 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:45:23,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386080357] [2021-11-03 05:45:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:23,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:23,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:45:23,762 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:45:23,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 05:45:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:23,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:45:23,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:23,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:23,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:23,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217023530] [2021-11-03 05:45:23,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:45:23,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386080357] [2021-11-03 05:45:23,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386080357] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:23,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:23,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:45:23,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704658206] [2021-11-03 05:45:23,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:45:23,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:23,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:45:23,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:45:23,976 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:24,007 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-11-03 05:45:24,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:45:24,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 12 [2021-11-03 05:45:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:24,010 INFO L225 Difference]: With dead ends: 42 [2021-11-03 05:45:24,010 INFO L226 Difference]: Without dead ends: 28 [2021-11-03 05:45:24,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:45:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-03 05:45:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-11-03 05:45:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:24,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-03 05:45:24,015 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 12 [2021-11-03 05:45:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:24,016 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-03 05:45:24,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-03 05:45:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 05:45:24,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:24,017 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:24,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:24,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:24,218 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:45:24,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:24,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1136214436, now seen corresponding path program 1 times [2021-11-03 05:45:24,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:24,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811355439] [2021-11-03 05:45:24,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:24,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:24,237 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:45:24,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821411609] [2021-11-03 05:45:24,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:24,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:24,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:45:24,244 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:45:24,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 05:45:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:24,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:45:24,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:24,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:24,529 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:24,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811355439] [2021-11-03 05:45:24,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:45:24,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821411609] [2021-11-03 05:45:24,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821411609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:45:24,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1345157415] [2021-11-03 05:45:24,549 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 05:45:24,550 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:45:24,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:45:24,558 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:45:24,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:45:24,591 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:24,595 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:24,596 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:24,597 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-03 05:45:24,600 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:24,602 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:24,602 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 05:45:24,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 133 [2021-11-03 05:45:24,631 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_24|], 10=[|v_#valid_25|]} [2021-11-03 05:45:24,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:24,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-03 05:45:24,659 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:24,660 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 05:45:24,660 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:24,661 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 05:45:24,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:24,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:45:24,676 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:24,677 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:24,677 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:24,678 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:24,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:24,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:24,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:24,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:24,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:24,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:24,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:24,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-03 05:45:24,764 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:24,767 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:45:24,768 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:24,769 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:45:24,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:24,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:24,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:24,800 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:24,802 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-03 05:45:24,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:45:24,803 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:238, output treesize:103 [2021-11-03 05:45:24,816 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:24,825 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-11-03 05:45:24,833 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.3 percent of original size [2021-11-03 05:45:24,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-03 05:45:24,844 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:24,851 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-11-03 05:45:24,857 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:24,865 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-03 05:45:24,870 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-11-03 05:45:24,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-11-03 05:45:24,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:24,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:24,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:24,987 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:25,000 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 294 [2021-11-03 05:45:25,021 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:25,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 299 [2021-11-03 05:45:25,037 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:25,047 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 299 [2021-11-03 05:45:25,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,119 INFO L180 QuantifierPusher]: treesize reduction 36, result has 58.1 percent of original size [2021-11-03 05:45:25,122 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:45:25,124 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:25,133 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-03 05:45:25,136 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:25,142 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-03 05:45:25,150 INFO L180 QuantifierPusher]: treesize reduction 36, result has 58.1 percent of original size [2021-11-03 05:45:25,153 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:45:25,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,272 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:25,290 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 261 [2021-11-03 05:45:25,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:25,386 INFO L180 QuantifierPusher]: treesize reduction 4, result has 98.1 percent of original size [2021-11-03 05:45:25,397 INFO L185 QuantifierPusher]: treesize reduction 39, result has 57.1 percent of original size 52 [2021-11-03 05:45:25,405 INFO L180 QuantifierPusher]: treesize reduction 39, result has 61.0 percent of original size [2021-11-03 05:45:25,407 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-03 05:45:25,412 INFO L180 QuantifierPusher]: treesize reduction 95, result has 1.0 percent of original size [2021-11-03 05:45:25,412 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:25,413 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:45:26,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1345157415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:26,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:45:26,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 14 [2021-11-03 05:45:26,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496326171] [2021-11-03 05:45:26,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:45:26,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:26,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:45:26,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:45:26,661 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:29,581 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-11-03 05:45:29,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:45:29,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 05:45:29,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:29,582 INFO L225 Difference]: With dead ends: 54 [2021-11-03 05:45:29,582 INFO L226 Difference]: Without dead ends: 40 [2021-11-03 05:45:29,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-03 05:45:29,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-03 05:45:29,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2021-11-03 05:45:29,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:29,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-03 05:45:29,588 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2021-11-03 05:45:29,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:29,589 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-03 05:45:29,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:29,589 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-03 05:45:29,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 05:45:29,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:29,590 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:29,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:29,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:29,806 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:45:29,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:29,807 INFO L85 PathProgramCache]: Analyzing trace with hash 862871494, now seen corresponding path program 1 times [2021-11-03 05:45:29,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:29,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778960659] [2021-11-03 05:45:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:29,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:29,833 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:45:29,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746674815] [2021-11-03 05:45:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:29,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:29,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:45:29,836 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:45:29,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 05:45:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:29,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:45:29,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:29,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:30,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:30,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778960659] [2021-11-03 05:45:30,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:45:30,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746674815] [2021-11-03 05:45:30,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746674815] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:45:30,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [334489925] [2021-11-03 05:45:30,082 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-03 05:45:30,082 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:45:30,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:45:30,082 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:45:30,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:45:30,090 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,091 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:30,092 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,092 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-03 05:45:30,093 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:30,093 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,094 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 05:45:30,096 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 133 [2021-11-03 05:45:30,100 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_25|], 10=[|v_#valid_26|]} [2021-11-03 05:45:30,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:30,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-03 05:45:30,117 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,118 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 05:45:30,118 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,119 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 05:45:30,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:30,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:45:30,126 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,126 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:30,126 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,127 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:30,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:30,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:30,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:30,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:30,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:30,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-03 05:45:30,149 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,152 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:45:30,152 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,153 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:45:30,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:30,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,159 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,160 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-03 05:45:30,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:45:30,161 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:238, output treesize:103 [2021-11-03 05:45:30,166 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,168 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-11-03 05:45:30,173 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.3 percent of original size [2021-11-03 05:45:30,176 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-03 05:45:30,178 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,181 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-11-03 05:45:30,183 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,185 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-11-03 05:45:30,188 INFO L180 QuantifierPusher]: treesize reduction 5, result has 95.9 percent of original size [2021-11-03 05:45:30,191 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-11-03 05:45:30,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,247 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,254 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 294 [2021-11-03 05:45:30,259 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,266 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 299 [2021-11-03 05:45:30,271 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,278 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 299 [2021-11-03 05:45:30,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,341 INFO L180 QuantifierPusher]: treesize reduction 36, result has 58.1 percent of original size [2021-11-03 05:45:30,343 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 05:45:30,345 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,346 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-03 05:45:30,348 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,349 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-03 05:45:30,355 INFO L180 QuantifierPusher]: treesize reduction 36, result has 58.1 percent of original size [2021-11-03 05:45:30,357 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:45:30,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,434 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:30,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 261 [2021-11-03 05:45:30,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:30,504 INFO L180 QuantifierPusher]: treesize reduction 4, result has 98.1 percent of original size [2021-11-03 05:45:30,510 INFO L185 QuantifierPusher]: treesize reduction 39, result has 57.1 percent of original size 52 [2021-11-03 05:45:30,515 INFO L180 QuantifierPusher]: treesize reduction 39, result has 61.0 percent of original size [2021-11-03 05:45:30,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-03 05:45:30,520 INFO L180 QuantifierPusher]: treesize reduction 4, result has 93.5 percent of original size [2021-11-03 05:45:30,522 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:45:30,530 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:45:31,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:45:31,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:45:31,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-03 05:45:31,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065548877] [2021-11-03 05:45:31,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:45:31,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:31,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:45:31,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-11-03 05:45:31,845 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:32,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:32,010 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2021-11-03 05:45:32,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 05:45:32,010 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-03 05:45:32,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:32,011 INFO L225 Difference]: With dead ends: 64 [2021-11-03 05:45:32,011 INFO L226 Difference]: Without dead ends: 58 [2021-11-03 05:45:32,012 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-11-03 05:45:32,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-03 05:45:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2021-11-03 05:45:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-11-03 05:45:32,022 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 14 [2021-11-03 05:45:32,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:32,022 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-11-03 05:45:32,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:32,025 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-11-03 05:45:32,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 05:45:32,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:32,026 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:32,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:32,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:32,227 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:45:32,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:32,227 INFO L85 PathProgramCache]: Analyzing trace with hash 911703909, now seen corresponding path program 1 times [2021-11-03 05:45:32,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:32,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540868082] [2021-11-03 05:45:32,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:32,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:32,247 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:45:32,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416830982] [2021-11-03 05:45:32,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:32,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:32,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:45:32,253 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:45:32,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 05:45:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:32,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-03 05:45:32,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:33,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:33,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:33,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540868082] [2021-11-03 05:45:33,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:45:33,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416830982] [2021-11-03 05:45:33,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~b~0] [2021-11-03 05:45:33,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [994837169] [2021-11-03 05:45:33,224 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 05:45:33,224 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:45:33,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:45:33,225 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:45:33,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:45:33,235 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,236 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:33,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 05:45:33,237 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:33,237 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-03 05:45:33,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 133 [2021-11-03 05:45:33,254 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_26|], 10=[|v_#valid_27|]} [2021-11-03 05:45:33,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:33,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-03 05:45:33,268 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,269 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 05:45:33,269 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,270 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 05:45:33,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:33,276 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:45:33,276 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,278 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:33,278 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,279 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:33,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:33,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:33,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:33,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:33,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:33,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-03 05:45:33,303 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,306 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:45:33,307 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,308 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:45:33,308 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:33,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,316 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,317 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-03 05:45:33,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:45:33,318 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:238, output treesize:103 [2021-11-03 05:45:33,322 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,324 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-11-03 05:45:33,327 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.3 percent of original size [2021-11-03 05:45:33,329 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-03 05:45:33,334 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,338 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-11-03 05:45:33,341 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,343 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-03 05:45:33,346 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-11-03 05:45:33,349 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-11-03 05:45:33,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,422 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,430 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 294 [2021-11-03 05:45:33,435 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,442 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 299 [2021-11-03 05:45:33,448 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,455 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 299 [2021-11-03 05:45:33,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,514 INFO L180 QuantifierPusher]: treesize reduction 36, result has 58.1 percent of original size [2021-11-03 05:45:33,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:45:33,518 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-03 05:45:33,521 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,522 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-03 05:45:33,528 INFO L180 QuantifierPusher]: treesize reduction 36, result has 58.1 percent of original size [2021-11-03 05:45:33,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:45:33,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,601 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 261 [2021-11-03 05:45:33,615 INFO L180 QuantifierPusher]: treesize reduction 37, result has 58.9 percent of original size [2021-11-03 05:45:33,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:45:33,621 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,622 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-11-03 05:45:33,628 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:45:35,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:45:35,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:35,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-03 05:45:35,097 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-03 05:45:35,098 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-03 05:45:35,102 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:45:35,104 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:45:35,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:35,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:35,314 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:35,316 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 05:45:35,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 05:45:35 BoogieIcfgContainer [2021-11-03 05:45:35,327 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 05:45:35,328 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 05:45:35,328 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 05:45:35,328 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 05:45:35,329 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:45:20" (3/4) ... [2021-11-03 05:45:35,331 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-03 05:45:35,332 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 05:45:35,332 INFO L168 Benchmark]: Toolchain (without parser) took 18058.15 ms. Allocated memory was 96.5 MB in the beginning and 127.9 MB in the end (delta: 31.5 MB). Free memory was 61.6 MB in the beginning and 53.4 MB in the end (delta: 8.2 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. [2021-11-03 05:45:35,333 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 96.5 MB. Free memory was 66.3 MB in the beginning and 66.3 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:45:35,333 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.82 ms. Allocated memory is still 96.5 MB. Free memory was 61.4 MB in the beginning and 71.1 MB in the end (delta: -9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:45:35,333 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.07 ms. Allocated memory is still 96.5 MB. Free memory was 71.1 MB in the beginning and 69.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:45:35,334 INFO L168 Benchmark]: Boogie Preprocessor took 21.32 ms. Allocated memory is still 96.5 MB. Free memory was 69.4 MB in the beginning and 68.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:45:35,334 INFO L168 Benchmark]: RCFGBuilder took 2552.23 ms. Allocated memory is still 96.5 MB. Free memory was 68.2 MB in the beginning and 54.1 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:45:35,334 INFO L168 Benchmark]: TraceAbstraction took 15187.23 ms. Allocated memory was 96.5 MB in the beginning and 127.9 MB in the end (delta: 31.5 MB). Free memory was 53.7 MB in the beginning and 53.4 MB in the end (delta: 322.6 kB). Peak memory consumption was 34.2 MB. Max. memory is 16.1 GB. [2021-11-03 05:45:35,335 INFO L168 Benchmark]: Witness Printer took 3.65 ms. Allocated memory is still 127.9 MB. Free memory is still 53.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:45:35,336 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 96.5 MB. Free memory was 66.3 MB in the beginning and 66.3 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 253.82 ms. Allocated memory is still 96.5 MB. Free memory was 61.4 MB in the beginning and 71.1 MB in the end (delta: -9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.07 ms. Allocated memory is still 96.5 MB. Free memory was 71.1 MB in the beginning and 69.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.32 ms. Allocated memory is still 96.5 MB. Free memory was 69.4 MB in the beginning and 68.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 2552.23 ms. Allocated memory is still 96.5 MB. Free memory was 68.2 MB in the beginning and 54.1 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15187.23 ms. Allocated memory was 96.5 MB in the beginning and 127.9 MB in the end (delta: 31.5 MB). Free memory was 53.7 MB in the beginning and 53.4 MB in the end (delta: 322.6 kB). Peak memory consumption was 34.2 MB. Max. memory is 16.1 GB. * Witness Printer took 3.65 ms. Allocated memory is still 127.9 MB. Free memory is still 53.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L25] int counter = 0; [L27] unsigned A, B; [L28] unsigned q, r, b; [L29] A = __VERIFIER_nondet_uint() [L30] B = __VERIFIER_nondet_uint() [L16] COND TRUE !cond [L16] COND FALSE !(!cond) [L33] q = 0 [L34] r = A [L35] b = B [L36] EXPR counter++ [L36] COND TRUE counter++<10 [L37] COND FALSE !(!(r >= b)) [L38] b = 2 * b [L36] EXPR counter++ [L36] COND TRUE counter++<10 [L37] COND FALSE !(!(r >= b)) [L38] b = 2 * b [L36] EXPR counter++ [L36] COND TRUE counter++<10 [L37] COND TRUE !(r >= b) [L40] EXPR counter++ [L40] COND TRUE counter++<10 [L19] COND TRUE !(cond) [L21] reach_error() - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 15.1s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 84 SDtfs, 105 SDslu, 180 SDs, 0 SdLazy, 147 SolverSat, 32 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 127 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=6, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 46 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 110 ConstructedInterpolants, 5 QuantifiedInterpolants, 737 SizeOfPredicates, 18 NumberOfNonLiveVariables, 345 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 6/43 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 864, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 9, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 17, TOOLS_POST_TIME[ms]: 438, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 17, TOOLS_QUANTIFIERELIM_TIME[ms]: 429, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 217, FLUID_QUERY_TIME[ms]: 4, FLUID_QUERIES: 31, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME[ms]: 190, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 159, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 13, DOMAIN_ISBOTTOM_APPLICATIONS: 9, DOMAIN_ISBOTTOM_TIME[ms]: 19, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 306, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 306, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 10, DAG_COMPRESSION_PROCESSED_NODES: 105, DAG_COMPRESSION_RETAINED_NODES: 28, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-03 05:45:35,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/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_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH --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 b879e9957df47aa9212d1bcb19c90b87b865d954f1a44f3c044747ce0553d2eb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:45:37,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:45:37,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:45:37,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:45:37,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:45:37,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:45:37,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:45:37,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:45:37,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:45:37,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:45:37,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:45:37,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:45:37,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:45:37,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:45:37,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:45:37,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:45:37,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:45:37,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:45:37,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:45:37,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:45:37,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:45:37,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:45:37,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:45:37,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:45:37,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:45:37,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:45:37,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:45:37,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:45:37,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:45:37,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:45:37,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:45:37,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:45:37,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:45:37,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:45:37,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:45:37,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:45:37,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:45:37,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:45:37,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:45:37,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:45:37,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:45:37,945 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 05:45:37,985 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:45:37,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:45:37,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:45:37,987 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:45:37,987 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:45:37,987 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:45:37,988 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:45:37,988 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:45:37,988 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:45:37,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:45:37,990 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:45:37,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:45:37,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:45:37,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:45:37,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:45:37,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:45:37,992 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:45:37,992 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:45:37,992 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:45:37,992 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:45:37,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:45:37,993 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:45:37,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:45:37,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:45:37,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:45:37,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:45:37,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:45:37,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:45:37,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:45:37,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:45:37,995 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:45:37,995 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:45:37,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:45:37,996 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:45:37,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:45:37,996 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_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b879e9957df47aa9212d1bcb19c90b87b865d954f1a44f3c044747ce0553d2eb [2021-11-03 05:45:38,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:45:38,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:45:38,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:45:38,445 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:45:38,445 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:45:38,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i [2021-11-03 05:45:38,515 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/data/6f08afa1b/815041edcbe945eb82e5160eecbc1752/FLAG7151ad9c4 [2021-11-03 05:45:39,042 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:45:39,045 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i [2021-11-03 05:45:39,052 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/data/6f08afa1b/815041edcbe945eb82e5160eecbc1752/FLAG7151ad9c4 [2021-11-03 05:45:39,401 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/data/6f08afa1b/815041edcbe945eb82e5160eecbc1752 [2021-11-03 05:45:39,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:45:39,405 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:45:39,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:45:39,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:45:39,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:45:39,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:45:39" (1/1) ... [2021-11-03 05:45:39,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b80c279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:39, skipping insertion in model container [2021-11-03 05:45:39,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:45:39" (1/1) ... [2021-11-03 05:45:39,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:45:39,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:45:39,583 WARN L228 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_da7da7c6-d522-4d54-a1c9-956196751cec/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i[950,963] [2021-11-03 05:45:39,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:45:39,610 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:45:39,639 WARN L228 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_da7da7c6-d522-4d54-a1c9-956196751cec/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i[950,963] [2021-11-03 05:45:39,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:45:39,681 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:45:39,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:39 WrapperNode [2021-11-03 05:45:39,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:45:39,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:45:39,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:45:39,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:45:39,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:39" (1/1) ... [2021-11-03 05:45:39,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:39" (1/1) ... [2021-11-03 05:45:39,726 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:45:39,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:45:39,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:45:39,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:45:39,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:39" (1/1) ... [2021-11-03 05:45:39,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:39" (1/1) ... [2021-11-03 05:45:39,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:39" (1/1) ... [2021-11-03 05:45:39,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:39" (1/1) ... [2021-11-03 05:45:39,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:39" (1/1) ... [2021-11-03 05:45:39,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:39" (1/1) ... [2021-11-03 05:45:39,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:39" (1/1) ... [2021-11-03 05:45:39,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:45:39,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:45:39,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:45:39,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:45:39,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:39" (1/1) ... [2021-11-03 05:45:39,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:45:39,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:45:39,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:45:39,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:45:39,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:45:39,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:45:39,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:45:39,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:45:40,237 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:45:40,237 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-03 05:45:40,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:45:40 BoogieIcfgContainer [2021-11-03 05:45:40,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:45:40,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:45:40,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:45:40,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:45:40,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:45:39" (1/3) ... [2021-11-03 05:45:40,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6ae215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:45:40, skipping insertion in model container [2021-11-03 05:45:40,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:45:39" (2/3) ... [2021-11-03 05:45:40,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6ae215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:45:40, skipping insertion in model container [2021-11-03 05:45:40,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:45:40" (3/3) ... [2021-11-03 05:45:40,271 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound10.i [2021-11-03 05:45:40,276 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:45:40,276 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-03 05:45:40,344 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:45:40,353 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 [2021-11-03 05:45:40,353 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-03 05:45:40,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:40,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 05:45:40,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:40,400 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:40,400 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:45:40,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:40,406 INFO L85 PathProgramCache]: Analyzing trace with hash 344827834, now seen corresponding path program 1 times [2021-11-03 05:45:40,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:45:40,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501443473] [2021-11-03 05:45:40,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:40,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:45:40,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:45:40,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:45:40,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:45:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:40,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 05:45:40,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:40,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:40,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:45:40,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501443473] [2021-11-03 05:45:40,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501443473] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:40,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:40,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:45:40,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398037980] [2021-11-03 05:45:40,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:45:40,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:45:40,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:45:40,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:45:40,706 INFO L87 Difference]: Start difference. First operand has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:40,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:40,723 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-11-03 05:45:40,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:45:40,725 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-11-03 05:45:40,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:40,735 INFO L225 Difference]: With dead ends: 45 [2021-11-03 05:45:40,735 INFO L226 Difference]: Without dead ends: 20 [2021-11-03 05:45:40,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:45:40,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-03 05:45:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-03 05:45:40,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:40,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-03 05:45:40,772 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2021-11-03 05:45:40,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:40,773 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-03 05:45:40,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:40,773 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-03 05:45:40,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 05:45:40,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:40,774 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:40,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:40,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:45:40,987 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:45:40,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:40,988 INFO L85 PathProgramCache]: Analyzing trace with hash 514095505, now seen corresponding path program 1 times [2021-11-03 05:45:40,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:45:40,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190246530] [2021-11-03 05:45:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:40,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:45:40,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:45:40,991 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:45:41,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:45:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:41,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:45:41,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:41,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:41,248 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:45:41,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190246530] [2021-11-03 05:45:41,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190246530] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:41,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:41,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:45:41,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238382521] [2021-11-03 05:45:41,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:45:41,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:45:41,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:45:41,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:45:41,252 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:41,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:41,307 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-11-03 05:45:41,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:45:41,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 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 12 [2021-11-03 05:45:41,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:41,311 INFO L225 Difference]: With dead ends: 37 [2021-11-03 05:45:41,311 INFO L226 Difference]: Without dead ends: 26 [2021-11-03 05:45:41,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:45:41,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-03 05:45:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-03 05:45:41,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-11-03 05:45:41,324 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 12 [2021-11-03 05:45:41,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:41,327 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-11-03 05:45:41,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:41,328 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-11-03 05:45:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 05:45:41,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:41,330 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:41,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:41,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:45:41,542 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:45:41,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:41,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1194113768, now seen corresponding path program 1 times [2021-11-03 05:45:41,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:45:41,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425033912] [2021-11-03 05:45:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:41,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:45:41,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:45:41,558 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:45:41,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:45:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:41,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:45:41,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:41,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:42,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:45:42,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425033912] [2021-11-03 05:45:42,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425033912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:42,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:42,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-11-03 05:45:42,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054597599] [2021-11-03 05:45:42,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:45:42,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:45:42,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:45:42,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:45:42,768 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:44,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:44,078 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-11-03 05:45:44,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:45:44,096 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 05:45:44,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:44,097 INFO L225 Difference]: With dead ends: 56 [2021-11-03 05:45:44,098 INFO L226 Difference]: Without dead ends: 46 [2021-11-03 05:45:44,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-11-03 05:45:44,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-03 05:45:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2021-11-03 05:45:44,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:44,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-11-03 05:45:44,106 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 13 [2021-11-03 05:45:44,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:44,106 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-11-03 05:45:44,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:44,107 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-11-03 05:45:44,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 05:45:44,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:44,108 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:44,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:44,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:45:44,327 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:45:44,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:44,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1639218671, now seen corresponding path program 1 times [2021-11-03 05:45:44,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:45:44,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233405454] [2021-11-03 05:45:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:44,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:45:44,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:45:44,331 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:45:44,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:45:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:44,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:45:44,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:44,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:44,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:45:44,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233405454] [2021-11-03 05:45:44,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233405454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:45:44,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1993261187] [2021-11-03 05:45:44,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:44,642 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:45:44,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:45:44,650 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:45:44,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-03 05:45:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:44,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:45:44,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:44,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:44,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1993261187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:45:44,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887336944] [2021-11-03 05:45:44,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:44,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:44,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:45:44,974 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:45:44,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 05:45:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:45,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:45:45,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:45,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:45,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887336944] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:45:45,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:45:45,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-11-03 05:45:45,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683253535] [2021-11-03 05:45:45,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:45:45,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:45:45,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:45:45,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:45:45,225 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:45,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:45,459 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2021-11-03 05:45:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 05:45:45,459 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-03 05:45:45,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:45,461 INFO L225 Difference]: With dead ends: 115 [2021-11-03 05:45:45,461 INFO L226 Difference]: Without dead ends: 104 [2021-11-03 05:45:45,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-11-03 05:45:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-03 05:45:45,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 46. [2021-11-03 05:45:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-03 05:45:45,471 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 18 [2021-11-03 05:45:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:45,471 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-03 05:45:45,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-03 05:45:45,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-03 05:45:45,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:45,473 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:45,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-03 05:45:45,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:45,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-03 05:45:46,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:45:46,095 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:45:46,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:46,095 INFO L85 PathProgramCache]: Analyzing trace with hash 772623512, now seen corresponding path program 1 times [2021-11-03 05:45:46,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:45:46,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275787011] [2021-11-03 05:45:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:46,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:45:46,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:45:46,098 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:45:46,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:45:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:46,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:45:46,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 05:45:46,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 05:45:46,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:45:46,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275787011] [2021-11-03 05:45:46,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275787011] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:46,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:46,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:45:46,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191800593] [2021-11-03 05:45:46,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:45:46,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:45:46,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:45:46,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:45:46,599 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:46,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:46,755 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2021-11-03 05:45:46,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:45:46,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-03 05:45:46,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:46,756 INFO L225 Difference]: With dead ends: 69 [2021-11-03 05:45:46,756 INFO L226 Difference]: Without dead ends: 62 [2021-11-03 05:45:46,757 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:45:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-03 05:45:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2021-11-03 05:45:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:46,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-11-03 05:45:46,764 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 19 [2021-11-03 05:45:46,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:46,765 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-11-03 05:45:46,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-11-03 05:45:46,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-03 05:45:46,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:46,766 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:46,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:46,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:45:46,994 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:45:46,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:46,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1690106195, now seen corresponding path program 1 times [2021-11-03 05:45:46,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:45:46,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562713908] [2021-11-03 05:45:46,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:46,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:45:46,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:45:46,996 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:45:46,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:45:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:47,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:45:47,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:48,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:51,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:45:51,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562713908] [2021-11-03 05:45:51,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562713908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:45:51,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1628193773] [2021-11-03 05:45:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:51,027 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:45:51,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:45:51,030 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:45:51,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-03 05:45:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:51,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 05:45:51,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:53,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:55,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1628193773] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:45:55,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809347964] [2021-11-03 05:45:55,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:55,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:55,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:45:55,101 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:45:55,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-03 05:45:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:55,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 05:45:55,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:57,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:46:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:00,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809347964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:46:00,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:46:00,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7, 6, 13, 9] total 30 [2021-11-03 05:46:00,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112647567] [2021-11-03 05:46:00,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-03 05:46:00,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:46:00,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-03 05:46:00,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=661, Unknown=1, NotChecked=0, Total=870 [2021-11-03 05:46:00,609 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 30 states, 30 states have (on average 2.9) internal successors, (87), 30 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:46:13,811 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2021-11-03 05:46:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 05:46:13,814 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.9) internal successors, (87), 30 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-03 05:46:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:46:13,815 INFO L225 Difference]: With dead ends: 112 [2021-11-03 05:46:13,815 INFO L226 Difference]: Without dead ends: 92 [2021-11-03 05:46:13,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=635, Invalid=1914, Unknown=1, NotChecked=0, Total=2550 [2021-11-03 05:46:13,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-03 05:46:13,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 51. [2021-11-03 05:46:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-11-03 05:46:13,825 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 21 [2021-11-03 05:46:13,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:46:13,826 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-11-03 05:46:13,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.9) internal successors, (87), 30 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:13,826 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-11-03 05:46:13,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-03 05:46:13,827 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:46:13,827 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:46:13,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:46:14,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:46:14,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-03 05:46:14,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:46:14,439 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:46:14,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:46:14,440 INFO L85 PathProgramCache]: Analyzing trace with hash 953704056, now seen corresponding path program 1 times [2021-11-03 05:46:14,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:46:14,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231843014] [2021-11-03 05:46:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:46:14,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:46:14,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:46:14,446 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:46:14,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:46:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:46:14,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:46:14,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:46:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:46:14,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:46:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:46:14,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:46:14,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231843014] [2021-11-03 05:46:14,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231843014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:46:14,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:46:14,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:46:14,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403201725] [2021-11-03 05:46:14,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:46:14,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:46:14,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:46:14,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:46:14,788 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:14,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:46:14,855 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2021-11-03 05:46:14,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:46:14,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-03 05:46:14,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:46:14,858 INFO L225 Difference]: With dead ends: 79 [2021-11-03 05:46:14,858 INFO L226 Difference]: Without dead ends: 55 [2021-11-03 05:46:14,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:46:14,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-03 05:46:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-11-03 05:46:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2021-11-03 05:46:14,866 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 23 [2021-11-03 05:46:14,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:46:14,869 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2021-11-03 05:46:14,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:14,869 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2021-11-03 05:46:14,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-03 05:46:14,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:46:14,876 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:46:14,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:46:15,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:46:15,089 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:46:15,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:46:15,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1038743540, now seen corresponding path program 2 times [2021-11-03 05:46:15,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:46:15,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007810396] [2021-11-03 05:46:15,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:46:15,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:46:15,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:46:15,091 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:46:15,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:46:15,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:46:15,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:46:15,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:46:15,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:46:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:15,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:46:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:15,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:46:15,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007810396] [2021-11-03 05:46:15,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007810396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:46:15,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [330325738] [2021-11-03 05:46:15,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:46:15,946 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:46:15,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:46:15,947 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:46:15,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-03 05:46:16,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:46:16,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:46:16,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:46:16,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:46:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:16,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:46:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:16,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [330325738] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:46:16,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987325983] [2021-11-03 05:46:16,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:46:16,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:46:16,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:46:16,545 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:46:16,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-03 05:46:16,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:46:16,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:46:16,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:46:16,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:46:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:17,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:46:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:17,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987325983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:46:17,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:46:17,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 8, 6] total 16 [2021-11-03 05:46:17,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381854440] [2021-11-03 05:46:17,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-03 05:46:17,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:46:17,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-03 05:46:17,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:46:17,339 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:17,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:46:17,623 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-11-03 05:46:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:46:17,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-03 05:46:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:46:17,626 INFO L225 Difference]: With dead ends: 70 [2021-11-03 05:46:17,626 INFO L226 Difference]: Without dead ends: 50 [2021-11-03 05:46:17,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-03 05:46:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-03 05:46:17,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-11-03 05:46:17,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:17,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-11-03 05:46:17,633 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 26 [2021-11-03 05:46:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:46:17,633 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-11-03 05:46:17,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-11-03 05:46:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-03 05:46:17,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:46:17,634 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:46:17,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:46:17,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:46:18,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:46:18,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:46:18,251 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:46:18,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:46:18,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1597045256, now seen corresponding path program 3 times [2021-11-03 05:46:18,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:46:18,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545381694] [2021-11-03 05:46:18,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:46:18,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:46:18,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:46:18,254 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:46:18,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:46:19,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-03 05:46:19,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:46:19,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-03 05:46:19,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:46:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:22,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:46:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:34,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:46:34,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545381694] [2021-11-03 05:46:34,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545381694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:46:34,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1165820334] [2021-11-03 05:46:34,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:46:34,332 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:46:34,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:46:34,334 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:46:34,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 05:46:35,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-03 05:46:35,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:46:35,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 05:46:35,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:46:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:36,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:46:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:39,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1165820334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:46:39,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209074249] [2021-11-03 05:46:39,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:46:39,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:46:39,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:46:39,837 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:46:39,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 05:47:05,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-03 05:47:05,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:47:05,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 05:47:05,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:24,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:48:01,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209074249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:48:01,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:48:01,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 14, 14] total 36 [2021-11-03 05:48:01,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626756284] [2021-11-03 05:48:01,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-03 05:48:01,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:01,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-03 05:48:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=952, Unknown=21, NotChecked=0, Total=1260 [2021-11-03 05:48:01,077 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:28,805 WARN L207 SmtUtils]: Spent 16.12 s on a formula simplification that was a NOOP. DAG size: 51 [2021-11-03 05:49:02,260 WARN L207 SmtUtils]: Spent 33.16 s on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-11-03 05:49:28,764 WARN L207 SmtUtils]: Spent 16.10 s on a formula simplification that was a NOOP. DAG size: 49 [2021-11-03 05:50:03,914 WARN L207 SmtUtils]: Spent 33.01 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-11-03 05:50:30,843 WARN L207 SmtUtils]: Spent 24.41 s on a formula simplification that was a NOOP. DAG size: 49 [2021-11-03 05:51:09,198 WARN L207 SmtUtils]: Spent 33.50 s on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2021-11-03 05:51:24,648 WARN L207 SmtUtils]: Spent 5.09 s on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2021-11-03 05:52:08,997 WARN L207 SmtUtils]: Spent 33.46 s on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-11-03 05:52:50,163 WARN L207 SmtUtils]: Spent 33.38 s on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2021-11-03 05:53:27,873 WARN L207 SmtUtils]: Spent 34.08 s on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2021-11-03 05:53:54,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:53:54,027 INFO L93 Difference]: Finished difference Result 129 states and 158 transitions. [2021-11-03 05:53:54,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-03 05:53:54,032 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-03 05:53:54,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:53:54,034 INFO L225 Difference]: With dead ends: 129 [2021-11-03 05:53:54,034 INFO L226 Difference]: Without dead ends: 105 [2021-11-03 05:53:54,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 368.2s TimeCoverageRelationStatistics Valid=844, Invalid=3287, Unknown=29, NotChecked=0, Total=4160 [2021-11-03 05:53:54,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-03 05:53:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2021-11-03 05:53:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 73 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:53:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2021-11-03 05:53:54,070 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 29 [2021-11-03 05:53:54,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:53:54,071 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2021-11-03 05:53:54,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:53:54,071 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2021-11-03 05:53:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-03 05:53:54,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:53:54,073 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:53:54,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:53:54,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:53:54,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 05:53:54,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:53:54,695 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:53:54,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:53:54,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2031166962, now seen corresponding path program 1 times [2021-11-03 05:53:54,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:53:54,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038390574] [2021-11-03 05:53:54,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:53:54,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:53:54,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:53:54,698 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:53:54,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 05:53:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:53:55,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 05:53:55,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:53:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:53:55,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:53:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:53:55,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:53:55,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038390574] [2021-11-03 05:53:55,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038390574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:53:55,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1883411553] [2021-11-03 05:53:55,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:53:55,613 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:53:55,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:53:55,613 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:53:55,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-03 05:53:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:53:56,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 05:53:56,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:53:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:53:56,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:53:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:53:56,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1883411553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:53:56,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021137058] [2021-11-03 05:53:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:53:56,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:53:56,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:53:56,467 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:53:56,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-03 05:53:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:53:56,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 05:53:56,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:53:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:53:57,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:53:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:53:57,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021137058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:53:57,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:53:57,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 22 [2021-11-03 05:53:57,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970455747] [2021-11-03 05:53:57,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-03 05:53:57,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:53:57,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-03 05:53:57,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-11-03 05:53:57,602 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:53:58,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:53:58,587 INFO L93 Difference]: Finished difference Result 344 states and 403 transitions. [2021-11-03 05:53:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-03 05:53:58,588 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-03 05:53:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:53:58,591 INFO L225 Difference]: With dead ends: 344 [2021-11-03 05:53:58,591 INFO L226 Difference]: Without dead ends: 340 [2021-11-03 05:53:58,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2021-11-03 05:53:58,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-03 05:53:58,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 272. [2021-11-03 05:53:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 270 states have (on average 1.211111111111111) internal successors, (327), 271 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:53:58,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 327 transitions. [2021-11-03 05:53:58,637 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 327 transitions. Word has length 30 [2021-11-03 05:53:58,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:53:58,638 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 327 transitions. [2021-11-03 05:53:58,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:53:58,638 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 327 transitions. [2021-11-03 05:53:58,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-03 05:53:58,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:53:58,639 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:53:58,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-03 05:53:58,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:53:59,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:53:59,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:53:59,253 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:53:59,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:53:59,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2077407147, now seen corresponding path program 1 times [2021-11-03 05:53:59,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:53:59,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572641332] [2021-11-03 05:53:59,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:53:59,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:53:59,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:53:59,254 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:53:59,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:53:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:53:59,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:53:59,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:54:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 05:54:00,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:54:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 05:54:00,791 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:54:00,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572641332] [2021-11-03 05:54:00,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572641332] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:54:00,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:54:00,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-03 05:54:00,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233254872] [2021-11-03 05:54:00,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:54:00,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:54:00,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:54:00,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:54:00,793 INFO L87 Difference]: Start difference. First operand 272 states and 327 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:54:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:54:01,729 INFO L93 Difference]: Finished difference Result 276 states and 330 transitions. [2021-11-03 05:54:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:54:01,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-03 05:54:01,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:54:01,733 INFO L225 Difference]: With dead ends: 276 [2021-11-03 05:54:01,733 INFO L226 Difference]: Without dead ends: 272 [2021-11-03 05:54:01,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:54:01,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-03 05:54:01,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 246. [2021-11-03 05:54:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 244 states have (on average 1.2049180327868851) internal successors, (294), 245 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:54:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 294 transitions. [2021-11-03 05:54:01,770 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 294 transitions. Word has length 32 [2021-11-03 05:54:01,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:54:01,771 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 294 transitions. [2021-11-03 05:54:01,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:54:01,771 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 294 transitions. [2021-11-03 05:54:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 05:54:01,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:54:01,772 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:54:01,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:54:01,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:54:01,983 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:54:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:54:01,983 INFO L85 PathProgramCache]: Analyzing trace with hash -721741177, now seen corresponding path program 4 times [2021-11-03 05:54:01,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:54:01,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375172354] [2021-11-03 05:54:01,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 05:54:01,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:54:01,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:54:01,985 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:54:01,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 05:54:02,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 05:54:02,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:54:02,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 05:54:02,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:54:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:54:03,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:54:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:54:03,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:54:03,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375172354] [2021-11-03 05:54:03,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375172354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:54:03,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1460999480] [2021-11-03 05:54:03,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 05:54:03,762 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:54:03,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:54:03,763 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:54:03,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-03 05:54:04,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 05:54:04,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:54:04,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:54:04,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:54:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:54:05,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:54:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:54:06,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1460999480] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:54:06,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138767354] [2021-11-03 05:54:06,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 05:54:06,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:54:06,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:54:06,624 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:54:06,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-03 05:54:07,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 05:54:07,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:54:07,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 05:54:07,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:54:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:54:07,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:54:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:54:07,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138767354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:54:07,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:54:07,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12, 10, 10, 10] total 25 [2021-11-03 05:54:07,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361231446] [2021-11-03 05:54:07,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-03 05:54:07,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:54:07,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-03 05:54:07,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-11-03 05:54:07,916 INFO L87 Difference]: Start difference. First operand 246 states and 294 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:54:10,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:54:10,299 INFO L93 Difference]: Finished difference Result 328 states and 392 transitions. [2021-11-03 05:54:10,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 05:54:10,303 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-03 05:54:10,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:54:10,304 INFO L225 Difference]: With dead ends: 328 [2021-11-03 05:54:10,305 INFO L226 Difference]: Without dead ends: 275 [2021-11-03 05:54:10,306 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2021-11-03 05:54:10,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-03 05:54:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 228. [2021-11-03 05:54:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 226 states have (on average 1.2035398230088497) internal successors, (272), 227 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:54:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 272 transitions. [2021-11-03 05:54:10,340 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 272 transitions. Word has length 34 [2021-11-03 05:54:10,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:54:10,341 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 272 transitions. [2021-11-03 05:54:10,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:54:10,341 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 272 transitions. [2021-11-03 05:54:10,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-03 05:54:10,342 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:54:10,342 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:54:10,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-03 05:54:10,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 05:54:10,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-03 05:54:10,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:54:10,950 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:54:10,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:54:10,951 INFO L85 PathProgramCache]: Analyzing trace with hash -864195469, now seen corresponding path program 5 times [2021-11-03 05:54:10,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:54:10,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462710537] [2021-11-03 05:54:10,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 05:54:10,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:54:10,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:54:10,952 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:54:10,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 05:54:19,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-03 05:54:19,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:54:19,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-03 05:54:19,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:54:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 24 refuted. 9 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:54:40,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:55:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:38,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:55:38,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462710537] [2021-11-03 05:55:38,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462710537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:55:38,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [12066110] [2021-11-03 05:55:38,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 05:55:38,652 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:55:38,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:55:38,653 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:55:38,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-03 05:55:44,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-03 05:55:44,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:55:44,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-03 05:55:44,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:56:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 33 refuted. 9 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:56:55,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:57:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:57:09,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [12066110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:57:09,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452588897] [2021-11-03 05:57:09,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 05:57:09,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:57:09,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:57:09,644 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:57:09,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7da7c6-d522-4d54-a1c9-956196751cec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-03 05:58:07,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-03 05:58:07,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:58:07,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-03 05:58:07,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:59:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:59:23,825 INFO L328 TraceCheckSpWp]: Computing backward predicates...