./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/vnew1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/vnew1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:41:32,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:41:32,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:41:32,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:41:32,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:41:32,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:41:32,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:41:32,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:41:32,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:41:32,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:41:32,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:41:32,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:41:32,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:41:32,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:41:32,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:41:32,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:41:32,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:41:32,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:41:32,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:41:32,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:41:32,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:41:32,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:41:32,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:41:32,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:41:32,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:41:32,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:41:32,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:41:32,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:41:32,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:41:32,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:41:32,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:41:32,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:41:32,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:41:32,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:41:32,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:41:32,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:41:32,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:41:32,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:41:32,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:41:32,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:41:32,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:41:32,856 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:41:32,897 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:41:32,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:41:32,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:41:32,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:41:32,900 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:41:32,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:41:32,901 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:41:32,901 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:41:32,901 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:41:32,902 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:41:32,903 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:41:32,903 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:41:32,903 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:41:32,904 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:41:32,904 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:41:32,904 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:41:32,904 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:41:32,905 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:41:32,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:41:32,907 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:41:32,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:41:32,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:41:32,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:41:32,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:41:32,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:41:32,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:41:32,910 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:41:32,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:41:32,910 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:41:32,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:41:32,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:41:32,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:41:32,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:41:32,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:41:32,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:41:32,912 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:41:32,913 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:41:32,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:41:32,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:41:32,913 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:41:32,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:41:32,914 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_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 [2021-11-23 17:41:33,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:41:33,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:41:33,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:41:33,243 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:41:33,244 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:41:33,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loops-crafted-1/vnew1.c [2021-11-23 17:41:33,317 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/data/a9d64801d/2c6687cd49cd4255a9682ab03e2858dc/FLAG81642ae1b [2021-11-23 17:41:33,830 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:41:33,831 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/sv-benchmarks/c/loops-crafted-1/vnew1.c [2021-11-23 17:41:33,840 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/data/a9d64801d/2c6687cd49cd4255a9682ab03e2858dc/FLAG81642ae1b [2021-11-23 17:41:34,191 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/data/a9d64801d/2c6687cd49cd4255a9682ab03e2858dc [2021-11-23 17:41:34,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:41:34,195 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:41:34,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:41:34,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:41:34,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:41:34,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:41:34" (1/1) ... [2021-11-23 17:41:34,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e6ea29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:34, skipping insertion in model container [2021-11-23 17:41:34,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:41:34" (1/1) ... [2021-11-23 17:41:34,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:41:34,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:41:34,419 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2021-11-23 17:41:34,432 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:41:34,441 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:41:34,451 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2021-11-23 17:41:34,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:41:34,466 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:41:34,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:34 WrapperNode [2021-11-23 17:41:34,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:41:34,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:41:34,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:41:34,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:41:34,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:34" (1/1) ... [2021-11-23 17:41:34,481 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:34" (1/1) ... [2021-11-23 17:41:34,497 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2021-11-23 17:41:34,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:41:34,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:41:34,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:41:34,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:41:34,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:34" (1/1) ... [2021-11-23 17:41:34,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:34" (1/1) ... [2021-11-23 17:41:34,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:34" (1/1) ... [2021-11-23 17:41:34,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:34" (1/1) ... [2021-11-23 17:41:34,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:34" (1/1) ... [2021-11-23 17:41:34,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:34" (1/1) ... [2021-11-23 17:41:34,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:34" (1/1) ... [2021-11-23 17:41:34,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:41:34,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:41:34,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:41:34,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:41:34,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:34" (1/1) ... [2021-11-23 17:41:34,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:41:34,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:41:34,577 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:41:34,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:41:34,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:41:34,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:41:34,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:41:34,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:41:34,710 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:41:34,712 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:41:34,903 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:41:34,916 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:41:34,921 INFO L158 Benchmark]: Toolchain (without parser) took 725.29ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 73.4MB in the beginning and 86.0MB in the end (delta: -12.6MB). Peak memory consumption was 6.7MB. Max. memory is 16.1GB. [2021-11-23 17:41:34,922 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 102.8MB. Free memory is still 58.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:41:34,923 INFO L158 Benchmark]: CACSL2BoogieTranslator took 270.96ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 73.2MB in the beginning and 97.8MB in the end (delta: -24.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:41:34,924 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.27ms. Allocated memory is still 123.7MB. Free memory was 97.8MB in the beginning and 96.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:41:34,925 INFO L158 Benchmark]: Boogie Preprocessor took 21.12ms. Allocated memory is still 123.7MB. Free memory was 96.2MB in the beginning and 95.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:41:34,926 INFO L158 Benchmark]: RCFGBuilder took 398.34ms. Allocated memory is still 123.7MB. Free memory was 95.2MB in the beginning and 86.0MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:41:34,931 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 102.8MB. Free memory is still 58.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 270.96ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 73.2MB in the beginning and 97.8MB in the end (delta: -24.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.27ms. Allocated memory is still 123.7MB. Free memory was 97.8MB in the beginning and 96.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.12ms. Allocated memory is still 123.7MB. Free memory was 96.2MB in the beginning and 95.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 398.34ms. Allocated memory is still 123.7MB. Free memory was 95.2MB in the beginning and 86.0MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:41:34,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/vnew1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:41:37,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:41:37,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:41:37,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:41:37,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:41:37,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:41:37,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:41:37,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:41:37,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:41:37,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:41:37,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:41:37,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:41:37,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:41:37,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:41:37,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:41:37,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:41:37,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:41:37,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:41:37,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:41:37,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:41:37,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:41:37,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:41:37,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:41:37,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:41:37,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:41:37,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:41:37,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:41:37,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:41:37,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:41:37,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:41:37,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:41:37,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:41:37,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:41:37,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:41:37,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:41:37,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:41:37,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:41:37,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:41:37,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:41:37,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:41:37,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:41:37,566 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:41:37,610 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:41:37,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:41:37,611 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:41:37,611 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:41:37,612 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:41:37,612 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:41:37,613 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:41:37,613 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:41:37,613 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:41:37,613 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:41:37,614 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:41:37,615 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:41:37,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:41:37,616 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:41:37,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:41:37,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:41:37,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:41:37,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:41:37,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:41:37,618 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:41:37,618 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:41:37,618 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:41:37,618 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:41:37,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:41:37,619 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:41:37,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:41:37,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:41:37,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:41:37,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:41:37,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:41:37,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:41:37,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:41:37,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:41:37,621 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:41:37,621 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:37,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:41:37,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:41:37,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:41:37,622 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_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 [2021-11-23 17:41:38,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:41:38,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:41:38,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:41:38,056 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:41:38,057 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:41:38,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loops-crafted-1/vnew1.c [2021-11-23 17:41:38,142 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/data/fc071de2e/df415740d63f43ffa9c07a5c957e1c70/FLAGea871e8df [2021-11-23 17:41:38,665 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:41:38,665 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/sv-benchmarks/c/loops-crafted-1/vnew1.c [2021-11-23 17:41:38,672 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/data/fc071de2e/df415740d63f43ffa9c07a5c957e1c70/FLAGea871e8df [2021-11-23 17:41:39,015 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/data/fc071de2e/df415740d63f43ffa9c07a5c957e1c70 [2021-11-23 17:41:39,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:41:39,019 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:41:39,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:41:39,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:41:39,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:41:39,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:41:39" (1/1) ... [2021-11-23 17:41:39,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45ac20df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:39, skipping insertion in model container [2021-11-23 17:41:39,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:41:39" (1/1) ... [2021-11-23 17:41:39,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:41:39,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:41:39,223 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2021-11-23 17:41:39,236 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:41:39,248 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:41:39,262 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2021-11-23 17:41:39,267 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:41:39,289 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:41:39,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:39 WrapperNode [2021-11-23 17:41:39,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:41:39,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:41:39,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:41:39,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:41:39,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:39" (1/1) ... [2021-11-23 17:41:39,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:39" (1/1) ... [2021-11-23 17:41:39,333 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2021-11-23 17:41:39,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:41:39,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:41:39,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:41:39,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:41:39,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:39" (1/1) ... [2021-11-23 17:41:39,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:39" (1/1) ... [2021-11-23 17:41:39,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:39" (1/1) ... [2021-11-23 17:41:39,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:39" (1/1) ... [2021-11-23 17:41:39,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:39" (1/1) ... [2021-11-23 17:41:39,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:39" (1/1) ... [2021-11-23 17:41:39,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:39" (1/1) ... [2021-11-23 17:41:39,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:41:39,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:41:39,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:41:39,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:41:39,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:39" (1/1) ... [2021-11-23 17:41:39,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:41:39,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:41:39,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:41:39,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:41:39,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:41:39,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:41:39,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:41:39,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:41:39,539 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:41:39,540 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:41:39,789 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:41:39,795 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:41:39,795 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 17:41:39,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:41:39 BoogieIcfgContainer [2021-11-23 17:41:39,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:41:39,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:41:39,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:41:39,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:41:39,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:41:39" (1/3) ... [2021-11-23 17:41:39,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a33a3e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:41:39, skipping insertion in model container [2021-11-23 17:41:39,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:39" (2/3) ... [2021-11-23 17:41:39,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a33a3e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:41:39, skipping insertion in model container [2021-11-23 17:41:39,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:41:39" (3/3) ... [2021-11-23 17:41:39,806 INFO L111 eAbstractionObserver]: Analyzing ICFG vnew1.c [2021-11-23 17:41:39,812 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:41:39,812 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:41:39,864 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:41:39,872 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:41:39,873 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:41:39,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 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) [2021-11-23 17:41:39,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 17:41:39,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:39,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:39,895 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:39,901 INFO L85 PathProgramCache]: Analyzing trace with hash 185205049, now seen corresponding path program 1 times [2021-11-23 17:41:39,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:39,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045541234] [2021-11-23 17:41:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:39,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:39,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:39,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:39,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:41:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:40,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:41:40,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:40,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:41:40,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:40,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045541234] [2021-11-23 17:41:40,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045541234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:41:40,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:41:40,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:41:40,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534144049] [2021-11-23 17:41:40,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:41:40,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:41:40,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:40,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:41:40,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:41:40,281 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:40,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:40,300 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2021-11-23 17:41:40,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:41:40,303 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 [2021-11-23 17:41:40,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:40,319 INFO L225 Difference]: With dead ends: 24 [2021-11-23 17:41:40,320 INFO L226 Difference]: Without dead ends: 10 [2021-11-23 17:41:40,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:41:40,328 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:40,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:41:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-23 17:41:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-23 17:41:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2021-11-23 17:41:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-23 17:41:40,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2021-11-23 17:41:40,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:40,376 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-23 17:41:40,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:40,376 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-23 17:41:40,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 17:41:40,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:40,378 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:40,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:40,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:41:40,607 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:40,611 INFO L85 PathProgramCache]: Analyzing trace with hash 181510965, now seen corresponding path program 1 times [2021-11-23 17:41:40,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:40,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608766850] [2021-11-23 17:41:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:40,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:40,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:40,615 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:40,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:41:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:40,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:41:40,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:40,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:41:40,858 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:40,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608766850] [2021-11-23 17:41:40,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608766850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:41:40,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:41:40,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:41:40,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397316281] [2021-11-23 17:41:40,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:41:40,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:41:40,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:40,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:41:40,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:41:40,863 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:41,002 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-23 17:41:41,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:41:41,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 [2021-11-23 17:41:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:41,008 INFO L225 Difference]: With dead ends: 18 [2021-11-23 17:41:41,008 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 17:41:41,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:41:41,011 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:41,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:41:41,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 17:41:41,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2021-11-23 17:41:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2021-11-23 17:41:41,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-23 17:41:41,018 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-11-23 17:41:41,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:41,018 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-23 17:41:41,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:41,019 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-23 17:41:41,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 17:41:41,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:41,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:41,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:41,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:41:41,221 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:41,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1383318765, now seen corresponding path program 1 times [2021-11-23 17:41:41,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:41,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659526182] [2021-11-23 17:41:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:41,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:41,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:41,224 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:41,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:41:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:41,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:41:41,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:41,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:42,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:42,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659526182] [2021-11-23 17:41:42,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659526182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:42,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1694765880] [2021-11-23 17:41:42,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:42,324 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:42,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:41:42,330 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:41:42,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 17:41:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:42,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:41:42,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:42,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:43,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1694765880] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:43,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336817338] [2021-11-23 17:41:43,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:43,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:41:43,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:41:43,957 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:41:43,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 17:41:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:44,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:41:44,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:44,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:44,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336817338] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:44,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:41:44,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 14 [2021-11-23 17:41:44,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276271490] [2021-11-23 17:41:44,519 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:41:44,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 17:41:44,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:44,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 17:41:44,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:41:44,521 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-11-23 17:41:46,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:46,713 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-11-23 17:41:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 17:41:46,718 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 9 [2021-11-23 17:41:46,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:46,718 INFO L225 Difference]: With dead ends: 38 [2021-11-23 17:41:46,719 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 17:41:46,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=188, Invalid=462, Unknown=0, NotChecked=0, Total=650 [2021-11-23 17:41:46,721 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:46,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 40 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 17:41:46,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 17:41:46,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2021-11-23 17:41:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) 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) [2021-11-23 17:41:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-11-23 17:41:46,730 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 9 [2021-11-23 17:41:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:46,731 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-11-23 17:41:46,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-11-23 17:41:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-11-23 17:41:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 17:41:46,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:46,732 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:46,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:46,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:47,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 17:41:47,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:41:47,338 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash -215461579, now seen corresponding path program 2 times [2021-11-23 17:41:47,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:47,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25510163] [2021-11-23 17:41:47,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:41:47,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:47,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:47,346 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:47,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:41:47,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:41:47,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:47,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:41:47,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:47,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:47,963 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:47,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25510163] [2021-11-23 17:41:47,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25510163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:47,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1795645487] [2021-11-23 17:41:47,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:41:47,964 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:47,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:41:47,966 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:41:47,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:41:48,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:41:48,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:48,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:41:48,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:48,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:48,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1795645487] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:48,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393596646] [2021-11-23 17:41:48,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:41:48,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:41:48,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:41:48,700 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:41:48,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 17:41:48,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:41:48,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:48,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:41:48,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:48,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:49,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393596646] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:49,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:41:49,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 28 [2021-11-23 17:41:49,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625255626] [2021-11-23 17:41:49,424 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:41:49,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 17:41:49,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:49,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 17:41:49,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2021-11-23 17:41:49,429 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:54,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:54,104 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2021-11-23 17:41:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-23 17:41:54,104 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 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 [2021-11-23 17:41:54,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:54,107 INFO L225 Difference]: With dead ends: 123 [2021-11-23 17:41:54,107 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 17:41:54,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1481, Invalid=4681, Unknown=0, NotChecked=0, Total=6162 [2021-11-23 17:41:54,112 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 423 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:54,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 156 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 17:41:54,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 17:41:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 40. [2021-11-23 17:41:54,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2021-11-23 17:41:54,128 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 12 [2021-11-23 17:41:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:54,129 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2021-11-23 17:41:54,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:54,129 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2021-11-23 17:41:54,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 17:41:54,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:54,130 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:54,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:54,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:54,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:54,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:41:54,739 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:54,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:54,739 INFO L85 PathProgramCache]: Analyzing trace with hash 655979117, now seen corresponding path program 1 times [2021-11-23 17:41:54,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:54,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638971647] [2021-11-23 17:41:54,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:54,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:54,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:54,742 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:54,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:41:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:54,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:41:54,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:55,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:57,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:57,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638971647] [2021-11-23 17:41:57,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638971647] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:57,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [991640202] [2021-11-23 17:41:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:57,892 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:57,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:41:57,892 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:41:57,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 17:41:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:58,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:41:58,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:41:58,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:42:02,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [991640202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:42:02,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449357840] [2021-11-23 17:42:02,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:42:02,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:42:02,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:42:02,248 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:42:02,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 17:42:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:42:02,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:42:02,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:42:02,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:42:02,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449357840] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:42:02,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:42:02,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7, 7, 7, 7] total 25 [2021-11-23 17:42:02,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914397208] [2021-11-23 17:42:02,782 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:42:02,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 17:42:02,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:42:02,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 17:42:02,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-11-23 17:42:02,784 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:14,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:42:14,555 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2021-11-23 17:42:14,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 17:42:14,560 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 17:42:14,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:42:14,561 INFO L225 Difference]: With dead ends: 89 [2021-11-23 17:42:14,561 INFO L226 Difference]: Without dead ends: 70 [2021-11-23 17:42:14,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=516, Invalid=2136, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 17:42:14,565 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:42:14,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 59 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 17:42:14,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-23 17:42:14,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 40. [2021-11-23 17:42:14,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:14,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-11-23 17:42:14,578 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 15 [2021-11-23 17:42:14,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:42:14,578 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-11-23 17:42:14,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:14,579 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-11-23 17:42:14,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 17:42:14,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:42:14,580 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:42:14,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:14,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:14,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:15,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:42:15,183 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:42:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:42:15,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1658678803, now seen corresponding path program 3 times [2021-11-23 17:42:15,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:42:15,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367488090] [2021-11-23 17:42:15,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:42:15,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:42:15,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:42:15,186 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:42:15,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:42:15,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 17:42:15,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:42:15,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 17:42:15,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:15,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:16,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:42:16,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367488090] [2021-11-23 17:42:16,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367488090] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:42:16,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [929135214] [2021-11-23 17:42:16,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:42:16,243 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:42:16,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:42:16,244 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:42:16,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:42:16,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 17:42:16,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:42:16,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:42:16,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:17,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:17,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [929135214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:42:17,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630792312] [2021-11-23 17:42:17,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:42:17,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:42:17,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:42:17,906 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:42:17,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 17:42:18,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 17:42:18,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:42:18,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 17:42:18,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:18,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:19,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630792312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:42:19,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:42:19,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15, 15] total 64 [2021-11-23 17:42:19,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716316315] [2021-11-23 17:42:19,754 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:42:19,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-23 17:42:19,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:42:19,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-23 17:42:19,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=694, Invalid=3338, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 17:42:19,758 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 64 states, 64 states have (on average 1.25) internal successors, (80), 64 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:42:47,960 INFO L93 Difference]: Finished difference Result 279 states and 336 transitions. [2021-11-23 17:42:47,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-23 17:42:47,963 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.25) internal successors, (80), 64 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 17:42:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:42:47,966 INFO L225 Difference]: With dead ends: 279 [2021-11-23 17:42:47,966 INFO L226 Difference]: Without dead ends: 277 [2021-11-23 17:42:47,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10507 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=6504, Invalid=25358, Unknown=0, NotChecked=0, Total=31862 [2021-11-23 17:42:47,976 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1030 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1030 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 657 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:42:47,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1030 Valid, 421 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [657 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2021-11-23 17:42:47,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-23 17:42:48,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 113. [2021-11-23 17:42:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.25) internal successors, (140), 112 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:48,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 140 transitions. [2021-11-23 17:42:48,022 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 140 transitions. Word has length 19 [2021-11-23 17:42:48,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:42:48,023 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 140 transitions. [2021-11-23 17:42:48,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.25) internal successors, (80), 64 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:48,023 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 140 transitions. [2021-11-23 17:42:48,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 17:42:48,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:42:48,025 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:42:48,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:48,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:48,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:48,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:42:48,629 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:42:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:42:48,630 INFO L85 PathProgramCache]: Analyzing trace with hash -752129739, now seen corresponding path program 2 times [2021-11-23 17:42:48,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:42:48,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281773221] [2021-11-23 17:42:48,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:42:48,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:42:48,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:42:48,632 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:42:48,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:42:48,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:42:48,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:42:48,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 17:42:48,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:51,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:59,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:42:59,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281773221] [2021-11-23 17:42:59,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281773221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:42:59,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [194381099] [2021-11-23 17:42:59,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:42:59,406 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:42:59,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:42:59,408 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:42:59,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:42:59,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:42:59,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:42:59,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:42:59,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 17:43:03,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 17:43:14,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [194381099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:14,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911727093] [2021-11-23 17:43:14,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:43:14,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:43:14,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:43:14,157 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:43:14,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 17:43:14,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:43:14,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:43:14,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:43:14,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:43:15,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:43:23,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911727093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:23,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:43:23,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10, 10, 10, 10] total 51 [2021-11-23 17:43:23,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195291229] [2021-11-23 17:43:23,418 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:43:23,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 17:43:23,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:23,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 17:43:23,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=2157, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 17:43:23,421 INFO L87 Difference]: Start difference. First operand 113 states and 140 transitions. Second operand has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 51 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:10,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:10,085 INFO L93 Difference]: Finished difference Result 175 states and 202 transitions. [2021-11-23 17:44:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-23 17:44:10,086 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 51 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 17:44:10,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:10,087 INFO L225 Difference]: With dead ends: 175 [2021-11-23 17:44:10,087 INFO L226 Difference]: Without dead ends: 125 [2021-11-23 17:44:10,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2705 ImplicationChecksByTransitivity, 72.9s TimeCoverageRelationStatistics Valid=1621, Invalid=8885, Unknown=0, NotChecked=0, Total=10506 [2021-11-23 17:44:10,092 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 165 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:10,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 126 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-23 17:44:10,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-23 17:44:10,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 77. [2021-11-23 17:44:10,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.2894736842105263) internal successors, (98), 76 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2021-11-23 17:44:10,118 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 22 [2021-11-23 17:44:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:10,118 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2021-11-23 17:44:10,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 51 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:10,119 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2021-11-23 17:44:10,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:44:10,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:10,120 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:10,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:10,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-23 17:44:10,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:10,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:44:10,732 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:10,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1749645237, now seen corresponding path program 3 times [2021-11-23 17:44:10,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:10,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521964848] [2021-11-23 17:44:10,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:44:10,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:10,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:10,735 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:10,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:44:10,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 17:44:10,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:10,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 17:44:10,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:15,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:29,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:29,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521964848] [2021-11-23 17:44:29,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521964848] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:29,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [753426690] [2021-11-23 17:44:29,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:44:29,428 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:44:29,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:44:29,437 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:44:29,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 17:44:29,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 17:44:29,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:29,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 17:44:29,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 17:44:32,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:51,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [753426690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:51,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128666056] [2021-11-23 17:44:51,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:44:51,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:44:51,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:44:51,270 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:44:51,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 17:44:51,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 17:44:51,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:51,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:44:51,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:44:59,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:45:19,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128666056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:19,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:45:19,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 14, 18, 14, 14] total 80 [2021-11-23 17:45:19,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278269163] [2021-11-23 17:45:19,263 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:45:19,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-23 17:45:19,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:19,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-23 17:45:19,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1149, Invalid=5171, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 17:45:19,267 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 80 states, 80 states have (on average 1.8625) internal successors, (149), 80 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:46:11,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:46:11,890 INFO L93 Difference]: Finished difference Result 194 states and 215 transitions. [2021-11-23 17:46:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-23 17:46:11,895 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.8625) internal successors, (149), 80 states have internal predecessors, (149), 0 states have call successors, (0), 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 [2021-11-23 17:46:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:46:11,896 INFO L225 Difference]: With dead ends: 194 [2021-11-23 17:46:11,896 INFO L226 Difference]: Without dead ends: 151 [2021-11-23 17:46:11,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4548 ImplicationChecksByTransitivity, 105.5s TimeCoverageRelationStatistics Valid=2512, Invalid=12740, Unknown=0, NotChecked=0, Total=15252 [2021-11-23 17:46:11,900 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 165 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 737 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:46:11,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 397 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 730 Invalid, 0 Unknown, 737 Unchecked, 7.0s Time] [2021-11-23 17:46:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-23 17:46:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 77. [2021-11-23 17:46:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.263157894736842) internal successors, (96), 76 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:46:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 96 transitions. [2021-11-23 17:46:11,929 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 96 transitions. Word has length 30 [2021-11-23 17:46:11,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:46:11,929 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 96 transitions. [2021-11-23 17:46:11,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.8625) internal successors, (149), 80 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:46:11,930 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 96 transitions. [2021-11-23 17:46:11,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 17:46:11,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:46:11,931 INFO L514 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:46:11,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:46:12,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:46:12,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-23 17:46:12,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:46:12,539 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:46:12,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:46:12,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2037430069, now seen corresponding path program 4 times [2021-11-23 17:46:12,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:46:12,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709699346] [2021-11-23 17:46:12,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:46:12,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:46:12,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:46:12,541 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:46:12,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:46:12,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:46:12,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:46:12,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-23 17:46:12,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:46:13,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:46:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:46:15,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:46:15,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709699346] [2021-11-23 17:46:15,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709699346] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:46:15,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [792950726] [2021-11-23 17:46:15,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:46:15,967 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:46:15,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:46:15,968 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:46:15,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 17:46:16,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:46:16,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:46:16,195 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-23 17:46:16,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:46:18,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:46:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:46:23,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [792950726] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:46:23,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725245740] [2021-11-23 17:46:23,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:46:23,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:46:23,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:46:23,526 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:46:23,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 17:46:23,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:46:23,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:46:23,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-23 17:46:23,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:46:24,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:46:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:46:32,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725245740] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:46:32,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:46:32,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 29, 29, 29, 29] total 132 [2021-11-23 17:46:32,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700701833] [2021-11-23 17:46:32,627 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:46:32,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-23 17:46:32,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:46:32,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-23 17:46:32,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4027, Invalid=13265, Unknown=0, NotChecked=0, Total=17292 [2021-11-23 17:46:32,630 INFO L87 Difference]: Start difference. First operand 77 states and 96 transitions. Second operand has 132 states, 132 states have (on average 1.106060606060606) internal successors, (146), 132 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:48:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:48:40,944 INFO L93 Difference]: Finished difference Result 425 states and 525 transitions. [2021-11-23 17:48:40,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-11-23 17:48:40,949 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.106060606060606) internal successors, (146), 132 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-23 17:48:40,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:48:40,952 INFO L225 Difference]: With dead ends: 425 [2021-11-23 17:48:40,952 INFO L226 Difference]: Without dead ends: 423 [2021-11-23 17:48:40,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19692 ImplicationChecksByTransitivity, 132.6s TimeCoverageRelationStatistics Valid=15971, Invalid=56659, Unknown=0, NotChecked=0, Total=72630 [2021-11-23 17:48:40,961 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 4767 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 4954 mSolverCounterSat, 1937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4767 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 6891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1937 IncrementalHoareTripleChecker+Valid, 4954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:48:40,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4767 Valid, 1182 Invalid, 6891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1937 Valid, 4954 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time] [2021-11-23 17:48:40,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-23 17:48:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 105. [2021-11-23 17:48:41,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.4615384615384615) internal successors, (152), 104 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:48:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 152 transitions. [2021-11-23 17:48:41,022 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 152 transitions. Word has length 32 [2021-11-23 17:48:41,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:48:41,022 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 152 transitions. [2021-11-23 17:48:41,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.106060606060606) internal successors, (146), 132 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:48:41,023 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 152 transitions. [2021-11-23 17:48:41,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 17:48:41,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:48:41,025 INFO L514 BasicCegarLoop]: trace histogram [21, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:48:41,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-23 17:48:41,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:48:41,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:48:41,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:48:41,627 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:48:41,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:48:41,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1987600657, now seen corresponding path program 4 times [2021-11-23 17:48:41,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:48:41,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375903710] [2021-11-23 17:48:41,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:48:41,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:48:41,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:48:41,633 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:48:41,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:48:41,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:48:41,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:48:41,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 17:48:41,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:48:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:48:42,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:48:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:48:44,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:48:44,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375903710] [2021-11-23 17:48:44,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375903710] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:48:44,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1219889144] [2021-11-23 17:48:44,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:48:44,700 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:48:44,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:48:44,701 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:48:44,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-23 17:48:44,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:48:44,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:48:44,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-23 17:48:44,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:48:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:48:47,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:48:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:48:51,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1219889144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:48:51,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484983872] [2021-11-23 17:48:51,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:48:51,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:48:51,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:48:51,488 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:48:51,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 17:48:51,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:48:51,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:48:51,564 WARN L261 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-23 17:48:51,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:48:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:48:52,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:48:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:48:52,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484983872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:48:52,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:48:52,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 29, 29, 30, 30] total 105 [2021-11-23 17:48:52,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673235506] [2021-11-23 17:48:52,714 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:48:52,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-23 17:48:52,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:48:52,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-23 17:48:52,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2023, Invalid=8897, Unknown=0, NotChecked=0, Total=10920 [2021-11-23 17:48:52,716 INFO L87 Difference]: Start difference. First operand 105 states and 152 transitions. Second operand has 105 states, 105 states have (on average 1.2952380952380953) internal successors, (136), 105 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:50:05,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:50:05,316 INFO L93 Difference]: Finished difference Result 631 states and 700 transitions. [2021-11-23 17:50:05,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-11-23 17:50:05,317 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.2952380952380953) internal successors, (136), 105 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-23 17:50:05,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:50:05,321 INFO L225 Difference]: With dead ends: 631 [2021-11-23 17:50:05,321 INFO L226 Difference]: Without dead ends: 629 [2021-11-23 17:50:05,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22753 ImplicationChecksByTransitivity, 70.9s TimeCoverageRelationStatistics Valid=14879, Invalid=54027, Unknown=0, NotChecked=0, Total=68906 [2021-11-23 17:50:05,329 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 2501 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 4008 mSolverCounterSat, 1095 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2501 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 5103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1095 IncrementalHoareTripleChecker+Valid, 4008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:50:05,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2501 Valid, 949 Invalid, 5103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1095 Valid, 4008 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2021-11-23 17:50:05,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-11-23 17:50:05,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 201. [2021-11-23 17:50:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.255) internal successors, (251), 200 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:50:05,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 251 transitions. [2021-11-23 17:50:05,492 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 251 transitions. Word has length 38 [2021-11-23 17:50:05,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:50:05,493 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 251 transitions. [2021-11-23 17:50:05,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.2952380952380953) internal successors, (136), 105 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:50:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 251 transitions. [2021-11-23 17:50:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 17:50:05,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:50:05,495 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:50:05,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:50:05,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-23 17:50:05,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:50:06,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:50:06,102 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:50:06,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:50:06,102 INFO L85 PathProgramCache]: Analyzing trace with hash 416628149, now seen corresponding path program 5 times [2021-11-23 17:50:06,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:50:06,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140920065] [2021-11-23 17:50:06,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:50:06,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:50:06,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:50:06,104 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:50:06,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 17:50:06,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-23 17:50:06,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:50:06,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 17:50:06,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:50:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:50:09,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:50:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:50:27,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:50:27,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140920065] [2021-11-23 17:50:27,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140920065] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:50:27,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1676801014] [2021-11-23 17:50:27,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:50:27,700 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:50:27,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:50:27,700 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:50:27,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-23 17:50:27,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-23 17:50:27,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:50:27,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 17:50:27,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:50:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 73 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:50:35,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:51:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 61 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 17:51:21,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1676801014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:51:21,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079197621] [2021-11-23 17:51:21,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:51:21,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:51:21,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:51:21,833 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:51:21,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98231eda-6a25-48ce-a583-3745c8478105/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 17:51:21,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-23 17:51:21,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:51:21,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:51:21,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:51:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 73 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:51:22,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:52:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 73 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:52:00,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079197621] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:52:00,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:52:00,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 18, 20, 18, 18] total 91 [2021-11-23 17:52:00,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223502480] [2021-11-23 17:52:00,451 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:52:00,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-23 17:52:00,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:52:00,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-23 17:52:00,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=7291, Unknown=0, NotChecked=0, Total=8190 [2021-11-23 17:52:00,453 INFO L87 Difference]: Start difference. First operand 201 states and 251 transitions. Second operand has 91 states, 91 states have (on average 2.021978021978022) internal successors, (184), 91 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)