./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P --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 40c004ecbeb3948e318f4c5fc8011bd289b059bb9dbb2959c45853a9680cf20f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:56:55,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:56:55,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:56:55,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:56:55,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:56:55,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:56:55,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:56:55,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:56:55,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:56:55,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:56:55,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:56:55,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:56:55,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:56:55,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:56:55,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:56:55,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:56:55,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:56:55,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:56:55,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:56:55,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:56:55,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:56:55,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:56:55,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:56:55,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:56:55,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:56:55,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:56:55,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:56:55,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:56:55,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:56:55,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:56:55,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:56:55,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:56:55,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:56:55,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:56:55,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:56:55,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:56:55,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:56:55,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:56:55,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:56:55,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:56:55,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:56:55,942 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:56:55,970 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:56:55,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:56:55,971 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:56:55,972 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:56:55,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:56:55,973 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:56:55,974 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:56:55,974 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:56:55,974 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:56:55,975 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:56:55,975 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:56:55,976 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:56:55,976 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:56:55,976 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:56:55,977 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:56:55,977 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:56:55,978 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:56:55,978 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:56:55,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:56:55,980 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:56:55,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:56:55,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:56:55,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:56:55,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:56:55,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:56:55,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:56:55,982 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:56:55,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:56:55,983 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:56:55,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:56:55,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:56:55,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:56:55,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:56:55,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:56:55,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:56:55,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:56:55,985 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:56:55,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:56:55,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:56:55,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:56:55,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:56:55,986 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_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40c004ecbeb3948e318f4c5fc8011bd289b059bb9dbb2959c45853a9680cf20f [2021-11-20 23:56:56,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:56:56,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:56:56,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:56:56,332 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:56:56,333 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:56:56,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c [2021-11-20 23:56:56,431 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/data/033be515d/66f2b6b913374a48b744ae9827728e38/FLAG28fdd36b9 [2021-11-20 23:56:56,963 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:56:56,968 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c [2021-11-20 23:56:56,978 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/data/033be515d/66f2b6b913374a48b744ae9827728e38/FLAG28fdd36b9 [2021-11-20 23:56:57,313 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/data/033be515d/66f2b6b913374a48b744ae9827728e38 [2021-11-20 23:56:57,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:56:57,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:56:57,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:56:57,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:56:57,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:56:57,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:56:57" (1/1) ... [2021-11-20 23:56:57,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@416edc4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:57, skipping insertion in model container [2021-11-20 23:56:57,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:56:57" (1/1) ... [2021-11-20 23:56:57,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:56:57,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:56:57,591 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_4129af06-3b59-4b63-bcb4-6c1691a0755a/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c[490,503] [2021-11-20 23:56:57,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:56:57,645 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:56:57,660 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c[490,503] [2021-11-20 23:56:57,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:56:57,690 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:56:57,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:57 WrapperNode [2021-11-20 23:56:57,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:56:57,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:56:57,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:56:57,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:56:57,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:57" (1/1) ... [2021-11-20 23:56:57,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:57" (1/1) ... [2021-11-20 23:56:57,727 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2021-11-20 23:56:57,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:56:57,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:56:57,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:56:57,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:56:57,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:57" (1/1) ... [2021-11-20 23:56:57,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:57" (1/1) ... [2021-11-20 23:56:57,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:57" (1/1) ... [2021-11-20 23:56:57,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:57" (1/1) ... [2021-11-20 23:56:57,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:57" (1/1) ... [2021-11-20 23:56:57,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:57" (1/1) ... [2021-11-20 23:56:57,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:57" (1/1) ... [2021-11-20 23:56:57,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:56:57,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:56:57,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:56:57,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:56:57,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:57" (1/1) ... [2021-11-20 23:56:57,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:56:57,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:56:57,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:56:57,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:56:57,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:56:57,838 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:56:57,838 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:56:57,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:56:57,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:56:57,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:56:57,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:56:57,839 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:56:57,907 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:56:57,909 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:56:58,123 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:56:58,165 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:56:58,165 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 23:56:58,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:56:58 BoogieIcfgContainer [2021-11-20 23:56:58,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:56:58,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:56:58,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:56:58,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:56:58,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:56:57" (1/3) ... [2021-11-20 23:56:58,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4c5b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:56:58, skipping insertion in model container [2021-11-20 23:56:58,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:57" (2/3) ... [2021-11-20 23:56:58,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4c5b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:56:58, skipping insertion in model container [2021-11-20 23:56:58,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:56:58" (3/3) ... [2021-11-20 23:56:58,204 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound1.c [2021-11-20 23:56:58,209 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:56:58,209 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:56:58,264 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:56:58,285 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 [2021-11-20 23:56:58,286 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:56:58,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 23:56:58,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 23:56:58,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:56:58,324 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:56:58,325 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:56:58,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:56:58,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1539547475, now seen corresponding path program 1 times [2021-11-20 23:56:58,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:56:58,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527116483] [2021-11-20 23:56:58,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:56:58,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:56:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:56:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 23:56:58,563 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:56:58,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527116483] [2021-11-20 23:56:58,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527116483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:56:58,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:56:58,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:56:58,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810901143] [2021-11-20 23:56:58,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:56:58,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:56:58,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:56:58,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:56:58,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:56:58,619 INFO L87 Difference]: Start difference. First operand has 30 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 23:56:58,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:56:58,687 INFO L93 Difference]: Finished difference Result 51 states and 79 transitions. [2021-11-20 23:56:58,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:56:58,690 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2021-11-20 23:56:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:56:58,700 INFO L225 Difference]: With dead ends: 51 [2021-11-20 23:56:58,701 INFO L226 Difference]: Without dead ends: 28 [2021-11-20 23:56:58,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:56:58,711 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:56:58,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:56:58,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-20 23:56:58,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-20 23:56:58,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:56:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2021-11-20 23:56:58,762 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 20 [2021-11-20 23:56:58,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:56:58,765 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2021-11-20 23:56:58,766 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 23:56:58,766 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2021-11-20 23:56:58,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 23:56:58,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:56:58,769 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:56:58,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:56:58,771 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:56:58,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:56:58,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1863391506, now seen corresponding path program 1 times [2021-11-20 23:56:58,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:56:58,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802672214] [2021-11-20 23:56:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:56:58,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:56:58,812 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:56:58,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589002212] [2021-11-20 23:56:58,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:56:58,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:56:58,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:56:58,820 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:56:58,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:56:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:56:58,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:56:58,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:56:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:56:59,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:56:59,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:56:59,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802672214] [2021-11-20 23:56:59,132 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:56:59,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589002212] [2021-11-20 23:56:59,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589002212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:56:59,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:56:59,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:56:59,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350149743] [2021-11-20 23:56:59,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:56:59,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:56:59,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:56:59,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:56:59,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:56:59,137 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 23:56:59,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:56:59,270 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-11-20 23:56:59,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:56:59,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2021-11-20 23:56:59,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:56:59,273 INFO L225 Difference]: With dead ends: 47 [2021-11-20 23:56:59,273 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 23:56:59,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:56:59,276 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 29 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:56:59,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 95 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:56:59,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 23:56:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2021-11-20 23:56:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:56:59,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-11-20 23:56:59,288 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 21 [2021-11-20 23:56:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:56:59,288 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-11-20 23:56:59,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 23:56:59,289 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-11-20 23:56:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 23:56:59,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:56:59,290 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:56:59,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:56:59,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:56:59,514 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:56:59,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:56:59,515 INFO L85 PathProgramCache]: Analyzing trace with hash -73319670, now seen corresponding path program 1 times [2021-11-20 23:56:59,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:56:59,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770065954] [2021-11-20 23:56:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:56:59,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:56:59,532 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:56:59,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119920074] [2021-11-20 23:56:59,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:56:59,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:56:59,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:56:59,537 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:56:59,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:56:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:56:59,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 23:56:59,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:57:00,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 23:57:00,433 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:00,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770065954] [2021-11-20 23:57:00,433 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:57:00,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119920074] [2021-11-20 23:57:00,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119920074] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:57:00,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:57:00,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 13 [2021-11-20 23:57:00,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874847612] [2021-11-20 23:57:00,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:00,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:57:00,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:00,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:57:00,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:57:00,438 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 23:57:00,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:00,552 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-11-20 23:57:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:57:00,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2021-11-20 23:57:00,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:00,558 INFO L225 Difference]: With dead ends: 46 [2021-11-20 23:57:00,559 INFO L226 Difference]: Without dead ends: 44 [2021-11-20 23:57:00,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-20 23:57:00,564 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 27 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:00,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 146 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:57:00,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-20 23:57:00,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-11-20 23:57:00,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 23:57:00,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2021-11-20 23:57:00,583 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 24 [2021-11-20 23:57:00,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:00,583 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2021-11-20 23:57:00,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 23:57:00,584 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2021-11-20 23:57:00,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 23:57:00,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:00,585 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:00,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 23:57:00,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:00,811 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:00,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:00,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1101454984, now seen corresponding path program 1 times [2021-11-20 23:57:00,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:00,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512614139] [2021-11-20 23:57:00,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:00,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:00,830 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:57:00,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434764637] [2021-11-20 23:57:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:00,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:00,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:00,851 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:00,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:57:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:00,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:57:00,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:57:01,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:57:01,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:01,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512614139] [2021-11-20 23:57:01,176 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:57:01,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434764637] [2021-11-20 23:57:01,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434764637] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:01,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [72730188] [2021-11-20 23:57:01,202 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-20 23:57:01,202 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:57:01,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:57:01,213 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:57:01,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:57:03,577 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-20 23:57:03,606 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:57:04,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [72730188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:04,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:57:04,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7, 7] total 17 [2021-11-20 23:57:04,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604301786] [2021-11-20 23:57:04,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:04,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 23:57:04,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:04,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 23:57:04,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:57:04,115 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 12 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:57:04,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:04,376 INFO L93 Difference]: Finished difference Result 72 states and 98 transitions. [2021-11-20 23:57:04,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:57:04,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2021-11-20 23:57:04,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:04,383 INFO L225 Difference]: With dead ends: 72 [2021-11-20 23:57:04,384 INFO L226 Difference]: Without dead ends: 53 [2021-11-20 23:57:04,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:57:04,390 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 71 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:04,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 70 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:57:04,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-20 23:57:04,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2021-11-20 23:57:04,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 23:57:04,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2021-11-20 23:57:04,422 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 26 [2021-11-20 23:57:04,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:04,422 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2021-11-20 23:57:04,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:57:04,423 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2021-11-20 23:57:04,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 23:57:04,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:04,425 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:04,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:04,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:04,643 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:04,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:04,644 INFO L85 PathProgramCache]: Analyzing trace with hash -156943002, now seen corresponding path program 1 times [2021-11-20 23:57:04,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:04,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344455994] [2021-11-20 23:57:04,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:04,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:04,657 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:57:04,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138025205] [2021-11-20 23:57:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:04,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:04,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:04,659 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:04,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:57:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:04,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 23:57:04,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:57:05,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 23:57:05,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344455994] [2021-11-20 23:57:05,185 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:57:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138025205] [2021-11-20 23:57:05,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138025205] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:57:05,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:57:05,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 13 [2021-11-20 23:57:05,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64723460] [2021-11-20 23:57:05,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:05,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:57:05,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:05,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:57:05,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:57:05,187 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:57:05,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:05,273 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2021-11-20 23:57:05,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:57:05,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2021-11-20 23:57:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:05,277 INFO L225 Difference]: With dead ends: 52 [2021-11-20 23:57:05,277 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 23:57:05,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-20 23:57:05,278 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 27 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:05,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 149 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:57:05,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 23:57:05,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-11-20 23:57:05,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 32 states have internal predecessors, (37), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 23:57:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2021-11-20 23:57:05,304 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 29 [2021-11-20 23:57:05,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:05,305 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2021-11-20 23:57:05,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:57:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2021-11-20 23:57:05,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 23:57:05,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:05,308 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:05,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:05,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:05,523 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:05,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1156410442, now seen corresponding path program 1 times [2021-11-20 23:57:05,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:05,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431027189] [2021-11-20 23:57:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:05,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:05,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:57:05,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703193204] [2021-11-20 23:57:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:05,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:05,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:05,538 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:05,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:57:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:05,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:57:05,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 23:57:05,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:57:05,705 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:05,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431027189] [2021-11-20 23:57:05,708 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:57:05,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703193204] [2021-11-20 23:57:05,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703193204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:05,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:05,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:57:05,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545221360] [2021-11-20 23:57:05,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:05,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:57:05,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:05,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:57:05,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:57:05,711 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 23:57:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:05,783 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2021-11-20 23:57:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:57:05,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2021-11-20 23:57:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:05,788 INFO L225 Difference]: With dead ends: 72 [2021-11-20 23:57:05,788 INFO L226 Difference]: Without dead ends: 70 [2021-11-20 23:57:05,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:57:05,790 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:05,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 122 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:57:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-20 23:57:05,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-11-20 23:57:05,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 40 states have (on average 1.225) internal successors, (49), 41 states have internal predecessors, (49), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-20 23:57:05,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 90 transitions. [2021-11-20 23:57:05,841 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 90 transitions. Word has length 34 [2021-11-20 23:57:05,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:05,842 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 90 transitions. [2021-11-20 23:57:05,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 23:57:05,842 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 90 transitions. [2021-11-20 23:57:05,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 23:57:05,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:05,846 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:05,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:06,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 23:57:06,071 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:06,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:06,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1480588378, now seen corresponding path program 1 times [2021-11-20 23:57:06,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:06,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241896040] [2021-11-20 23:57:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:06,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:06,083 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:57:06,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811569961] [2021-11-20 23:57:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:06,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:06,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:06,085 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:06,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:57:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:06,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 23:57:06,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 23:57:06,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 23:57:06,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:06,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241896040] [2021-11-20 23:57:06,479 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:57:06,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811569961] [2021-11-20 23:57:06,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811569961] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:57:06,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:57:06,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2021-11-20 23:57:06,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582548780] [2021-11-20 23:57:06,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:06,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:57:06,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:06,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:57:06,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:57:06,482 INFO L87 Difference]: Start difference. First operand 67 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 23:57:06,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:06,617 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2021-11-20 23:57:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:57:06,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 39 [2021-11-20 23:57:06,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:06,619 INFO L225 Difference]: With dead ends: 74 [2021-11-20 23:57:06,619 INFO L226 Difference]: Without dead ends: 72 [2021-11-20 23:57:06,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:57:06,620 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:06,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 104 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:57:06,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-20 23:57:06,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-11-20 23:57:06,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 44 states have internal predecessors, (52), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-20 23:57:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2021-11-20 23:57:06,638 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 39 [2021-11-20 23:57:06,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:06,638 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2021-11-20 23:57:06,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 23:57:06,639 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2021-11-20 23:57:06,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 23:57:06,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:06,640 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:06,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:06,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:06,857 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:06,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:06,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1193022788, now seen corresponding path program 1 times [2021-11-20 23:57:06,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:06,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004291003] [2021-11-20 23:57:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:06,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:06,868 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:57:06,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028741249] [2021-11-20 23:57:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:06,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:06,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:06,870 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:06,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 23:57:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:06,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 23:57:06,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 23:57:07,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 23:57:09,137 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:09,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004291003] [2021-11-20 23:57:09,137 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:57:09,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028741249] [2021-11-20 23:57:09,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028741249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:09,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1777759739] [2021-11-20 23:57:09,141 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-20 23:57:09,141 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:57:09,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:57:09,142 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:57:09,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:57:28,270 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2021-11-20 23:57:28,347 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-20 23:57:28,377 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:57:31,873 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:57:31,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:57:31,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-11-20 23:57:31,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558110095] [2021-11-20 23:57:31,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:57:31,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 23:57:31,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:31,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 23:57:31,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1560, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 23:57:31,877 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-20 23:57:51,884 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 23:57:52,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:52,436 INFO L93 Difference]: Finished difference Result 281 states and 415 transitions. [2021-11-20 23:57:52,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-20 23:57:52,437 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 51 [2021-11-20 23:57:52,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:52,442 INFO L225 Difference]: With dead ends: 281 [2021-11-20 23:57:52,442 INFO L226 Difference]: Without dead ends: 244 [2021-11-20 23:57:52,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 106 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=767, Invalid=4933, Unknown=0, NotChecked=0, Total=5700 [2021-11-20 23:57:52,447 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 238 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 364 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:52,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 447 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 1415 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2021-11-20 23:57:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-20 23:57:52,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 166. [2021-11-20 23:57:52,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 102 states have (on average 1.2647058823529411) internal successors, (129), 104 states have internal predecessors, (129), 55 states have call successors, (55), 8 states have call predecessors, (55), 8 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2021-11-20 23:57:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 237 transitions. [2021-11-20 23:57:52,509 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 237 transitions. Word has length 51 [2021-11-20 23:57:52,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:52,509 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 237 transitions. [2021-11-20 23:57:52,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-20 23:57:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 237 transitions. [2021-11-20 23:57:52,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 23:57:52,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:52,512 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:52,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:52,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:52,739 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:52,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:52,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1900492274, now seen corresponding path program 2 times [2021-11-20 23:57:52,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:52,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396791612] [2021-11-20 23:57:52,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:52,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:52,750 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:57:52,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909090973] [2021-11-20 23:57:52,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:57:52,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:52,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:52,758 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:52,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 23:57:52,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:57:52,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:57:52,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:57:52,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 23:57:52,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:57:52,927 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:52,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396791612] [2021-11-20 23:57:52,927 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:57:52,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909090973] [2021-11-20 23:57:52,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909090973] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:52,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:52,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:57:52,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561120827] [2021-11-20 23:57:52,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:52,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:57:52,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:52,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:57:52,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:57:52,929 INFO L87 Difference]: Start difference. First operand 166 states and 237 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-20 23:57:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:53,026 INFO L93 Difference]: Finished difference Result 206 states and 287 transitions. [2021-11-20 23:57:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:57:53,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 56 [2021-11-20 23:57:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:53,029 INFO L225 Difference]: With dead ends: 206 [2021-11-20 23:57:53,029 INFO L226 Difference]: Without dead ends: 171 [2021-11-20 23:57:53,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:57:53,031 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 18 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:53,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 147 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:57:53,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-20 23:57:53,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 166. [2021-11-20 23:57:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 102 states have (on average 1.2254901960784315) internal successors, (125), 104 states have internal predecessors, (125), 55 states have call successors, (55), 8 states have call predecessors, (55), 8 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2021-11-20 23:57:53,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 233 transitions. [2021-11-20 23:57:53,071 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 233 transitions. Word has length 56 [2021-11-20 23:57:53,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:53,072 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 233 transitions. [2021-11-20 23:57:53,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-20 23:57:53,072 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 233 transitions. [2021-11-20 23:57:53,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 23:57:53,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:53,074 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:53,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 23:57:53,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:53,291 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:53,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:53,291 INFO L85 PathProgramCache]: Analyzing trace with hash 852275598, now seen corresponding path program 1 times [2021-11-20 23:57:53,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:53,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912321960] [2021-11-20 23:57:53,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:53,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:53,309 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:57:53,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529298705] [2021-11-20 23:57:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:53,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:53,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:53,317 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:53,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 23:57:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:53,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:57:53,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-20 23:57:53,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:57:53,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:53,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912321960] [2021-11-20 23:57:53,516 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:57:53,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529298705] [2021-11-20 23:57:53,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529298705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:53,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:53,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:57:53,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267043573] [2021-11-20 23:57:53,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:53,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:57:53,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:53,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:57:53,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:57:53,520 INFO L87 Difference]: Start difference. First operand 166 states and 233 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 23:57:53,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:53,611 INFO L93 Difference]: Finished difference Result 269 states and 373 transitions. [2021-11-20 23:57:53,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:57:53,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 59 [2021-11-20 23:57:53,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:53,614 INFO L225 Difference]: With dead ends: 269 [2021-11-20 23:57:53,614 INFO L226 Difference]: Without dead ends: 184 [2021-11-20 23:57:53,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:57:53,616 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:53,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 114 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:57:53,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-20 23:57:53,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 170. [2021-11-20 23:57:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 104 states have (on average 1.1923076923076923) internal successors, (124), 105 states have internal predecessors, (124), 57 states have call successors, (57), 8 states have call predecessors, (57), 8 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2021-11-20 23:57:53,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 237 transitions. [2021-11-20 23:57:53,661 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 237 transitions. Word has length 59 [2021-11-20 23:57:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:53,661 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 237 transitions. [2021-11-20 23:57:53,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 23:57:53,662 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 237 transitions. [2021-11-20 23:57:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 23:57:53,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:53,663 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:53,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:53,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 23:57:53,866 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:53,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:53,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1568094960, now seen corresponding path program 1 times [2021-11-20 23:57:53,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:53,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320642169] [2021-11-20 23:57:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:53,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:53,879 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:57:53,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237097619] [2021-11-20 23:57:53,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:53,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:53,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:53,881 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:53,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 23:57:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:53,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 23:57:53,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 33 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 23:57:54,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 23:57:54,441 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:54,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320642169] [2021-11-20 23:57:54,441 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:57:54,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237097619] [2021-11-20 23:57:54,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237097619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:54,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [956471056] [2021-11-20 23:57:54,444 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-20 23:57:54,444 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:57:54,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:57:54,445 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:57:54,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:58:06,181 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2021-11-20 23:58:06,278 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-20 23:58:06,313 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:58:08,195 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:58:08,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:58:08,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-11-20 23:58:08,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515878553] [2021-11-20 23:58:08,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:58:08,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 23:58:08,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:58:08,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 23:58:08,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 23:58:08,198 INFO L87 Difference]: Start difference. First operand 170 states and 237 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 15 states have internal predecessors, (37), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-20 23:58:08,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:58:08,470 INFO L93 Difference]: Finished difference Result 203 states and 276 transitions. [2021-11-20 23:58:08,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:58:08,471 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 15 states have internal predecessors, (37), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 59 [2021-11-20 23:58:08,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:58:08,472 INFO L225 Difference]: With dead ends: 203 [2021-11-20 23:58:08,472 INFO L226 Difference]: Without dead ends: 62 [2021-11-20 23:58:08,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 23:58:08,476 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 23 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:58:08,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 271 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:58:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-20 23:58:08,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-11-20 23:58:08,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:58:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-11-20 23:58:08,499 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 59 [2021-11-20 23:58:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:58:08,500 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-11-20 23:58:08,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 15 states have internal predecessors, (37), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-20 23:58:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-11-20 23:58:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 23:58:08,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:58:08,502 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:58:08,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 23:58:08,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:08,723 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:58:08,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:58:08,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1729932497, now seen corresponding path program 1 times [2021-11-20 23:58:08,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:58:08,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399632247] [2021-11-20 23:58:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:08,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:58:08,735 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:58:08,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785572867] [2021-11-20 23:58:08,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:08,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:08,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:58:08,737 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:58:08,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 23:58:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:08,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 23:58:08,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:58:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 90 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-20 23:58:09,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:58:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-20 23:58:09,514 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:58:09,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399632247] [2021-11-20 23:58:09,515 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:58:09,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785572867] [2021-11-20 23:58:09,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785572867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:58:09,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1877453548] [2021-11-20 23:58:09,519 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-20 23:58:09,519 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:58:09,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:58:09,520 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:58:09,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:58:15,455 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2021-11-20 23:58:15,499 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-20 23:58:15,521 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:58:17,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1877453548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:58:17,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:58:17,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [10, 10] total 31 [2021-11-20 23:58:17,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979467646] [2021-11-20 23:58:17,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:58:17,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 23:58:17,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:58:17,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 23:58:17,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2021-11-20 23:58:17,077 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 16 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-20 23:58:17,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:58:17,299 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2021-11-20 23:58:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 23:58:17,299 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 81 [2021-11-20 23:58:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:58:17,300 INFO L225 Difference]: With dead ends: 72 [2021-11-20 23:58:17,300 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 23:58:17,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 203 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2021-11-20 23:58:17,301 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:58:17,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 34 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:58:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 23:58:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 23:58:17,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:58:17,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 23:58:17,303 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 81 [2021-11-20 23:58:17,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:58:17,303 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 23:58:17,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-20 23:58:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 23:58:17,304 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 23:58:17,306 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 23:58:17,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 23:58:17,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:17,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-20 23:58:20,293 INFO L854 garLoopResultBuilder]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse18 (select |#memory_int| 1))) (let ((.cse0 (= (select |#length| 3) 12)) (.cse4 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|)) (.cse5 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)) (.cse15 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (.cse1 (= 11 (select |#length| 2))) (.cse2 (= 2 (select |#length| 1))) (.cse3 (= (select |#valid| 3) 1)) (.cse6 (<= |ULTIMATE.start_main_~x~0#1| 1)) (.cse7 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse8 (= (select |#valid| 1) 1)) (.cse9 (<= |ULTIMATE.start_main_~y~0#1| 1)) (.cse10 (= (select |#valid| 0) 0)) (.cse11 (= (select |#valid| 2) 1)) (.cse12 (= |#NULL.offset| 0)) (.cse13 (= (select .cse18 0) 48)) (.cse14 (= (select .cse18 1) 0)) (.cse16 (< 0 |#StackHeapBarrier|)) (.cse17 (= |#NULL.base| 0))) (or (and .cse0 .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~b~0#1| (+ .cse4 .cse5)) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse13 .cse14 (= |ULTIMATE.start_main_~a~0#1| .cse15) (= |ULTIMATE.start_main_~s~0#1| 1) .cse16 .cse17) (and (<= 0 |ULTIMATE.start_main_~b~0#1|) .cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|) (= (+ .cse4 .cse5 |ULTIMATE.start_main_~a~0#1|) .cse15) .cse1 .cse2 .cse3 (<= 0 |ULTIMATE.start_main_~c~0#1|) (< (* 2 |ULTIMATE.start_main_~c~0#1|) 1) .cse6 .cse7 .cse8 (< (* 2 |ULTIMATE.start_main_~b~0#1|) 1) .cse9 .cse10 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse11 .cse12 .cse13 .cse14 .cse16 .cse17)))) [2021-11-20 23:58:20,293 INFO L854 garLoopResultBuilder]: At program point L35-3(lines 35 73) the Hoare annotation is: (let ((.cse3 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse4 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (let ((.cse0 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|)) (.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)) (.cse2 (+ .cse3 .cse4)) (.cse5 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= (+ .cse0 .cse1 |ULTIMATE.start_main_~a~0#1|) .cse2) (or (<= |ULTIMATE.start_main_~b~0#1| (div |ULTIMATE.start_main_~c~0#1| 2)) (= (+ |ULTIMATE.start_main_~b~0#1| .cse3 .cse4) (+ (* 2 .cse0) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~q~0#1|) (* 2 .cse1))) (< |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~b~0#1|) (not (= |ULTIMATE.start_main_~b~0#1| (+ .cse0 .cse1)))) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (or (= |ULTIMATE.start_main_~b~0#1| 0) (< |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~a~0#1| .cse2)) (<= |ULTIMATE.start_main_~x~0#1| 1) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= (select |#valid| 1) 1) (<= |ULTIMATE.start_main_~y~0#1| 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse5 0) 48) (= (select .cse5 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)))) [2021-11-20 23:58:20,293 INFO L854 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (= (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|) |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 1) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~v~0#1|) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start_main_~x~0#1| 1) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (= |ULTIMATE.start_main_~s~0#1| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-20 23:58:20,293 INFO L858 garLoopResultBuilder]: For program point L36(lines 36 37) no Hoare annotation was computed. [2021-11-20 23:58:20,294 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-20 23:58:20,294 INFO L854 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= |ULTIMATE.start_main_~x~0#1| 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (<= 0 (+ |ULTIMATE.start_main_~y~0#1| 2147483648)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-20 23:58:20,294 INFO L854 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= |ULTIMATE.start_main_~x~0#1| 1) (= (select |#valid| 1) 1) (<= |ULTIMATE.start_main_~y~0#1| 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-20 23:58:20,294 INFO L858 garLoopResultBuilder]: For program point L53(lines 49 59) no Hoare annotation was computed. [2021-11-20 23:58:20,294 INFO L854 garLoopResultBuilder]: At program point L49-2(lines 49 59) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (= (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|) |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 1) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~v~0#1|) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start_main_~x~0#1| 1) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (= |ULTIMATE.start_main_~s~0#1| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-20 23:58:20,294 INFO L858 garLoopResultBuilder]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2021-11-20 23:58:20,295 INFO L861 garLoopResultBuilder]: At program point L74(line 74) the Hoare annotation is: true [2021-11-20 23:58:20,295 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-20 23:58:20,295 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= |ULTIMATE.start_main_~x~0#1| 1) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= (select |#valid| 1) 1) (<= |ULTIMATE.start_main_~y~0#1| 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-20 23:58:20,295 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (= (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|) |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 1) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~v~0#1|) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start_main_~x~0#1| 1) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (= |ULTIMATE.start_main_~s~0#1| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-20 23:58:20,296 INFO L854 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (= (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|) |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 1) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~v~0#1|) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start_main_~x~0#1| 1) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (= |ULTIMATE.start_main_~s~0#1| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-20 23:58:20,296 INFO L854 garLoopResultBuilder]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse14 (select |#memory_int| 1))) (let ((.cse0 (= (select |#length| 3) 12)) (.cse1 (= 11 (select |#length| 2))) (.cse2 (= 2 (select |#length| 1))) (.cse3 (= (select |#valid| 3) 1)) (.cse4 (<= |ULTIMATE.start_main_~x~0#1| 1)) (.cse5 (= (select |#valid| 1) 1)) (.cse6 (= (select |#valid| 0) 0)) (.cse7 (= (select |#valid| 2) 1)) (.cse8 (= (select .cse14 0) 48)) (.cse9 (= (select .cse14 1) 0)) (.cse10 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (.cse11 (= |ULTIMATE.start_main_~s~0#1| 1)) (.cse12 (< 0 |#StackHeapBarrier|)) (.cse13 (= |#NULL.base| 0))) (or (and (<= |ULTIMATE.start_main_~q~0#1| 0) .cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 1) (<= |ULTIMATE.start_main_~c~0#1| 1) .cse1 .cse2 (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse3 (<= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~p~0#1| 1) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) .cse4 (<= 0 |ULTIMATE.start_main_~q~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) .cse5 (<= |ULTIMATE.start_main_~y~0#1| 1) .cse6 .cse7 .cse8 (<= 0 |#NULL.offset|) .cse9 .cse10 .cse11 .cse12 .cse13) (and (= |ULTIMATE.start_main_~k~0#1| 1) .cse0 (= (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|) |ULTIMATE.start_main_~v~0#1|) (<= |ULTIMATE.start_main_~v~0#1| |ULTIMATE.start_main_~b~0#1|) .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse4 .cse5 (< |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~b~0#1|) .cse6 .cse7 (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse8 .cse9 .cse10 (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) .cse11 .cse12 .cse13)))) [2021-11-20 23:58:20,296 INFO L858 garLoopResultBuilder]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2021-11-20 23:58:20,296 INFO L858 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-11-20 23:58:20,296 INFO L854 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-20 23:58:20,296 INFO L858 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-11-20 23:58:20,296 INFO L854 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (= (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|) |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 1) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~v~0#1|) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start_main_~x~0#1| 1) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (= |ULTIMATE.start_main_~s~0#1| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-20 23:58:20,296 INFO L858 garLoopResultBuilder]: For program point L43(lines 43 44) no Hoare annotation was computed. [2021-11-20 23:58:20,297 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-11-20 23:58:20,297 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-11-20 23:58:20,297 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-11-20 23:58:20,297 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-11-20 23:58:20,297 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-11-20 23:58:20,297 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-11-20 23:58:20,297 INFO L858 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-11-20 23:58:20,297 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-11-20 23:58:20,300 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:58:20,301 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 23:58:20,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:58:20 BoogieIcfgContainer [2021-11-20 23:58:20,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 23:58:20,335 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 23:58:20,335 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 23:58:20,335 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 23:58:20,335 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:56:58" (3/4) ... [2021-11-20 23:58:20,338 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-20 23:58:20,344 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-11-20 23:58:20,344 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-20 23:58:20,348 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2021-11-20 23:58:20,349 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-20 23:58:20,349 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-20 23:58:20,349 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-20 23:58:20,390 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-20 23:58:20,390 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 23:58:20,391 INFO L158 Benchmark]: Toolchain (without parser) took 83068.39ms. Allocated memory was 100.7MB in the beginning and 234.9MB in the end (delta: 134.2MB). Free memory was 65.9MB in the beginning and 112.5MB in the end (delta: -46.6MB). Peak memory consumption was 87.6MB. Max. memory is 16.1GB. [2021-11-20 23:58:20,391 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 75.5MB. Free memory was 49.1MB in the beginning and 49.1MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:58:20,391 INFO L158 Benchmark]: CACSL2BoogieTranslator took 366.61ms. Allocated memory is still 100.7MB. Free memory was 65.7MB in the beginning and 75.8MB in the end (delta: -10.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 23:58:20,392 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.99ms. Allocated memory is still 100.7MB. Free memory was 75.8MB in the beginning and 74.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:58:20,392 INFO L158 Benchmark]: Boogie Preprocessor took 23.03ms. Allocated memory is still 100.7MB. Free memory was 74.1MB in the beginning and 73.1MB in the end (delta: 973.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:58:20,393 INFO L158 Benchmark]: RCFGBuilder took 415.18ms. Allocated memory is still 100.7MB. Free memory was 73.1MB in the beginning and 62.1MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 23:58:20,393 INFO L158 Benchmark]: TraceAbstraction took 82165.47ms. Allocated memory was 100.7MB in the beginning and 234.9MB in the end (delta: 134.2MB). Free memory was 61.6MB in the beginning and 115.6MB in the end (delta: -54.0MB). Peak memory consumption was 129.2MB. Max. memory is 16.1GB. [2021-11-20 23:58:20,394 INFO L158 Benchmark]: Witness Printer took 55.49ms. Allocated memory is still 234.9MB. Free memory was 115.6MB in the beginning and 112.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:58:20,396 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 75.5MB. Free memory was 49.1MB in the beginning and 49.1MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 366.61ms. Allocated memory is still 100.7MB. Free memory was 65.7MB in the beginning and 75.8MB in the end (delta: -10.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.99ms. Allocated memory is still 100.7MB. Free memory was 75.8MB in the beginning and 74.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.03ms. Allocated memory is still 100.7MB. Free memory was 74.1MB in the beginning and 73.1MB in the end (delta: 973.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 415.18ms. Allocated memory is still 100.7MB. Free memory was 73.1MB in the beginning and 62.1MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 82165.47ms. Allocated memory was 100.7MB in the beginning and 234.9MB in the end (delta: 134.2MB). Free memory was 61.6MB in the beginning and 115.6MB in the end (delta: -54.0MB). Peak memory consumption was 129.2MB. Max. memory is 16.1GB. * Witness Printer took 55.49ms. Allocated memory is still 234.9MB. Free memory was 115.6MB in the beginning and 112.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 82.0s, OverallIterations: 12, TraceHistogramMax: 11, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 22.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 521 SdHoareTripleChecker+Valid, 7.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 470 mSDsluCounter, 1735 SdHoareTripleChecker+Invalid, 7.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1396 mSDsCounter, 484 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2186 IncrementalHoareTripleChecker+Invalid, 2671 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 484 mSolverCounterUnsat, 399 mSDtfsCounter, 2186 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1039 GetRequests, 810 SyntacticMatches, 21 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 22.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=10, InterpolantAutomatonStates: 121, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 127 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 128 PreInvPairs, 141 NumberOfFragments, 1417 HoareAnnotationTreeSize, 128 FomulaSimplifications, 306 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 15 FomulaSimplificationsInter, 2024 FormulaSimplificationTreeSizeReductionInter, 2.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 499 NumberOfCodeBlocks, 471 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 789 ConstructedInterpolants, 0 QuantifiedInterpolants, 3542 SizeOfPredicates, 54 NumberOfNonLiveVariables, 1462 ConjunctsInSsa, 175 ConjunctsInUnsatCore, 19 InterpolantComputations, 8 PerfectInterpolantSequences, 959/1029 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 8.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 5, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 58, DAG_INTERPRETER_EARLY_EXITS: 4, TOOLS_POST_APPLICATIONS: 44, TOOLS_POST_TIME: 2.8s, TOOLS_POST_CALL_APPLICATIONS: 42, TOOLS_POST_CALL_TIME: 2.4s, TOOLS_POST_RETURN_APPLICATIONS: 30, TOOLS_POST_RETURN_TIME: 2.7s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 114, TOOLS_QUANTIFIERELIM_TIME: 7.9s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.5s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 141, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 57, DOMAIN_JOIN_TIME: 0.3s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 58, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME: 0.6s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.6s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 30, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 1245, DAG_COMPRESSION_RETAINED_NODES: 158, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 74]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((q <= 0 && unknown-#length-unknown[3] == 12) && 1 <= y) && b <= 1) && c <= 1) && 11 == unknown-#length-unknown[2]) && 2 == unknown-#length-unknown[1]) && 1 <= c) && \valid[3] == 1) && #NULL <= 0) && 1 <= b) && p <= 1) && 1 <= a) && r <= 0) && k == 0) && x <= 1) && 0 <= q) && 1 <= x) && \valid[1] == 1) && y <= 1) && \valid[0] == 0) && \valid[2] == 1) && unknown-#memory_int-unknown[1][0] == 48) && 0 <= #NULL) && unknown-#memory_int-unknown[1][1] == 0) && a == x * p + y * r) && s == 1) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) || ((((((((((((((((((((((((k == 1 && unknown-#length-unknown[3] == 12) && b * d == v) && v <= b) && 11 == unknown-#length-unknown[2]) && 2 == unknown-#length-unknown[1]) && \valid[3] == 1) && b == x * q + y * s) && 0 <= c) && r == 0) && q == 0) && x <= 1) && \valid[1] == 1) && c < b) && \valid[0] == 0) && \valid[2] == 1) && #NULL == 0) && a == x) && unknown-#memory_int-unknown[1][0] == 48) && unknown-#memory_int-unknown[1][1] == 0) && a == x * p + y * r) && b <= x) && s == 1) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((unknown-#length-unknown[3] == 12 && b * d == v) && b == y) && c <= 1) && 11 == unknown-#length-unknown[2]) && 2 == unknown-#length-unknown[1]) && \valid[3] == 1) && b == v) && 1 <= b) && r == 0) && q == 0) && k == 0) && x <= 1) && 1 <= x) && b <= c) && \valid[1] == 1) && \valid[0] == 0) && \valid[2] == 1) && #NULL == 0) && a == x) && unknown-#memory_int-unknown[1][0] == 48) && unknown-#memory_int-unknown[1][1] == 0) && a == x * p + y * r) && s == 1) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((((((((((((((((unknown-#length-unknown[3] == 12 && 11 == unknown-#length-unknown[2]) && 2 == unknown-#length-unknown[1]) && \valid[3] == 1) && b == x * q + y * s) && 1 <= b) && r == 0) && q == 0) && x <= 1) && 1 <= x) && \valid[1] == 1) && y <= 1) && \valid[0] == 0) && \valid[2] == 1) && #NULL == 0) && a == x) && unknown-#memory_int-unknown[1][0] == 48) && unknown-#memory_int-unknown[1][1] == 0) && a == x * p + y * r) && s == 1) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) || (((((((((((((((((((((0 <= b && unknown-#length-unknown[3] == 12) && 1 <= y) && x * q + y * s + a == x * p + y * r) && 11 == unknown-#length-unknown[2]) && 2 == unknown-#length-unknown[1]) && \valid[3] == 1) && 0 <= c) && 2 * c < 1) && x <= 1) && 1 <= x) && \valid[1] == 1) && 2 * b < 1) && y <= 1) && \valid[0] == 0) && b < a) && \valid[2] == 1) && #NULL == 0) && unknown-#memory_int-unknown[1][0] == 48) && unknown-#memory_int-unknown[1][1] == 0) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) RESULT: Ultimate proved your program to be correct! [2021-11-20 23:58:20,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4129af06-3b59-4b63-bcb4-6c1691a0755a/bin/utaipan-TEXQjIfE4P/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 Writing output log to file Ultimate.log Result: TRUE