./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested3-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested3-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs --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 d20380c7a8af013b35f7d593b0456e6ffc5499d6 .......................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested3-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs --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 d20380c7a8af013b35f7d593b0456e6ffc5499d6 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:50:19,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:50:19,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:50:19,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:50:19,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:50:19,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:50:19,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:50:19,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:50:19,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:50:19,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:50:19,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:50:19,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:50:19,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:50:19,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:50:19,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:50:19,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:50:19,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:50:19,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:50:19,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:50:19,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:50:19,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:50:19,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:50:19,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:50:19,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:50:19,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:50:19,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:50:19,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:50:19,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:50:19,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:50:19,704 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:50:19,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:50:19,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:50:19,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:50:19,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:50:19,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:50:19,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:50:19,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:50:19,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:50:19,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:50:19,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:50:19,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:50:19,716 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:50:19,747 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:50:19,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:50:19,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:50:19,756 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:50:19,756 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:50:19,756 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:50:19,757 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:50:19,757 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:50:19,758 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:50:19,758 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:50:19,758 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:50:19,759 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:50:19,759 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:50:19,759 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:50:19,760 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:50:19,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:50:19,761 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:50:19,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:50:19,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:50:19,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:50:19,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:50:19,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:50:19,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:50:19,764 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:50:19,764 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:50:19,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:50:19,765 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:50:19,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:50:19,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:50:19,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:50:19,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:50:19,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:50:19,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:50:19,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:50:19,768 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:50:19,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:50:19,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:50:19,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:50:19,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:50:19,770 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_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d20380c7a8af013b35f7d593b0456e6ffc5499d6 [2021-10-16 02:50:20,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:50:20,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:50:20,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:50:20,121 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:50:20,122 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:50:20,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loops-crafted-1/nested3-1.c [2021-10-16 02:50:20,189 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/data/c521e7d8e/aefd42509292484cae32e6a32cec28b0/FLAG0e19170b3 [2021-10-16 02:50:20,737 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:50:20,738 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/sv-benchmarks/c/loops-crafted-1/nested3-1.c [2021-10-16 02:50:20,746 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/data/c521e7d8e/aefd42509292484cae32e6a32cec28b0/FLAG0e19170b3 [2021-10-16 02:50:21,082 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/data/c521e7d8e/aefd42509292484cae32e6a32cec28b0 [2021-10-16 02:50:21,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:50:21,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:50:21,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:50:21,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:50:21,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:50:21,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:50:21" (1/1) ... [2021-10-16 02:50:21,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cec3b97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:21, skipping insertion in model container [2021-10-16 02:50:21,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:50:21" (1/1) ... [2021-10-16 02:50:21,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:50:21,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:50:21,282 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2021-10-16 02:50:21,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:50:21,320 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:50:21,333 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2021-10-16 02:50:21,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:50:21,353 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:50:21,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:21 WrapperNode [2021-10-16 02:50:21,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:50:21,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:50:21,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:50:21,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:50:21,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:21" (1/1) ... [2021-10-16 02:50:21,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:21" (1/1) ... [2021-10-16 02:50:21,425 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:50:21,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:50:21,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:50:21,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:50:21,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:21" (1/1) ... [2021-10-16 02:50:21,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:21" (1/1) ... [2021-10-16 02:50:21,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:21" (1/1) ... [2021-10-16 02:50:21,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:21" (1/1) ... [2021-10-16 02:50:21,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:21" (1/1) ... [2021-10-16 02:50:21,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:21" (1/1) ... [2021-10-16 02:50:21,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:21" (1/1) ... [2021-10-16 02:50:21,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:50:21,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:50:21,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:50:21,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:50:21,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:21" (1/1) ... [2021-10-16 02:50:21,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:50:21,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:21,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:50:21,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:50:21,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:50:21,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:50:21,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:50:21,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:50:21,939 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:50:21,939 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-16 02:50:21,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:50:21 BoogieIcfgContainer [2021-10-16 02:50:21,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:50:21,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:50:21,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:50:21,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:50:21,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:50:21" (1/3) ... [2021-10-16 02:50:21,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184beccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:50:21, skipping insertion in model container [2021-10-16 02:50:21,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:21" (2/3) ... [2021-10-16 02:50:21,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184beccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:50:21, skipping insertion in model container [2021-10-16 02:50:21,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:50:21" (3/3) ... [2021-10-16 02:50:21,953 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2021-10-16 02:50:21,959 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:50:21,959 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-16 02:50:22,008 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:50:22,016 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, mConcurrency=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 [2021-10-16 02:50:22,017 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-16 02:50:22,032 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:22,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:50:22,037 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:22,038 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:50:22,039 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:22,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:22,046 INFO L82 PathProgramCache]: Analyzing trace with hash 3328135, now seen corresponding path program 1 times [2021-10-16 02:50:22,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:50:22,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844655730] [2021-10-16 02:50:22,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:22,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:50:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:22,387 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:50:22,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844655730] [2021-10-16 02:50:22,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844655730] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:22,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:22,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:50:22,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922631518] [2021-10-16 02:50:22,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:50:22,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:50:22,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:50:22,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:22,427 INFO L87 Difference]: Start difference. First operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:22,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:22,487 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2021-10-16 02:50:22,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:50:22,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-16 02:50:22,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:22,500 INFO L225 Difference]: With dead ends: 44 [2021-10-16 02:50:22,500 INFO L226 Difference]: Without dead ends: 26 [2021-10-16 02:50:22,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-16 02:50:22,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2021-10-16 02:50:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:22,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-10-16 02:50:22,553 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 4 [2021-10-16 02:50:22,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:22,554 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-16 02:50:22,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-10-16 02:50:22,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:50:22,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:22,556 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:50:22,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:50:22,558 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:22,563 INFO L82 PathProgramCache]: Analyzing trace with hash 101075770, now seen corresponding path program 1 times [2021-10-16 02:50:22,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:50:22,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508938968] [2021-10-16 02:50:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:22,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:50:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:22,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:50:22,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508938968] [2021-10-16 02:50:22,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508938968] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:22,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:22,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:50:22,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271660540] [2021-10-16 02:50:22,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:50:22,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:50:22,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:50:22,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:22,684 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:22,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:22,715 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-10-16 02:50:22,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:50:22,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-16 02:50:22,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:22,718 INFO L225 Difference]: With dead ends: 36 [2021-10-16 02:50:22,719 INFO L226 Difference]: Without dead ends: 22 [2021-10-16 02:50:22,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:22,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-16 02:50:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2021-10-16 02:50:22,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:22,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-16 02:50:22,729 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 5 [2021-10-16 02:50:22,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:22,729 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-16 02:50:22,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:22,731 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-16 02:50:22,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:50:22,732 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:22,732 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:50:22,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:50:22,734 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:22,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:22,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1163553408, now seen corresponding path program 1 times [2021-10-16 02:50:22,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:50:22,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329224048] [2021-10-16 02:50:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:22,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:50:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:22,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:50:22,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329224048] [2021-10-16 02:50:22,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329224048] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:22,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:22,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:50:22,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401683374] [2021-10-16 02:50:22,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:50:22,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:50:22,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:50:22,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:22,825 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:22,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:22,847 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-10-16 02:50:22,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:50:22,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:50:22,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:22,850 INFO L225 Difference]: With dead ends: 34 [2021-10-16 02:50:22,850 INFO L226 Difference]: Without dead ends: 19 [2021-10-16 02:50:22,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:22,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-16 02:50:22,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-10-16 02:50:22,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:22,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-10-16 02:50:22,862 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2021-10-16 02:50:22,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:22,863 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-16 02:50:22,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:22,863 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-10-16 02:50:22,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:50:22,865 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:22,865 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:22,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:50:22,866 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:22,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1712009681, now seen corresponding path program 1 times [2021-10-16 02:50:22,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:50:22,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451751780] [2021-10-16 02:50:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:22,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:50:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:23,026 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:50:23,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451751780] [2021-10-16 02:50:23,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451751780] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:50:23,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473660890] [2021-10-16 02:50:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:23,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:23,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:23,037 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:50:23,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:50:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:23,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:50:23,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:23,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:23,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:23,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473660890] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:23,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1666593464] [2021-10-16 02:50:23,321 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-16 02:50:23,321 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:50:23,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:50:23,332 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:50:23,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:50:23,363 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:50:23,375 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:50:23,377 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:50:23,378 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:50:23,379 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:50:23,380 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:50:23,380 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:50:23,385 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-16 02:50:23,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:50:23,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:50:23,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:50:23,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 02:50:23,441 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:50:23,443 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:50:23,445 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:50:23,446 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:50:23,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:50:23,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:50:23,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:50:23,511 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:50:23,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-16 02:50:23,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:50:23,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:128, output treesize:131 [2021-10-16 02:50:23,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:23,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:23,723 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_10| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:50:23,727 INFO L168 Benchmark]: Toolchain (without parser) took 2639.98 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 74.6 MB in the beginning and 74.8 MB in the end (delta: -224.3 kB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:50:23,727 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 98.6 MB. Free memory is still 70.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:50:23,728 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.04 ms. Allocated memory is still 98.6 MB. Free memory was 74.4 MB in the beginning and 73.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:50:23,729 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.76 ms. Allocated memory is still 98.6 MB. Free memory was 73.2 MB in the beginning and 71.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:50:23,729 INFO L168 Benchmark]: Boogie Preprocessor took 41.52 ms. Allocated memory is still 98.6 MB. Free memory was 71.4 MB in the beginning and 70.4 MB in the end (delta: 964.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:50:23,730 INFO L168 Benchmark]: RCFGBuilder took 474.43 ms. Allocated memory is still 98.6 MB. Free memory was 70.3 MB in the beginning and 58.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:50:23,731 INFO L168 Benchmark]: TraceAbstraction took 1781.03 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 57.9 MB in the beginning and 74.8 MB in the end (delta: -16.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:50:23,734 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 98.6 MB. Free memory is still 70.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 267.04 ms. Allocated memory is still 98.6 MB. Free memory was 74.4 MB in the beginning and 73.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 69.76 ms. Allocated memory is still 98.6 MB. Free memory was 73.2 MB in the beginning and 71.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.52 ms. Allocated memory is still 98.6 MB. Free memory was 71.4 MB in the beginning and 70.4 MB in the end (delta: 964.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 474.43 ms. Allocated memory is still 98.6 MB. Free memory was 70.3 MB in the beginning and 58.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1781.03 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 57.9 MB in the beginning and 74.8 MB in the end (delta: -16.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_10| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_10|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:50:23,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:50:26,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:50:26,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:50:26,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:50:26,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:50:26,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:50:26,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:50:26,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:50:26,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:50:26,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:50:26,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:50:26,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:50:26,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:50:26,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:50:26,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:50:26,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:50:26,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:50:26,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:50:26,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:50:26,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:50:26,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:50:26,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:50:26,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:50:26,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:50:26,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:50:26,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:50:26,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:50:26,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:50:26,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:50:26,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:50:26,536 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:50:26,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:50:26,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:50:26,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:50:26,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:50:26,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:50:26,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:50:26,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:50:26,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:50:26,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:50:26,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:50:26,571 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:50:26,623 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:50:26,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:50:26,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:50:26,625 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:50:26,626 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:50:26,626 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:50:26,626 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:50:26,626 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:50:26,627 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:50:26,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:50:26,630 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:50:26,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:50:26,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:50:26,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:50:26,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:50:26,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:50:26,631 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:50:26,631 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:50:26,631 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:50:26,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:50:26,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:50:26,632 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:50:26,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:50:26,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:50:26,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:50:26,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:50:26,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:50:26,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:50:26,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:50:26,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:50:26,634 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:50:26,635 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:26,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:50:26,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:50:26,636 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:50:26,636 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d20380c7a8af013b35f7d593b0456e6ffc5499d6 [2021-10-16 02:50:27,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:50:27,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:50:27,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:50:27,090 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:50:27,091 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:50:27,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loops-crafted-1/nested3-1.c [2021-10-16 02:50:27,191 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/data/da150519c/de70ab7616314016a33451b80554b958/FLAG19e01ccb2 [2021-10-16 02:50:27,780 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:50:27,781 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/sv-benchmarks/c/loops-crafted-1/nested3-1.c [2021-10-16 02:50:27,788 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/data/da150519c/de70ab7616314016a33451b80554b958/FLAG19e01ccb2 [2021-10-16 02:50:28,122 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/data/da150519c/de70ab7616314016a33451b80554b958 [2021-10-16 02:50:28,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:50:28,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:50:28,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:50:28,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:50:28,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:50:28,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:50:28" (1/1) ... [2021-10-16 02:50:28,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17bc2940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:28, skipping insertion in model container [2021-10-16 02:50:28,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:50:28" (1/1) ... [2021-10-16 02:50:28,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:50:28,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:50:28,281 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2021-10-16 02:50:28,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:50:28,314 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:50:28,328 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2021-10-16 02:50:28,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:50:28,346 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:50:28,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:28 WrapperNode [2021-10-16 02:50:28,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:50:28,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:50:28,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:50:28,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:50:28,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:28" (1/1) ... [2021-10-16 02:50:28,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:28" (1/1) ... [2021-10-16 02:50:28,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:50:28,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:50:28,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:50:28,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:50:28,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:28" (1/1) ... [2021-10-16 02:50:28,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:28" (1/1) ... [2021-10-16 02:50:28,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:28" (1/1) ... [2021-10-16 02:50:28,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:28" (1/1) ... [2021-10-16 02:50:28,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:28" (1/1) ... [2021-10-16 02:50:28,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:28" (1/1) ... [2021-10-16 02:50:28,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:28" (1/1) ... [2021-10-16 02:50:28,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:50:28,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:50:28,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:50:28,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:50:28,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:28" (1/1) ... [2021-10-16 02:50:28,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:50:28,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:28,497 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:50:28,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:50:28,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:50:28,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:50:28,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:50:28,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:50:28,766 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:50:28,767 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-16 02:50:28,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:50:28 BoogieIcfgContainer [2021-10-16 02:50:28,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:50:28,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:50:28,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:50:28,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:50:28,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:50:28" (1/3) ... [2021-10-16 02:50:28,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da20527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:50:28, skipping insertion in model container [2021-10-16 02:50:28,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:28" (2/3) ... [2021-10-16 02:50:28,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da20527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:50:28, skipping insertion in model container [2021-10-16 02:50:28,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:50:28" (3/3) ... [2021-10-16 02:50:28,779 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2021-10-16 02:50:28,785 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:50:28,785 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-16 02:50:28,838 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:50:28,845 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, mConcurrency=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 [2021-10-16 02:50:28,846 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-16 02:50:28,862 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 19 states have (on average 1.631578947368421) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:28,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:50:28,868 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:28,868 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:50:28,869 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:28,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:28,876 INFO L82 PathProgramCache]: Analyzing trace with hash 889681499, now seen corresponding path program 1 times [2021-10-16 02:50:28,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:28,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54155665] [2021-10-16 02:50:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:28,891 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:28,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:28,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:28,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:50:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:29,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:50:29,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:29,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:29,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:29,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54155665] [2021-10-16 02:50:29,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54155665] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:29,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:29,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:50:29,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544931562] [2021-10-16 02:50:29,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:50:29,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:29,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:50:29,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:50:29,161 INFO L87 Difference]: Start difference. First operand has 23 states, 19 states have (on average 1.631578947368421) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:29,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:29,207 INFO L93 Difference]: Finished difference Result 58 states and 84 transitions. [2021-10-16 02:50:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:50:29,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:50:29,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:29,219 INFO L225 Difference]: With dead ends: 58 [2021-10-16 02:50:29,220 INFO L226 Difference]: Without dead ends: 33 [2021-10-16 02:50:29,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:50:29,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-16 02:50:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-10-16 02:50:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-10-16 02:50:29,260 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 6 [2021-10-16 02:50:29,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:29,261 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-10-16 02:50:29,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:29,262 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-10-16 02:50:29,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:50:29,262 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:29,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:29,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:29,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:50:29,475 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:29,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1810811368, now seen corresponding path program 1 times [2021-10-16 02:50:29,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:29,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228541464] [2021-10-16 02:50:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:29,486 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:29,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:29,487 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:29,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:50:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:29,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:50:29,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:29,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:29,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:29,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228541464] [2021-10-16 02:50:29,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228541464] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:29,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:29,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:50:29,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480671357] [2021-10-16 02:50:29,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:50:29,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:29,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:50:29,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:50:29,671 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:29,710 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2021-10-16 02:50:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:50:29,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-16 02:50:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:29,713 INFO L225 Difference]: With dead ends: 64 [2021-10-16 02:50:29,716 INFO L226 Difference]: Without dead ends: 43 [2021-10-16 02:50:29,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:50:29,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-16 02:50:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-10-16 02:50:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-10-16 02:50:29,730 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 7 [2021-10-16 02:50:29,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:29,731 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-10-16 02:50:29,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:29,732 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-10-16 02:50:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:50:29,732 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:29,733 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:29,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:29,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:50:29,947 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:29,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:29,948 INFO L82 PathProgramCache]: Analyzing trace with hash 301781204, now seen corresponding path program 1 times [2021-10-16 02:50:29,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:29,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832179729] [2021-10-16 02:50:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:29,949 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:29,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:29,951 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:29,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:50:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:30,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:50:30,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:30,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:30,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:30,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832179729] [2021-10-16 02:50:30,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832179729] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:30,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:30,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:50:30,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203779766] [2021-10-16 02:50:30,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:50:30,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:30,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:50:30,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:50:30,109 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:30,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:30,145 INFO L93 Difference]: Finished difference Result 85 states and 112 transitions. [2021-10-16 02:50:30,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:50:30,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:50:30,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:30,154 INFO L225 Difference]: With dead ends: 85 [2021-10-16 02:50:30,154 INFO L226 Difference]: Without dead ends: 49 [2021-10-16 02:50:30,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:50:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-16 02:50:30,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-10-16 02:50:30,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:30,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-10-16 02:50:30,187 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 8 [2021-10-16 02:50:30,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:30,188 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-10-16 02:50:30,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:30,188 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-10-16 02:50:30,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:50:30,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:30,189 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:30,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:30,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:50:30,400 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:30,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:30,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1992746636, now seen corresponding path program 1 times [2021-10-16 02:50:30,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:30,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447586289] [2021-10-16 02:50:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:30,402 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:30,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:30,427 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:30,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:50:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:30,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:50:30,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:30,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:30,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:30,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447586289] [2021-10-16 02:50:30,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447586289] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:30,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1730362171] [2021-10-16 02:50:30,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:30,712 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:30,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:50:30,719 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:50:30,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-16 02:50:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:30,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:50:30,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:30,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:31,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1730362171] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:31,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921331861] [2021-10-16 02:50:31,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:31,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:31,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:31,079 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:50:31,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-16 02:50:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:31,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:50:31,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:31,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:31,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921331861] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:31,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:50:31,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 13 [2021-10-16 02:50:31,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013707645] [2021-10-16 02:50:31,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 02:50:31,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:31,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 02:50:31,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:50:31,343 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:31,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:31,782 INFO L93 Difference]: Finished difference Result 111 states and 150 transitions. [2021-10-16 02:50:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 02:50:31,783 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:50:31,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:31,784 INFO L225 Difference]: With dead ends: 111 [2021-10-16 02:50:31,785 INFO L226 Difference]: Without dead ends: 69 [2021-10-16 02:50:31,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 394.0ms TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-10-16 02:50:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-16 02:50:31,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-16 02:50:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:31,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2021-10-16 02:50:31,804 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 10 [2021-10-16 02:50:31,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:31,804 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2021-10-16 02:50:31,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:31,805 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2021-10-16 02:50:31,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:50:31,806 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:31,806 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:31,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:32,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:32,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-16 02:50:32,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:50:32,407 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:32,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:32,408 INFO L82 PathProgramCache]: Analyzing trace with hash -897381063, now seen corresponding path program 2 times [2021-10-16 02:50:32,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:32,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258621221] [2021-10-16 02:50:32,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:50:32,409 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:32,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:32,414 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:32,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:50:32,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:50:32,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:50:32,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:50:32,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:32,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:50:32,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:32,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258621221] [2021-10-16 02:50:32,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258621221] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:32,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1256754362] [2021-10-16 02:50:32,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:50:32,786 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:32,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:50:32,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:50:32,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-16 02:50:32,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:50:32,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:50:32,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:50:32,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:32,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:50:33,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1256754362] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:33,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013296784] [2021-10-16 02:50:33,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:50:33,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:33,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:33,071 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:50:33,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-16 02:50:33,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:50:33,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:50:33,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:50:33,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:33,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:50:33,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013296784] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:33,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:50:33,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 11, 7, 11, 7] total 16 [2021-10-16 02:50:33,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283516145] [2021-10-16 02:50:33,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 02:50:33,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:33,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 02:50:33,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:50:33,335 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:34,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:34,321 INFO L93 Difference]: Finished difference Result 267 states and 333 transitions. [2021-10-16 02:50:34,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-16 02:50:34,322 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-16 02:50:34,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:34,324 INFO L225 Difference]: With dead ends: 267 [2021-10-16 02:50:34,325 INFO L226 Difference]: Without dead ends: 210 [2021-10-16 02:50:34,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 599.4ms TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2021-10-16 02:50:34,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-10-16 02:50:34,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 93. [2021-10-16 02:50:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 92 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2021-10-16 02:50:34,373 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 15 [2021-10-16 02:50:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:34,373 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2021-10-16 02:50:34,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2021-10-16 02:50:34,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:50:34,375 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:34,375 INFO L512 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:34,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:34,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:34,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:34,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:34,977 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:34,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:34,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2047343788, now seen corresponding path program 3 times [2021-10-16 02:50:34,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:34,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809660975] [2021-10-16 02:50:34,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:50:34,978 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:34,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:34,980 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:34,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:50:35,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:50:35,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:50:35,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:50:35,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-16 02:50:35,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-16 02:50:35,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:35,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809660975] [2021-10-16 02:50:35,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809660975] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:35,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:35,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-16 02:50:35,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427572218] [2021-10-16 02:50:35,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:50:35,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:35,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:50:35,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:50:35,266 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:35,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:35,454 INFO L93 Difference]: Finished difference Result 93 states and 115 transitions. [2021-10-16 02:50:35,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:50:35,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 02:50:35,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:35,456 INFO L225 Difference]: With dead ends: 93 [2021-10-16 02:50:35,457 INFO L226 Difference]: Without dead ends: 91 [2021-10-16 02:50:35,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:50:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-16 02:50:35,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2021-10-16 02:50:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:35,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-10-16 02:50:35,484 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 16 [2021-10-16 02:50:35,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:35,485 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-10-16 02:50:35,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:35,485 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-10-16 02:50:35,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-16 02:50:35,486 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:35,487 INFO L512 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:35,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:35,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:50:35,699 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:35,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:35,700 INFO L82 PathProgramCache]: Analyzing trace with hash -438485240, now seen corresponding path program 1 times [2021-10-16 02:50:35,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:35,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609441861] [2021-10-16 02:50:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:35,701 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:35,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:35,706 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:35,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:50:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:35,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:50:35,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 83 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-16 02:50:35,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 83 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-16 02:50:36,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:36,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609441861] [2021-10-16 02:50:36,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609441861] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:36,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [696496765] [2021-10-16 02:50:36,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:36,281 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:36,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:50:36,283 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:50:36,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-16 02:50:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:36,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:50:36,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 85 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-16 02:50:36,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 85 proven. 30 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-10-16 02:50:36,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [696496765] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:36,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822289663] [2021-10-16 02:50:36,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:36,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:36,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:36,789 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:50:36,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-16 02:50:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:36,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:50:36,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:50:37,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:50:37,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822289663] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:37,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:50:37,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12, 7, 5, 6] total 32 [2021-10-16 02:50:37,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343476497] [2021-10-16 02:50:37,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-16 02:50:37,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:37,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-16 02:50:37,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2021-10-16 02:50:37,523 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:44,494 INFO L93 Difference]: Finished difference Result 365 states and 526 transitions. [2021-10-16 02:50:44,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-10-16 02:50:44,494 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-16 02:50:44,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:44,496 INFO L225 Difference]: With dead ends: 365 [2021-10-16 02:50:44,497 INFO L226 Difference]: Without dead ends: 307 [2021-10-16 02:50:44,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7575 ImplicationChecksByTransitivity, 6513.9ms TimeCoverageRelationStatistics Valid=2732, Invalid=20830, Unknown=0, NotChecked=0, Total=23562 [2021-10-16 02:50:44,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-10-16 02:50:44,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-10-16 02:50:44,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 305 states have (on average 1.0557377049180328) internal successors, (322), 306 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:44,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 322 transitions. [2021-10-16 02:50:44,618 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 322 transitions. Word has length 33 [2021-10-16 02:50:44,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:44,619 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 322 transitions. [2021-10-16 02:50:44,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:44,619 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 322 transitions. [2021-10-16 02:50:44,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-10-16 02:50:44,625 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:44,626 INFO L512 BasicCegarLoop]: trace histogram [114, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:44,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:44,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:45,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-16 02:50:45,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:50:45,232 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:45,233 INFO L82 PathProgramCache]: Analyzing trace with hash -329577836, now seen corresponding path program 2 times [2021-10-16 02:50:45,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:45,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870658848] [2021-10-16 02:50:45,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:50:45,234 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:45,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:45,237 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:45,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 02:50:45,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:50:45,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:50:45,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:50:45,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7206 backedges. 2006 proven. 190 refuted. 0 times theorem prover too weak. 5010 trivial. 0 not checked. [2021-10-16 02:50:46,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7206 backedges. 2006 proven. 190 refuted. 0 times theorem prover too weak. 5010 trivial. 0 not checked. [2021-10-16 02:50:47,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:47,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870658848] [2021-10-16 02:50:47,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870658848] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:47,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [25204814] [2021-10-16 02:50:47,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:50:47,312 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:47,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:50:47,313 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:50:47,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-16 02:50:48,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:50:48,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:50:48,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:50:48,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:48,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7206 backedges. 2006 proven. 190 refuted. 0 times theorem prover too weak. 5010 trivial. 0 not checked. [2021-10-16 02:50:48,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7206 backedges. 2006 proven. 190 refuted. 0 times theorem prover too weak. 5010 trivial. 0 not checked. [2021-10-16 02:50:48,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [25204814] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:48,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849154118] [2021-10-16 02:50:48,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:50:48,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:48,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:48,831 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:50:48,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-16 02:50:49,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:50:49,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:50:49,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:50:49,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7206 backedges. 0 proven. 6066 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2021-10-16 02:50:50,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7206 backedges. 2021 proven. 0 refuted. 0 times theorem prover too weak. 5185 trivial. 0 not checked. [2021-10-16 02:50:50,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849154118] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:50:50,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:50:50,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [22, 22, 22, 22, 9] total 53 [2021-10-16 02:50:50,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947384065] [2021-10-16 02:50:50,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:50:50,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:50,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:50:50,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=521, Invalid=2235, Unknown=0, NotChecked=0, Total=2756 [2021-10-16 02:50:50,939 INFO L87 Difference]: Start difference. First operand 307 states and 322 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:51,284 INFO L93 Difference]: Finished difference Result 307 states and 322 transitions. [2021-10-16 02:50:51,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:50:51,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-10-16 02:50:51,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:51,288 INFO L225 Difference]: With dead ends: 307 [2021-10-16 02:50:51,288 INFO L226 Difference]: Without dead ends: 305 [2021-10-16 02:50:51,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 849 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1682.4ms TimeCoverageRelationStatistics Valid=549, Invalid=2643, Unknown=0, NotChecked=0, Total=3192 [2021-10-16 02:50:51,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-10-16 02:50:51,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2021-10-16 02:50:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.049342105263158) internal successors, (319), 304 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 319 transitions. [2021-10-16 02:50:51,394 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 319 transitions. Word has length 151 [2021-10-16 02:50:51,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:51,395 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 319 transitions. [2021-10-16 02:50:51,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:51,395 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 319 transitions. [2021-10-16 02:50:51,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-10-16 02:50:51,401 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:51,401 INFO L512 BasicCegarLoop]: trace histogram [228, 12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:51,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:51,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-16 02:50:51,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:52,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:52,012 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:52,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:52,012 INFO L82 PathProgramCache]: Analyzing trace with hash 314864027, now seen corresponding path program 1 times [2021-10-16 02:50:52,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:52,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177651681] [2021-10-16 02:50:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:52,014 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:52,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:52,015 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:52,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 02:50:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:52,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:50:52,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 28975 backedges. 4415 proven. 190 refuted. 0 times theorem prover too weak. 24370 trivial. 0 not checked. [2021-10-16 02:50:53,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 28975 backedges. 4415 proven. 190 refuted. 0 times theorem prover too weak. 24370 trivial. 0 not checked. [2021-10-16 02:50:55,151 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:55,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177651681] [2021-10-16 02:50:55,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177651681] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:55,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1595457948] [2021-10-16 02:50:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:55,152 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:55,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:50:55,159 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:50:55,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-16 02:50:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:56,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:50:56,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 28975 backedges. 14561 proven. 6066 refuted. 0 times theorem prover too weak. 8348 trivial. 0 not checked. [2021-10-16 02:50:57,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 28975 backedges. 14561 proven. 3639 refuted. 0 times theorem prover too weak. 10775 trivial. 0 not checked. [2021-10-16 02:50:58,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1595457948] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:58,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70242857] [2021-10-16 02:50:58,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:58,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:58,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:58,245 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:50:58,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-16 02:50:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:59,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:50:59,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:51:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 28975 backedges. 14561 proven. 6066 refuted. 0 times theorem prover too weak. 8348 trivial. 0 not checked. [2021-10-16 02:51:00,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:51:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 28975 backedges. 14561 proven. 3639 refuted. 0 times theorem prover too weak. 10775 trivial. 0 not checked. [2021-10-16 02:51:00,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70242857] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:51:00,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:51:00,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 10, 5, 10, 5] total 52 [2021-10-16 02:51:00,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881206944] [2021-10-16 02:51:00,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-16 02:51:00,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:51:00,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-16 02:51:00,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=2144, Unknown=0, NotChecked=0, Total=2652 [2021-10-16 02:51:00,981 INFO L87 Difference]: Start difference. First operand 305 states and 319 transitions. Second operand has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:35,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:51:35,232 INFO L93 Difference]: Finished difference Result 1164 states and 1309 transitions. [2021-10-16 02:51:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 373 states. [2021-10-16 02:51:35,232 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2021-10-16 02:51:35,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:51:35,238 INFO L225 Difference]: With dead ends: 1164 [2021-10-16 02:51:35,239 INFO L226 Difference]: Without dead ends: 879 [2021-10-16 02:51:35,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2181 GetRequests, 1763 SyntacticMatches, 6 SemanticMatches, 412 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65668 ImplicationChecksByTransitivity, 32701.4ms TimeCoverageRelationStatistics Valid=17266, Invalid=153716, Unknown=0, NotChecked=0, Total=170982 [2021-10-16 02:51:35,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-10-16 02:51:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 689. [2021-10-16 02:51:35,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 1.0247093023255813) internal successors, (705), 688 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 705 transitions. [2021-10-16 02:51:35,480 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 705 transitions. Word has length 304 [2021-10-16 02:51:35,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:51:35,480 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 705 transitions. [2021-10-16 02:51:35,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:35,481 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 705 transitions. [2021-10-16 02:51:35,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2021-10-16 02:51:35,501 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:51:35,501 INFO L512 BasicCegarLoop]: trace histogram [602, 14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-16 02:51:35,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-16 02:51:35,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-16 02:51:35,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-16 02:51:36,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:51:36,107 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:51:36,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:51:36,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1033821403, now seen corresponding path program 2 times [2021-10-16 02:51:36,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:51:36,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843260747] [2021-10-16 02:51:36,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:51:36,110 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:51:36,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:51:36,112 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:51:36,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-16 02:51:37,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:51:37,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:51:37,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-16 02:51:37,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:51:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 189819 backedges. 25185 proven. 946 refuted. 0 times theorem prover too weak. 163688 trivial. 0 not checked. [2021-10-16 02:51:39,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:51:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 189819 backedges. 25185 proven. 946 refuted. 0 times theorem prover too weak. 163688 trivial. 0 not checked. [2021-10-16 02:51:44,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:51:44,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843260747] [2021-10-16 02:51:44,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843260747] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:51:44,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [716389993] [2021-10-16 02:51:44,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:51:44,083 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:51:44,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:51:44,084 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:51:44,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-16 02:51:47,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:51:47,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:51:47,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-16 02:51:47,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:51:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 189819 backedges. 25185 proven. 946 refuted. 0 times theorem prover too weak. 163688 trivial. 0 not checked. [2021-10-16 02:51:48,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:51:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 189819 backedges. 25185 proven. 946 refuted. 0 times theorem prover too weak. 163688 trivial. 0 not checked. [2021-10-16 02:51:50,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [716389993] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:51:50,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611455610] [2021-10-16 02:51:50,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:51:50,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:51:50,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:51:50,397 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:51:50,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-16 02:51:52,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:51:52,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:51:52,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:51:52,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:51:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 189819 backedges. 0 proven. 95081 refuted. 0 times theorem prover too weak. 94738 trivial. 0 not checked. [2021-10-16 02:51:54,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:51:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 189819 backedges. 95080 proven. 0 refuted. 0 times theorem prover too weak. 94739 trivial. 0 not checked. [2021-10-16 02:51:58,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611455610] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:51:58,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:51:58,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [46, 46, 46, 46, 5] total 97 [2021-10-16 02:51:58,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612376039] [2021-10-16 02:51:58,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:51:58,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:51:58,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:51:58,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2135, Invalid=7177, Unknown=0, NotChecked=0, Total=9312 [2021-10-16 02:51:58,031 INFO L87 Difference]: Start difference. First operand 689 states and 705 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:58,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:51:58,615 INFO L93 Difference]: Finished difference Result 689 states and 705 transitions. [2021-10-16 02:51:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:51:58,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 688 [2021-10-16 02:51:58,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:51:58,618 INFO L225 Difference]: With dead ends: 689 [2021-10-16 02:51:58,618 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:51:58,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4126 GetRequests, 4027 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 4664.5ms TimeCoverageRelationStatistics Valid=2159, Invalid=7941, Unknown=0, NotChecked=0, Total=10100 [2021-10-16 02:51:58,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:51:58,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:51:58,620 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) [2021-10-16 02:51:58,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:51:58,620 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 688 [2021-10-16 02:51:58,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:51:58,620 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:51:58,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:58,620 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:51:58,620 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:51:58,622 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:51:58,623 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:51:58,623 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:51:58,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:51:58,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-16 02:51:59,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-16 02:51:59,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:51:59,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:51:59,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:51:59,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:51:59,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:52:12,973 WARN L207 SmtUtils]: Spent 13.40 s on a formula simplification. DAG size of input: 1376 DAG size of output: 1234 [2021-10-16 02:52:12,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:52:12,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:52:12,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:52:13,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:52:25,757 WARN L207 SmtUtils]: Spent 12.17 s on a formula simplification. DAG size of input: 1179 DAG size of output: 30 [2021-10-16 02:52:26,182 INFO L853 garLoopResultBuilder]: At program point L6-5(lines 5 10) the Hoare annotation is: (let ((.cse0 (bvadd ULTIMATE.start_main_~y~0 (_ bv1 32)))) (and (bvult (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~z~0) (_ bv268435455 32)) (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (or (bvult (bvadd (_ bv2 32) ULTIMATE.start_main_~y~0) (_ bv268435455 32)) (not (bvult .cse0 (_ bv268435455 32)))) (not (bvult ULTIMATE.start_main_~z~0 (_ bv268435455 32))) (= (bvurem .cse0 (_ bv2 32)) (_ bv0 32)) (bvult ULTIMATE.start_main_~x~0 (_ bv268435455 32)))) [2021-10-16 02:52:26,182 INFO L857 garLoopResultBuilder]: For program point L6-6(lines 6 8) no Hoare annotation was computed. [2021-10-16 02:52:26,182 INFO L860 garLoopResultBuilder]: At program point L6-8(lines 5 10) the Hoare annotation is: true [2021-10-16 02:52:26,183 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-10-16 02:52:26,183 INFO L853 garLoopResultBuilder]: At program point L19-2(lines 19 33) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~y~0 (_ bv0 32)) (= ULTIMATE.start_main_~z~0 (_ bv0 32)) (= ULTIMATE.start_main_~x~0 (_ bv0 32))) (let ((.cse0 (bvadd ULTIMATE.start_main_~y~0 (_ bv1 32)))) (and (bvult (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~z~0) (_ bv268435455 32)) (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (or (bvult (bvadd (_ bv2 32) ULTIMATE.start_main_~y~0) (_ bv268435455 32)) (not (bvult .cse0 (_ bv268435455 32)))) (or (not (= (bvurem ULTIMATE.start_main_~x~0 (_ bv2 32)) (_ bv0 32))) (bvult ULTIMATE.start_main_~x~0 (_ bv268435455 32))) (not (bvult ULTIMATE.start_main_~z~0 (_ bv268435455 32))) (= (bvurem .cse0 (_ bv2 32)) (_ bv0 32))))) [2021-10-16 02:52:26,183 INFO L857 garLoopResultBuilder]: For program point L19-3(lines 19 33) no Hoare annotation was computed. [2021-10-16 02:52:26,183 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-16 02:52:26,183 INFO L857 garLoopResultBuilder]: For program point L7-1(line 7) no Hoare annotation was computed. [2021-10-16 02:52:26,183 INFO L857 garLoopResultBuilder]: For program point L7-2(line 7) no Hoare annotation was computed. [2021-10-16 02:52:26,183 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-16 02:52:26,183 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:52:26,183 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-16 02:52:26,184 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-10-16 02:52:26,184 INFO L853 garLoopResultBuilder]: At program point L24-2(lines 24 26) the Hoare annotation is: (let ((.cse2 (= ULTIMATE.start_main_~x~0 (_ bv0 32))) (.cse0 (bvult (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~z~0) (_ bv268435455 32))) (.cse6 (bvult ULTIMATE.start_main_~y~0 (_ bv268435455 32))) (.cse7 (exists ((ULTIMATE.start_main_~z~0 (_ BitVec 32))) (and (bvult (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~z~0) (_ bv268435455 32)) (= ULTIMATE.start___VERIFIER_assert_~cond (bvurem ULTIMATE.start_main_~z~0 (_ bv4 32))) (not (bvult ULTIMATE.start_main_~z~0 (_ bv268435455 32)))))) (.cse1 (= ULTIMATE.start_main_~y~0 (_ bv0 32))) (.cse5 (= ULTIMATE.start_main_~z~0 (_ bv0 32))) (.cse3 (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)))) (.cse4 (bvult ULTIMATE.start_main_~x~0 (_ bv268435455 32)))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse1 .cse3 .cse4) (and .cse1 .cse5 .cse2) (and .cse0 .cse6 .cse7 .cse4) (and .cse5 .cse6 .cse7 .cse4) (and .cse1 .cse5 .cse3 .cse4))) [2021-10-16 02:52:26,184 INFO L857 garLoopResultBuilder]: For program point L24-3(lines 24 26) no Hoare annotation was computed. [2021-10-16 02:52:26,184 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:52:26,184 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-10-16 02:52:26,184 INFO L853 garLoopResultBuilder]: At program point L22-2(lines 22 29) the Hoare annotation is: (let ((.cse0 (bvult (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~z~0) (_ bv268435455 32))) (.cse3 (= ULTIMATE.start_main_~y~0 (_ bv0 32))) (.cse1 (not (bvult ULTIMATE.start_main_~z~0 (_ bv268435455 32)))) (.cse2 (bvult ULTIMATE.start_main_~x~0 (_ bv268435455 32)))) (or (and .cse0 (or (bvult ULTIMATE.start_main_~y~0 (_ bv268435455 32)) (not (= (bvurem ULTIMATE.start_main_~y~0 (_ bv2 32)) (_ bv0 32)))) .cse1 (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv3 32)) .cse2) (and .cse3 (= ULTIMATE.start_main_~z~0 (_ bv0 32)) (= ULTIMATE.start_main_~x~0 (_ bv0 32))) (and .cse0 .cse3 (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) .cse1 .cse2))) [2021-10-16 02:52:26,184 INFO L857 garLoopResultBuilder]: For program point L22-3(lines 22 29) no Hoare annotation was computed. [2021-10-16 02:52:26,185 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-10-16 02:52:26,185 INFO L853 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: (and (bvult (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~z~0) (_ bv268435455 32)) (bvult ULTIMATE.start_main_~y~0 (_ bv268435455 32)) (not (bvult ULTIMATE.start_main_~z~0 (_ bv268435455 32))) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv3 32)) (bvult ULTIMATE.start_main_~x~0 (_ bv268435455 32))) [2021-10-16 02:52:26,185 INFO L857 garLoopResultBuilder]: For program point L6-3(lines 6 8) no Hoare annotation was computed. [2021-10-16 02:52:26,185 INFO L860 garLoopResultBuilder]: At program point L35(lines 12 37) the Hoare annotation is: true [2021-10-16 02:52:26,189 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:52:26,217 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,218 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,218 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,219 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,219 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,219 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,220 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,221 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,221 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,221 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,221 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,221 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:52:26 BoogieIcfgContainer [2021-10-16 02:52:26,225 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:52:26,226 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:52:26,226 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:52:26,226 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:52:26,227 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:50:28" (3/4) ... [2021-10-16 02:52:26,236 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:52:26,248 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-16 02:52:26,249 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-16 02:52:26,249 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:52:26,249 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:52:26,293 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && y == 0bv32) && x == 0bv32) || (((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && y == 0bv32) && !(cond == 0bv32)) && ~bvult32(x, 268435455bv32))) || ((y == 0bv32 && z == 0bv32) && x == 0bv32)) || (((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && ~bvult32(y, 268435455bv32)) && (\exists ULTIMATE.start_main_~z~0 : bv32 :: (~bvult32(~bvadd64(4294967295bv32, ULTIMATE.start_main_~z~0), 268435455bv32) && cond == ~bvurem32(ULTIMATE.start_main_~z~0, 4bv32)) && !~bvult32(ULTIMATE.start_main_~z~0, 268435455bv32))) && ~bvult32(x, 268435455bv32))) || (((z == 0bv32 && ~bvult32(y, 268435455bv32)) && (\exists ULTIMATE.start_main_~z~0 : bv32 :: (~bvult32(~bvadd64(4294967295bv32, ULTIMATE.start_main_~z~0), 268435455bv32) && cond == ~bvurem32(ULTIMATE.start_main_~z~0, 4bv32)) && !~bvult32(ULTIMATE.start_main_~z~0, 268435455bv32))) && ~bvult32(x, 268435455bv32))) || (((y == 0bv32 && z == 0bv32) && !(cond == 0bv32)) && ~bvult32(x, 268435455bv32)) [2021-10-16 02:52:26,308 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:52:26,308 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:52:26,310 INFO L168 Benchmark]: Toolchain (without parser) took 118182.79 ms. Allocated memory was 65.0 MB in the beginning and 2.7 GB in the end (delta: 2.6 GB). Free memory was 44.7 MB in the beginning and 2.3 GB in the end (delta: -2.3 GB). Peak memory consumption was 349.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:52:26,310 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 65.0 MB. Free memory is still 45.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:52:26,311 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.88 ms. Allocated memory is still 65.0 MB. Free memory was 44.4 MB in the beginning and 34.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:52:26,312 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.65 ms. Allocated memory is still 65.0 MB. Free memory was 34.6 MB in the beginning and 48.0 MB in the end (delta: -13.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:52:26,312 INFO L168 Benchmark]: Boogie Preprocessor took 34.56 ms. Allocated memory is still 65.0 MB. Free memory was 48.0 MB in the beginning and 46.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:52:26,314 INFO L168 Benchmark]: RCFGBuilder took 311.51 ms. Allocated memory is still 65.0 MB. Free memory was 46.6 MB in the beginning and 36.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:52:26,315 INFO L168 Benchmark]: TraceAbstraction took 117454.25 ms. Allocated memory was 65.0 MB in the beginning and 2.7 GB in the end (delta: 2.6 GB). Free memory was 35.9 MB in the beginning and 2.3 GB in the end (delta: -2.3 GB). Peak memory consumption was 939.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:52:26,315 INFO L168 Benchmark]: Witness Printer took 82.57 ms. Allocated memory is still 2.7 GB. Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:52:26,318 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 65.0 MB. Free memory is still 45.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 219.88 ms. Allocated memory is still 65.0 MB. Free memory was 44.4 MB in the beginning and 34.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 73.65 ms. Allocated memory is still 65.0 MB. Free memory was 34.6 MB in the beginning and 48.0 MB in the end (delta: -13.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.56 ms. Allocated memory is still 65.0 MB. Free memory was 48.0 MB in the beginning and 46.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 311.51 ms. Allocated memory is still 65.0 MB. Free memory was 46.6 MB in the beginning and 36.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 117454.25 ms. Allocated memory was 65.0 MB in the beginning and 2.7 GB in the end (delta: 2.6 GB). Free memory was 35.9 MB in the beginning and 2.3 GB in the end (delta: -2.3 GB). Peak memory consumption was 939.7 MB. Max. memory is 16.1 GB. * Witness Printer took 82.57 ms. Allocated memory is still 2.7 GB. Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 7]: 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 1 procedures, 23 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 117352.6ms, OverallIterations: 10, TraceHistogramMax: 602, EmptinessCheckTime: 46.6ms, AutomataDifference: 43992.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 26954.0ms, InitialAbstractionConstructionTime: 11.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 240 SDtfs, 473 SDslu, 1513 SDs, 0 SdLazy, 6254 SolverSat, 934 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3597.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7780 GetRequests, 6970 SyntacticMatches, 11 SemanticMatches, 799 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74210 ImplicationChecksByTransitivity, 46737.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=689occurred in iteration=9, InterpolantAutomatonStates: 589, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 587.8ms AutomataMinimizationTime, 10 MinimizatonAttempts, 333 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 660 NumberOfFragments, 275 HoareAnnotationTreeSize, 7 FomulaSimplifications, 130294 FormulaSimplificationTreeSizeReduction, 13816.1ms HoareSimplificationTime, 7 FomulaSimplificationsInter, 165495 FormulaSimplificationTreeSizeReductionInter, 13109.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 623.3ms SsaConstructionTime, 4361.8ms SatisfiabilityAnalysisTime, 28855.6ms InterpolantComputationTime, 3640 NumberOfCodeBlocks, 3634 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 7236 ConstructedInterpolants, 1 QuantifiedInterpolants, 17342 SizeOfPredicates, 33 NumberOfNonLiveVariables, 7322 ConjunctsInSsa, 283 ConjunctsInUnsatCore, 44 InterpolantComputations, 10 PerfectInterpolantSequences, 1231245/1357212 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: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: ((y == 0bv32 && z == 0bv32) && x == 0bv32) || (((((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && !(cond == 0bv32)) && (~bvult32(~bvadd64(2bv32, y), 268435455bv32) || !~bvult32(~bvadd64(y, 1bv32), 268435455bv32))) && (!(~bvurem32(x, 2bv32) == 0bv32) || ~bvult32(x, 268435455bv32))) && !~bvult32(z, 268435455bv32)) && ~bvurem32(~bvadd64(y, 1bv32), 2bv32) == 0bv32) - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: (((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && ~bvult32(y, 268435455bv32)) && !~bvult32(z, 268435455bv32)) && cond == 3bv32) && ~bvult32(x, 268435455bv32) - InvariantResult [Line: 24]: Loop Invariant [2021-10-16 02:52:26,330 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,330 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,330 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,330 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,330 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,331 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,332 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,332 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,332 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,332 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,332 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-16 02:52:26,333 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] Derived loop invariant: ((((((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && y == 0bv32) && x == 0bv32) || (((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && y == 0bv32) && !(cond == 0bv32)) && ~bvult32(x, 268435455bv32))) || ((y == 0bv32 && z == 0bv32) && x == 0bv32)) || (((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && ~bvult32(y, 268435455bv32)) && (\exists ULTIMATE.start_main_~z~0 : bv32 :: (~bvult32(~bvadd64(4294967295bv32, ULTIMATE.start_main_~z~0), 268435455bv32) && cond == ~bvurem32(ULTIMATE.start_main_~z~0, 4bv32)) && !~bvult32(ULTIMATE.start_main_~z~0, 268435455bv32))) && ~bvult32(x, 268435455bv32))) || (((z == 0bv32 && ~bvult32(y, 268435455bv32)) && (\exists ULTIMATE.start_main_~z~0 : bv32 :: (~bvult32(~bvadd64(4294967295bv32, ULTIMATE.start_main_~z~0), 268435455bv32) && cond == ~bvurem32(ULTIMATE.start_main_~z~0, 4bv32)) && !~bvult32(ULTIMATE.start_main_~z~0, 268435455bv32))) && ~bvult32(x, 268435455bv32))) || (((y == 0bv32 && z == 0bv32) && !(cond == 0bv32)) && ~bvult32(x, 268435455bv32)) - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: ((((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && !(cond == 0bv32)) && (~bvult32(~bvadd64(2bv32, y), 268435455bv32) || !~bvult32(~bvadd64(y, 1bv32), 268435455bv32))) && !~bvult32(z, 268435455bv32)) && ~bvurem32(~bvadd64(y, 1bv32), 2bv32) == 0bv32) && ~bvult32(x, 268435455bv32) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && (~bvult32(y, 268435455bv32) || !(~bvurem32(y, 2bv32) == 0bv32))) && !~bvult32(z, 268435455bv32)) && cond == 3bv32) && ~bvult32(x, 268435455bv32)) || ((y == 0bv32 && z == 0bv32) && x == 0bv32)) || ((((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && y == 0bv32) && !(cond == 0bv32)) && !~bvult32(z, 268435455bv32)) && ~bvult32(x, 268435455bv32)) - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-16 02:52:26,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbeb30a-7e30-40ce-ac3c-d74b1f8f4b17/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...