./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-industry-pattern/nested-3.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_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/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_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-industry-pattern/nested-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/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_ce851844-f3cf-4498-bd4a-7649541f2f16/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 ac430eaa5f6b4fef781eabca2fa59ab829e38729 ......................................................................................................................................................................................................................................................................................................................................................... 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_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/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_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-industry-pattern/nested-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/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_ce851844-f3cf-4498-bd4a-7649541f2f16/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 ac430eaa5f6b4fef781eabca2fa59ab829e38729 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 02:43:25,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:43:25,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:43:25,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:43:25,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:43:25,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:43:25,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:43:25,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:43:25,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:43:25,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:43:25,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:43:25,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:43:25,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:43:25,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:43:25,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:43:25,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:43:25,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:43:25,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:43:25,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:43:25,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:43:25,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:43:25,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:43:25,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:43:25,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:43:25,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:43:25,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:43:25,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:43:25,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:43:25,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:43:25,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:43:25,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:43:25,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:43:25,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:43:25,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:43:25,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:43:25,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:43:25,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:43:25,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:43:25,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:43:25,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:43:25,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:43:25,679 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:43:25,710 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:43:25,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:43:25,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:43:25,712 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:43:25,713 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:43:25,713 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:43:25,713 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:43:25,713 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:43:25,714 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:43:25,714 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:43:25,714 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:43:25,714 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:43:25,715 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:43:25,715 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:43:25,715 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:43:25,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:43:25,716 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:43:25,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:43:25,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:43:25,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:43:25,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:43:25,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:43:25,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:43:25,718 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:43:25,719 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:43:25,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:43:25,719 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:43:25,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:43:25,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:43:25,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:43:25,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:43:25,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:43:25,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:43:25,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:43:25,721 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:43:25,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:43:25,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:43:25,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:43:25,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:43:25,723 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_ce851844-f3cf-4498-bd4a-7649541f2f16/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac430eaa5f6b4fef781eabca2fa59ab829e38729 [2021-10-16 02:43:25,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:43:26,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:43:26,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:43:26,025 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:43:26,026 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:43:26,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-industry-pattern/nested-3.c [2021-10-16 02:43:26,132 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/data/da03e40be/e96c41fe3f284107a703416575e3c502/FLAG2e2104189 [2021-10-16 02:43:26,744 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:43:26,744 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/sv-benchmarks/c/loop-industry-pattern/nested-3.c [2021-10-16 02:43:26,756 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/data/da03e40be/e96c41fe3f284107a703416575e3c502/FLAG2e2104189 [2021-10-16 02:43:27,106 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/data/da03e40be/e96c41fe3f284107a703416575e3c502 [2021-10-16 02:43:27,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:43:27,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:43:27,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:43:27,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:43:27,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:43:27,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:43:27" (1/1) ... [2021-10-16 02:43:27,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@385f9533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:27, skipping insertion in model container [2021-10-16 02:43:27,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:43:27" (1/1) ... [2021-10-16 02:43:27,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:43:27,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:43:27,333 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_ce851844-f3cf-4498-bd4a-7649541f2f16/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2021-10-16 02:43:27,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:43:27,356 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:43:27,370 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_ce851844-f3cf-4498-bd4a-7649541f2f16/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2021-10-16 02:43:27,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:43:27,390 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:43:27,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:27 WrapperNode [2021-10-16 02:43:27,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:43:27,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:43:27,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:43:27,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:43:27,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:27" (1/1) ... [2021-10-16 02:43:27,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:27" (1/1) ... [2021-10-16 02:43:27,428 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:43:27,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:43:27,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:43:27,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:43:27,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:27" (1/1) ... [2021-10-16 02:43:27,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:27" (1/1) ... [2021-10-16 02:43:27,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:27" (1/1) ... [2021-10-16 02:43:27,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:27" (1/1) ... [2021-10-16 02:43:27,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:27" (1/1) ... [2021-10-16 02:43:27,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:27" (1/1) ... [2021-10-16 02:43:27,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:27" (1/1) ... [2021-10-16 02:43:27,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:43:27,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:43:27,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:43:27,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:43:27,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:27" (1/1) ... [2021-10-16 02:43:27,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:43:27,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:43:27,515 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:43:27,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:43:27,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:43:27,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:43:27,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:43:27,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:43:28,049 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:43:28,049 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-16 02:43:28,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:43:28 BoogieIcfgContainer [2021-10-16 02:43:28,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:43:28,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:43:28,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:43:28,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:43:28,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:43:27" (1/3) ... [2021-10-16 02:43:28,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f55673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:43:28, skipping insertion in model container [2021-10-16 02:43:28,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:27" (2/3) ... [2021-10-16 02:43:28,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f55673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:43:28, skipping insertion in model container [2021-10-16 02:43:28,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:43:28" (3/3) ... [2021-10-16 02:43:28,067 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.c [2021-10-16 02:43:28,074 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:43:28,075 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:43:28,146 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:43:28,155 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 02:43:28,156 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:43:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:43:28,180 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:28,181 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:43:28,181 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:43:28,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:28,196 INFO L82 PathProgramCache]: Analyzing trace with hash 82586899, now seen corresponding path program 1 times [2021-10-16 02:43:28,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:43:28,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115535759] [2021-10-16 02:43:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:28,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:43:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:28,500 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 02:43:28,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:43:28,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115535759] [2021-10-16 02:43:28,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115535759] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:43:28,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:43:28,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:43:28,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711107514] [2021-10-16 02:43:28,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:43:28,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:43:28,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:43:28,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:43:28,548 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 02:43:28,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:43:28,591 INFO L93 Difference]: Finished difference Result 14 states and 21 transitions. [2021-10-16 02:43:28,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:43:28,593 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 02:43:28,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:43:28,602 INFO L225 Difference]: With dead ends: 14 [2021-10-16 02:43:28,602 INFO L226 Difference]: Without dead ends: 8 [2021-10-16 02:43:28,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:43:28,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-16 02:43:28,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2021-10-16 02:43:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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 02:43:28,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2021-10-16 02:43:28,638 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2021-10-16 02:43:28,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:43:28,638 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-10-16 02:43:28,639 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 02:43:28,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2021-10-16 02:43:28,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:43:28,640 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:28,640 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:43:28,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:43:28,641 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:43:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:28,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1734662927, now seen corresponding path program 1 times [2021-10-16 02:43:28,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:43:28,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50477256] [2021-10-16 02:43:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:28,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:43:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:28,734 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 02:43:28,735 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:43:28,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50477256] [2021-10-16 02:43:28,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50477256] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:43:28,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375149105] [2021-10-16 02:43:28,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:28,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:43:28,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:43:28,741 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:43:28,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:43:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:28,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:43:28,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:28,890 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 02:43:28,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:28,929 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 02:43:28,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375149105] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:28,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [273698869] [2021-10-16 02:43:28,954 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-16 02:43:28,954 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:43:28,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:43:28,967 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:43:28,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:43:29,003 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:43:29,008 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:43:29,009 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:43:29,010 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:43:29,015 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:43:29,016 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:43:29,017 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:43:29,023 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-16 02:43:29,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:43:29,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:43:29,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:43:29,138 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-16 02:43:29,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-16 02:43:29,142 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:43:29,149 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:43:29,151 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:43:29,155 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:43:29,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:43:29,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:43:29,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:43:29,237 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:43:29,241 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120 [2021-10-16 02:43:29,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:43:29,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:136, output treesize:120 [2021-10-16 02:43:29,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-16 02:43:29,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:43:29,458 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_9| 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 02:43:29,462 INFO L168 Benchmark]: Toolchain (without parser) took 2350.46 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 64.0 MB in the beginning and 68.9 MB in the end (delta: -4.9 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:29,463 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 96.5 MB. Free memory is still 51.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:43:29,464 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.03 ms. Allocated memory is still 96.5 MB. Free memory was 63.8 MB in the beginning and 72.7 MB in the end (delta: -8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:29,464 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.09 ms. Allocated memory is still 96.5 MB. Free memory was 72.7 MB in the beginning and 71.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:29,465 INFO L168 Benchmark]: Boogie Preprocessor took 23.30 ms. Allocated memory is still 96.5 MB. Free memory was 71.2 MB in the beginning and 70.2 MB in the end (delta: 993.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:43:29,466 INFO L168 Benchmark]: RCFGBuilder took 599.88 ms. Allocated memory is still 96.5 MB. Free memory was 70.2 MB in the beginning and 57.7 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:29,468 INFO L168 Benchmark]: TraceAbstraction took 1406.71 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 57.2 MB in the beginning and 68.9 MB in the end (delta: -11.7 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:29,472 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 96.5 MB. Free memory is still 51.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 278.03 ms. Allocated memory is still 96.5 MB. Free memory was 63.8 MB in the beginning and 72.7 MB in the end (delta: -8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.09 ms. Allocated memory is still 96.5 MB. Free memory was 72.7 MB in the beginning and 71.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.30 ms. Allocated memory is still 96.5 MB. Free memory was 71.2 MB in the beginning and 70.2 MB in the end (delta: 993.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 599.88 ms. Allocated memory is still 96.5 MB. Free memory was 70.2 MB in the beginning and 57.7 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1406.71 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 57.2 MB in the beginning and 68.9 MB in the end (delta: -11.7 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_9| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_9|: 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 02:43:29,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:43:32,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:43:32,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:43:32,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:43:32,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:43:32,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:43:32,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:43:32,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:43:32,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:43:32,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:43:32,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:43:32,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:43:32,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:43:32,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:43:32,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:43:32,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:43:32,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:43:32,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:43:32,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:43:32,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:43:32,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:43:32,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:43:32,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:43:32,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:43:32,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:43:32,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:43:32,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:43:32,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:43:32,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:43:32,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:43:32,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:43:32,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:43:32,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:43:32,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:43:32,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:43:32,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:43:32,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:43:32,367 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:43:32,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:43:32,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:43:32,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:43:32,372 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:43:32,423 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:43:32,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:43:32,426 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:43:32,426 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:43:32,426 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:43:32,427 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:43:32,427 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:43:32,427 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:43:32,428 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:43:32,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:43:32,431 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:43:32,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:43:32,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:43:32,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:43:32,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:43:32,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:43:32,433 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:43:32,433 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:43:32,433 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:43:32,434 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:43:32,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:43:32,434 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:43:32,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:43:32,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:43:32,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:43:32,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:43:32,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:43:32,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:43:32,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:43:32,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:43:32,437 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:43:32,437 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:43:32,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:43:32,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:43:32,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:43:32,439 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_ce851844-f3cf-4498-bd4a-7649541f2f16/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac430eaa5f6b4fef781eabca2fa59ab829e38729 [2021-10-16 02:43:32,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:43:32,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:43:32,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:43:32,930 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:43:32,931 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:43:32,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-industry-pattern/nested-3.c [2021-10-16 02:43:33,001 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/data/fee04e402/44bd9c7f0c344148b9ec4bc1d249a7cf/FLAGdd4411420 [2021-10-16 02:43:33,576 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:43:33,576 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/sv-benchmarks/c/loop-industry-pattern/nested-3.c [2021-10-16 02:43:33,584 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/data/fee04e402/44bd9c7f0c344148b9ec4bc1d249a7cf/FLAGdd4411420 [2021-10-16 02:43:33,932 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/data/fee04e402/44bd9c7f0c344148b9ec4bc1d249a7cf [2021-10-16 02:43:33,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:43:33,935 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:43:33,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:43:33,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:43:33,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:43:33,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:43:33" (1/1) ... [2021-10-16 02:43:33,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a2045b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:33, skipping insertion in model container [2021-10-16 02:43:33,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:43:33" (1/1) ... [2021-10-16 02:43:33,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:43:33,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:43:34,148 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_ce851844-f3cf-4498-bd4a-7649541f2f16/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2021-10-16 02:43:34,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:43:34,202 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:43:34,220 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_ce851844-f3cf-4498-bd4a-7649541f2f16/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2021-10-16 02:43:34,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:43:34,250 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:43:34,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:34 WrapperNode [2021-10-16 02:43:34,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:43:34,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:43:34,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:43:34,254 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:43:34,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:34" (1/1) ... [2021-10-16 02:43:34,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:34" (1/1) ... [2021-10-16 02:43:34,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:43:34,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:43:34,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:43:34,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:43:34,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:34" (1/1) ... [2021-10-16 02:43:34,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:34" (1/1) ... [2021-10-16 02:43:34,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:34" (1/1) ... [2021-10-16 02:43:34,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:34" (1/1) ... [2021-10-16 02:43:34,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:34" (1/1) ... [2021-10-16 02:43:34,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:34" (1/1) ... [2021-10-16 02:43:34,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:34" (1/1) ... [2021-10-16 02:43:34,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:43:34,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:43:34,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:43:34,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:43:34,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:34" (1/1) ... [2021-10-16 02:43:34,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:43:34,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:43:34,383 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:43:34,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:43:34,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:43:34,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:43:34,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:43:34,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:43:34,767 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:43:34,770 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-16 02:43:34,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:43:34 BoogieIcfgContainer [2021-10-16 02:43:34,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:43:34,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:43:34,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:43:34,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:43:34,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:43:33" (1/3) ... [2021-10-16 02:43:34,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5108f0b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:43:34, skipping insertion in model container [2021-10-16 02:43:34,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:43:34" (2/3) ... [2021-10-16 02:43:34,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5108f0b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:43:34, skipping insertion in model container [2021-10-16 02:43:34,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:43:34" (3/3) ... [2021-10-16 02:43:34,784 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.c [2021-10-16 02:43:34,791 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:43:34,791 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:43:34,864 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:43:34,876 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 02:43:34,877 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:43:34,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 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 02:43:34,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:43:34,917 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:34,922 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:43:34,923 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:43:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:34,932 INFO L82 PathProgramCache]: Analyzing trace with hash 684167869, now seen corresponding path program 1 times [2021-10-16 02:43:34,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:43:34,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471652636] [2021-10-16 02:43:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:34,950 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:43:34,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:43:34,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:43:34,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:43:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:35,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:43:35,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:35,210 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 02:43:35,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:35,252 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 02:43:35,253 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:43:35,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471652636] [2021-10-16 02:43:35,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471652636] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:43:35,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:43:35,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:43:35,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337726012] [2021-10-16 02:43:35,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:43:35,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:43:35,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:43:35,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:43:35,280 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 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 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:43:35,343 INFO L93 Difference]: Finished difference Result 30 states and 52 transitions. [2021-10-16 02:43:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:43:35,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-16 02:43:35,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:43:35,361 INFO L225 Difference]: With dead ends: 30 [2021-10-16 02:43:35,361 INFO L226 Difference]: Without dead ends: 17 [2021-10-16 02:43:35,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:43:35,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-16 02:43:35,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-10-16 02:43:35,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 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 02:43:35,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-10-16 02:43:35,397 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 9 [2021-10-16 02:43:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:43:35,399 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-10-16 02:43:35,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:35,402 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2021-10-16 02:43:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:43:35,403 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:35,403 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:43:35,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-16 02:43:35,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:43:35,614 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:43:35,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:35,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2128752989, now seen corresponding path program 1 times [2021-10-16 02:43:35,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:43:35,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393748263] [2021-10-16 02:43:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:35,617 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:43:35,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:43:35,618 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:43:35,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:43:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:35,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:43:35,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:35,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:35,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:43:35,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393748263] [2021-10-16 02:43:35,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393748263] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:43:35,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:43:35,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-10-16 02:43:35,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866001820] [2021-10-16 02:43:35,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:43:35,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:43:35,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:43:35,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:43:35,948 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 02:43:36,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:43:36,091 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2021-10-16 02:43:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:43:36,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 02:43:36,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:43:36,097 INFO L225 Difference]: With dead ends: 53 [2021-10-16 02:43:36,098 INFO L226 Difference]: Without dead ends: 39 [2021-10-16 02:43:36,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:43:36,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-16 02:43:36,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2021-10-16 02:43:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-10-16 02:43:36,116 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 15 [2021-10-16 02:43:36,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:43:36,120 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-10-16 02:43:36,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 02:43:36,122 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-10-16 02:43:36,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:43:36,123 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:36,125 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:43:36,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:36,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:43:36,338 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:43:36,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:36,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1319465945, now seen corresponding path program 1 times [2021-10-16 02:43:36,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:43:36,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275912633] [2021-10-16 02:43:36,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:36,340 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:43:36,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:43:36,352 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:43:36,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:43:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:36,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:43:36,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:36,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:36,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:43:36,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275912633] [2021-10-16 02:43:36,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275912633] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:36,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1961499499] [2021-10-16 02:43:36,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:36,648 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:43:36,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:43:36,651 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:43:36,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-16 02:43:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:36,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:43:36,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:36,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:37,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1961499499] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:37,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295227693] [2021-10-16 02:43:37,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:37,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:43:37,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:43:37,075 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:43:37,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-16 02:43:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:37,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:43:37,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:37,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:37,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295227693] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:37,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:43:37,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 6, 5] total 14 [2021-10-16 02:43:37,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174112887] [2021-10-16 02:43:37,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 02:43:37,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:43:37,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 02:43:37,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:43:37,328 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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 02:43:38,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:43:38,513 INFO L93 Difference]: Finished difference Result 98 states and 130 transitions. [2021-10-16 02:43:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-16 02:43:38,514 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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 02:43:38,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:43:38,516 INFO L225 Difference]: With dead ends: 98 [2021-10-16 02:43:38,517 INFO L226 Difference]: Without dead ends: 77 [2021-10-16 02:43:38,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 901.3ms TimeCoverageRelationStatistics Valid=321, Invalid=1011, Unknown=0, NotChecked=0, Total=1332 [2021-10-16 02:43:38,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-16 02:43:38,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2021-10-16 02:43:38,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 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 02:43:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-10-16 02:43:38,542 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 15 [2021-10-16 02:43:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:43:38,542 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-10-16 02:43:38,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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 02:43:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-10-16 02:43:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 02:43:38,551 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:38,552 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:43:38,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:38,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-10-16 02:43:39,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:39,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:43:39,164 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:43:39,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:39,165 INFO L82 PathProgramCache]: Analyzing trace with hash -820883237, now seen corresponding path program 2 times [2021-10-16 02:43:39,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:43:39,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166520953] [2021-10-16 02:43:39,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:43:39,166 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:43:39,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:43:39,168 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:43:39,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:43:39,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:43:39,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:43:39,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:43:39,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-16 02:43:39,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-16 02:43:39,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:43:39,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166520953] [2021-10-16 02:43:39,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166520953] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:39,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [554058739] [2021-10-16 02:43:39,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:43:39,551 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:43:39,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:43:39,554 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:43:39,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-16 02:43:39,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:43:39,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:43:39,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:43:39,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:40,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:40,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [554058739] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:40,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244005756] [2021-10-16 02:43:40,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:43:40,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:43:40,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:43:40,228 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:43:40,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-16 02:43:40,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:43:40,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:43:40,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:43:40,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:40,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:40,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244005756] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:40,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:43:40,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9, 8, 9, 8] total 20 [2021-10-16 02:43:40,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889822670] [2021-10-16 02:43:40,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-16 02:43:40,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:43:40,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-16 02:43:40,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:43:40,698 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:43,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:43:43,253 INFO L93 Difference]: Finished difference Result 329 states and 413 transitions. [2021-10-16 02:43:43,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-16 02:43:43,254 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-16 02:43:43,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:43:43,257 INFO L225 Difference]: With dead ends: 329 [2021-10-16 02:43:43,258 INFO L226 Difference]: Without dead ends: 278 [2021-10-16 02:43:43,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1510.0ms TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2021-10-16 02:43:43,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-16 02:43:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 171. [2021-10-16 02:43:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.223529411764706) internal successors, (208), 170 states have internal predecessors, (208), 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 02:43:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 208 transitions. [2021-10-16 02:43:43,289 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 208 transitions. Word has length 27 [2021-10-16 02:43:43,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:43:43,290 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 208 transitions. [2021-10-16 02:43:43,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:43,290 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 208 transitions. [2021-10-16 02:43:43,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 02:43:43,292 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:43,292 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:43:43,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:43,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-10-16 02:43:43,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:43,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:43:43,910 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:43:43,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:43,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1628382821, now seen corresponding path program 1 times [2021-10-16 02:43:43,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:43:43,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362234316] [2021-10-16 02:43:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:43,911 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:43:43,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:43:43,911 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:43:43,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:43:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:44,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:43:44,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:44,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:44,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:43:44,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362234316] [2021-10-16 02:43:44,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362234316] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:44,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1677835416] [2021-10-16 02:43:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:44,512 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:43:44,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:43:44,513 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:43:44,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-16 02:43:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:44,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:43:44,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:44,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:44,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1677835416] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:44,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408798343] [2021-10-16 02:43:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:44,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:43:44,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:43:44,954 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:43:44,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-16 02:43:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:45,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:43:45,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:45,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:45,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408798343] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:45,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:43:45,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-10-16 02:43:45,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100891072] [2021-10-16 02:43:45,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 02:43:45,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:43:45,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 02:43:45,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:43:45,361 INFO L87 Difference]: Start difference. First operand 171 states and 208 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 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 02:43:46,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:43:46,038 INFO L93 Difference]: Finished difference Result 663 states and 857 transitions. [2021-10-16 02:43:46,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 02:43:46,038 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 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 27 [2021-10-16 02:43:46,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:43:46,043 INFO L225 Difference]: With dead ends: 663 [2021-10-16 02:43:46,043 INFO L226 Difference]: Without dead ends: 494 [2021-10-16 02:43:46,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 552.7ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-16 02:43:46,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-10-16 02:43:46,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 491. [2021-10-16 02:43:46,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.1122448979591837) internal successors, (545), 490 states have internal predecessors, (545), 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 02:43:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 545 transitions. [2021-10-16 02:43:46,106 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 545 transitions. Word has length 27 [2021-10-16 02:43:46,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:43:46,107 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 545 transitions. [2021-10-16 02:43:46,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 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 02:43:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 545 transitions. [2021-10-16 02:43:46,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-16 02:43:46,113 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:46,113 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:43:46,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:46,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:46,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:46,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:43:46,731 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:43:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:46,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1844111131, now seen corresponding path program 2 times [2021-10-16 02:43:46,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:43:46,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002804117] [2021-10-16 02:43:46,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:43:46,733 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:43:46,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:43:46,735 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:43:46,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:43:46,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:43:46,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:43:46,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:43:46,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:47,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:48,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:43:48,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002804117] [2021-10-16 02:43:48,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002804117] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:48,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1844279889] [2021-10-16 02:43:48,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:43:48,227 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:43:48,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:43:48,234 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:43:48,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-16 02:43:48,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:43:48,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:43:48,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:43:48,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:48,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:48,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1844279889] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:48,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509054675] [2021-10-16 02:43:48,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:43:48,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:43:48,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:43:48,950 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:43:48,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-16 02:43:49,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:43:49,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:43:49,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:43:49,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:49,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:49,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509054675] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:49,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:43:49,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 32 [2021-10-16 02:43:49,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896354935] [2021-10-16 02:43:49,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-16 02:43:49,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:43:49,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-16 02:43:49,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-16 02:43:49,602 INFO L87 Difference]: Start difference. First operand 491 states and 545 transitions. Second operand has 32 states, 32 states have (on average 2.96875) internal successors, (95), 32 states have internal predecessors, (95), 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 02:43:52,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:43:52,855 INFO L93 Difference]: Finished difference Result 1990 states and 2411 transitions. [2021-10-16 02:43:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-16 02:43:52,855 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.96875) internal successors, (95), 32 states have internal predecessors, (95), 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 51 [2021-10-16 02:43:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:43:52,864 INFO L225 Difference]: With dead ends: 1990 [2021-10-16 02:43:52,864 INFO L226 Difference]: Without dead ends: 1501 [2021-10-16 02:43:52,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3138.1ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-16 02:43:52,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-10-16 02:43:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1460. [2021-10-16 02:43:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 1.0705962988348183) internal successors, (1562), 1459 states have internal predecessors, (1562), 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 02:43:52,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 1562 transitions. [2021-10-16 02:43:52,981 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 1562 transitions. Word has length 51 [2021-10-16 02:43:52,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:43:52,981 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 1562 transitions. [2021-10-16 02:43:52,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.96875) internal successors, (95), 32 states have internal predecessors, (95), 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 02:43:52,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 1562 transitions. [2021-10-16 02:43:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-16 02:43:52,997 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:52,998 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 27, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:43:53,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:53,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:53,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:53,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:43:53,605 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:43:53,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:53,606 INFO L82 PathProgramCache]: Analyzing trace with hash 968799767, now seen corresponding path program 3 times [2021-10-16 02:43:53,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:43:53,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681754978] [2021-10-16 02:43:53,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:43:53,606 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:43:53,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:43:53,607 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:43:53,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-16 02:43:53,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 02:43:53,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:43:53,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:43:53,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2021-10-16 02:43:54,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2021-10-16 02:43:55,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:43:55,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681754978] [2021-10-16 02:43:55,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681754978] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:43:55,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:43:55,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-10-16 02:43:55,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300645483] [2021-10-16 02:43:55,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:43:55,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:43:55,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:43:55,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:43:55,136 INFO L87 Difference]: Start difference. First operand 1460 states and 1562 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:55,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:43:55,522 INFO L93 Difference]: Finished difference Result 4272 states and 4569 transitions. [2021-10-16 02:43:55,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:43:55,523 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-10-16 02:43:55,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:43:55,549 INFO L225 Difference]: With dead ends: 4272 [2021-10-16 02:43:55,549 INFO L226 Difference]: Without dead ends: 4270 [2021-10-16 02:43:55,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:43:55,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2021-10-16 02:43:55,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 2817. [2021-10-16 02:43:55,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 1.0696022727272727) internal successors, (3012), 2816 states have internal predecessors, (3012), 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 02:43:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 3012 transitions. [2021-10-16 02:43:55,782 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 3012 transitions. Word has length 99 [2021-10-16 02:43:55,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:43:55,785 INFO L470 AbstractCegarLoop]: Abstraction has 2817 states and 3012 transitions. [2021-10-16 02:43:55,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:55,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 3012 transitions. [2021-10-16 02:43:55,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-16 02:43:55,790 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:55,790 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 26, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:43:55,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:56,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:43:56,004 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:43:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:56,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1205348839, now seen corresponding path program 1 times [2021-10-16 02:43:56,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:43:56,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904020943] [2021-10-16 02:43:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:56,007 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:43:56,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:43:56,008 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:43:56,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 02:43:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:56,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:43:56,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 521 proven. 77 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-10-16 02:43:56,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 551 proven. 45 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2021-10-16 02:43:57,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:43:57,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904020943] [2021-10-16 02:43:57,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904020943] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:57,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [929487893] [2021-10-16 02:43:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:57,219 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:43:57,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:43:57,223 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:43:57,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-16 02:43:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:57,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:43:57,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 521 proven. 77 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-10-16 02:43:58,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 551 proven. 45 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2021-10-16 02:43:58,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [929487893] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:58,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419310909] [2021-10-16 02:43:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:58,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:43:58,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:43:58,302 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:43:58,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-16 02:43:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:58,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-16 02:43:58,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:44:00,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 143 proven. 1190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:44:02,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419310909] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:44:02,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:44:02,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 34, 32] total 64 [2021-10-16 02:44:02,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082975930] [2021-10-16 02:44:02,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-10-16 02:44:02,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:44:02,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-10-16 02:44:02,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2021-10-16 02:44:02,344 INFO L87 Difference]: Start difference. First operand 2817 states and 3012 transitions. Second operand has 64 states, 64 states have (on average 3.171875) internal successors, (203), 64 states have internal predecessors, (203), 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 02:44:30,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:44:30,685 INFO L93 Difference]: Finished difference Result 7961 states and 9491 transitions. [2021-10-16 02:44:30,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-10-16 02:44:30,695 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.171875) internal successors, (203), 64 states have internal predecessors, (203), 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 99 [2021-10-16 02:44:30,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:44:30,723 INFO L225 Difference]: With dead ends: 7961 [2021-10-16 02:44:30,723 INFO L226 Difference]: Without dead ends: 5380 [2021-10-16 02:44:30,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 553 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 19839.9ms TimeCoverageRelationStatistics Valid=2958, Invalid=6548, Unknown=0, NotChecked=0, Total=9506 [2021-10-16 02:44:30,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5380 states. [2021-10-16 02:44:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5380 to 4521. [2021-10-16 02:44:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4521 states, 4520 states have (on average 1.0606194690265487) internal successors, (4794), 4520 states have internal predecessors, (4794), 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 02:44:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4521 states to 4521 states and 4794 transitions. [2021-10-16 02:44:31,516 INFO L78 Accepts]: Start accepts. Automaton has 4521 states and 4794 transitions. Word has length 99 [2021-10-16 02:44:31,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:44:31,517 INFO L470 AbstractCegarLoop]: Abstraction has 4521 states and 4794 transitions. [2021-10-16 02:44:31,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.171875) internal successors, (203), 64 states have internal predecessors, (203), 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 02:44:31,517 INFO L276 IsEmpty]: Start isEmpty. Operand 4521 states and 4794 transitions. [2021-10-16 02:44:31,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-16 02:44:31,522 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:44:31,522 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:44:31,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-16 02:44:31,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:44:31,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-16 02:44:32,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:44:32,146 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:44:32,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:44:32,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1882946013, now seen corresponding path program 3 times [2021-10-16 02:44:32,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:44:32,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555833976] [2021-10-16 02:44:32,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:44:32,148 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:44:32,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:44:32,149 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:44:32,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-16 02:44:32,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 02:44:32,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:44:32,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:44:32,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2021-10-16 02:44:33,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2021-10-16 02:44:34,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:44:34,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555833976] [2021-10-16 02:44:34,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555833976] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:44:34,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:44:34,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-10-16 02:44:34,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349527079] [2021-10-16 02:44:34,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:44:34,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:44:34,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:44:34,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:44:34,028 INFO L87 Difference]: Start difference. First operand 4521 states and 4794 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 02:44:34,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:44:34,798 INFO L93 Difference]: Finished difference Result 6186 states and 6582 transitions. [2021-10-16 02:44:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:44:34,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 99 [2021-10-16 02:44:34,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:44:34,826 INFO L225 Difference]: With dead ends: 6186 [2021-10-16 02:44:34,826 INFO L226 Difference]: Without dead ends: 6184 [2021-10-16 02:44:34,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-10-16 02:44:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6184 states. [2021-10-16 02:44:35,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6184 to 4521. [2021-10-16 02:44:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4521 states, 4520 states have (on average 1.0606194690265487) internal successors, (4794), 4520 states have internal predecessors, (4794), 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 02:44:35,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4521 states to 4521 states and 4794 transitions. [2021-10-16 02:44:35,474 INFO L78 Accepts]: Start accepts. Automaton has 4521 states and 4794 transitions. Word has length 99 [2021-10-16 02:44:35,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:44:35,475 INFO L470 AbstractCegarLoop]: Abstraction has 4521 states and 4794 transitions. [2021-10-16 02:44:35,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 02:44:35,475 INFO L276 IsEmpty]: Start isEmpty. Operand 4521 states and 4794 transitions. [2021-10-16 02:44:35,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-16 02:44:35,480 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:44:35,480 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:44:35,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-10-16 02:44:35,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:44:35,709 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:44:35,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:44:35,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1075386847, now seen corresponding path program 1 times [2021-10-16 02:44:35,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:44:35,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214776581] [2021-10-16 02:44:35,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:44:35,710 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:44:35,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:44:35,711 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:44:35,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-16 02:44:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:44:36,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-16 02:44:36,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:44:37,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:44:40,266 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:44:40,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214776581] [2021-10-16 02:44:40,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214776581] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:44:40,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [254305124] [2021-10-16 02:44:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:44:40,266 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:44:40,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:44:40,268 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:44:40,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-16 02:44:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:44:41,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:44:41,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2021-10-16 02:44:41,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2021-10-16 02:44:41,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [254305124] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:44:41,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-16 02:44:41,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [33, 33] total 66 [2021-10-16 02:44:41,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60187674] [2021-10-16 02:44:41,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:44:41,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:44:41,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:44:41,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2021-10-16 02:44:41,815 INFO L87 Difference]: Start difference. First operand 4521 states and 4794 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 02:44:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:44:42,245 INFO L93 Difference]: Finished difference Result 7406 states and 7841 transitions. [2021-10-16 02:44:42,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:44:42,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 99 [2021-10-16 02:44:42,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:44:42,262 INFO L225 Difference]: With dead ends: 7406 [2021-10-16 02:44:42,262 INFO L226 Difference]: Without dead ends: 4546 [2021-10-16 02:44:42,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3361.6ms TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2021-10-16 02:44:42,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2021-10-16 02:44:42,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 4530. [2021-10-16 02:44:42,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4530 states, 4529 states have (on average 1.061823802163833) internal successors, (4809), 4529 states have internal predecessors, (4809), 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 02:44:42,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 4809 transitions. [2021-10-16 02:44:42,875 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 4809 transitions. Word has length 99 [2021-10-16 02:44:42,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:44:42,876 INFO L470 AbstractCegarLoop]: Abstraction has 4530 states and 4809 transitions. [2021-10-16 02:44:42,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 02:44:42,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 4809 transitions. [2021-10-16 02:44:42,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-16 02:44:42,881 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:44:42,881 INFO L512 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:44:42,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:44:43,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:44:43,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:44:43,296 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:44:43,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:44:43,297 INFO L82 PathProgramCache]: Analyzing trace with hash 77094717, now seen corresponding path program 2 times [2021-10-16 02:44:43,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:44:43,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255206278] [2021-10-16 02:44:43,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:44:43,297 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:44:43,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:44:43,298 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:44:43,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-16 02:44:43,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:44:43,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:44:43,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:44:43,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-10-16 02:44:44,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-10-16 02:44:44,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:44:44,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255206278] [2021-10-16 02:44:44,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255206278] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:44:44,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1653909764] [2021-10-16 02:44:44,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:44:44,732 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:44:44,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:44:44,733 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:44:44,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-16 02:44:45,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:44:45,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:44:45,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-16 02:44:45,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:44:47,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 237 proven. 1276 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 02:44:49,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1653909764] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:44:49,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103222044] [2021-10-16 02:44:49,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:44:49,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:44:49,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:44:49,529 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:44:49,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-16 02:44:50,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:44:50,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:44:50,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:44:50,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-10-16 02:44:50,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 210 proven. 29 refuted. 0 times theorem prover too weak. 1281 trivial. 0 not checked. [2021-10-16 02:44:50,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103222044] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:44:50,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:44:50,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 36, 33, 7, 5] total 73 [2021-10-16 02:44:50,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372738439] [2021-10-16 02:44:50,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-10-16 02:44:50,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:44:50,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-10-16 02:44:50,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1302, Invalid=3954, Unknown=0, NotChecked=0, Total=5256 [2021-10-16 02:44:50,991 INFO L87 Difference]: Start difference. First operand 4530 states and 4809 transitions. Second operand has 73 states, 73 states have (on average 3.041095890410959) internal successors, (222), 73 states have internal predecessors, (222), 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 02:45:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:38,217 INFO L93 Difference]: Finished difference Result 9368 states and 10343 transitions. [2021-10-16 02:45:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-10-16 02:45:38,218 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.041095890410959) internal successors, (222), 73 states have internal predecessors, (222), 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 105 [2021-10-16 02:45:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:38,239 INFO L225 Difference]: With dead ends: 9368 [2021-10-16 02:45:38,240 INFO L226 Difference]: Without dead ends: 6215 [2021-10-16 02:45:38,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 583 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19068 ImplicationChecksByTransitivity, 39994.9ms TimeCoverageRelationStatistics Valid=13557, Invalid=38199, Unknown=0, NotChecked=0, Total=51756 [2021-10-16 02:45:38,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6215 states. [2021-10-16 02:45:38,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6215 to 4674. [2021-10-16 02:45:38,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 1.0716884228546972) internal successors, (5008), 4673 states have internal predecessors, (5008), 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 02:45:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 5008 transitions. [2021-10-16 02:45:38,748 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 5008 transitions. Word has length 105 [2021-10-16 02:45:38,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:38,749 INFO L470 AbstractCegarLoop]: Abstraction has 4674 states and 5008 transitions. [2021-10-16 02:45:38,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.041095890410959) internal successors, (222), 73 states have internal predecessors, (222), 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 02:45:38,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 5008 transitions. [2021-10-16 02:45:38,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-10-16 02:45:38,760 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:38,760 INFO L512 BasicCegarLoop]: trace histogram [60, 60, 58, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-16 02:45:38,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:38,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:39,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:39,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:45:39,374 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:45:39,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:39,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1848907781, now seen corresponding path program 1 times [2021-10-16 02:45:39,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:39,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571303200] [2021-10-16 02:45:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:39,375 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:39,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:39,376 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:39,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-16 02:45:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:40,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-16 02:45:40,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5436 backedges. 2762 proven. 1335 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-10-16 02:45:41,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5436 backedges. 2762 proven. 1335 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-10-16 02:45:43,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:43,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571303200] [2021-10-16 02:45:43,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571303200] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:43,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2113717491] [2021-10-16 02:45:43,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:43,819 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:45:43,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:45:43,820 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:45:43,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-16 02:45:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:45,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-16 02:45:45,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5436 backedges. 2762 proven. 1335 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-10-16 02:45:45,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5436 backedges. 2762 proven. 1335 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-10-16 02:45:46,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2113717491] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:46,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735391989] [2021-10-16 02:45:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:46,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:46,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:46,025 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:45:46,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-16 02:45:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:47,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-16 02:45:47,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5436 backedges. 2766 proven. 1335 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2021-10-16 02:45:47,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5436 backedges. 2766 proven. 1335 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2021-10-16 02:45:50,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735391989] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:50,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:45:50,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33, 33, 34, 34] total 96 [2021-10-16 02:45:50,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553555544] [2021-10-16 02:45:50,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-10-16 02:45:50,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:50,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-10-16 02:45:50,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2607, Invalid=6513, Unknown=0, NotChecked=0, Total=9120 [2021-10-16 02:45:50,116 INFO L87 Difference]: Start difference. First operand 4674 states and 5008 transitions. Second operand has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 96 states have internal predecessors, (298), 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 02:46:08,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:08,992 INFO L93 Difference]: Finished difference Result 19820 states and 24249 transitions. [2021-10-16 02:46:08,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-10-16 02:46:08,992 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 96 states have internal predecessors, (298), 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 195 [2021-10-16 02:46:08,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:09,023 INFO L225 Difference]: With dead ends: 19820 [2021-10-16 02:46:09,023 INFO L226 Difference]: Without dead ends: 16902 [2021-10-16 02:46:09,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1196 GetRequests, 1070 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 20316.2ms TimeCoverageRelationStatistics Valid=5121, Invalid=11135, Unknown=0, NotChecked=0, Total=16256 [2021-10-16 02:46:09,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16902 states. [2021-10-16 02:46:10,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16902 to 16822. [2021-10-16 02:46:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16822 states, 16821 states have (on average 1.0291897033470068) internal successors, (17312), 16821 states have internal predecessors, (17312), 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 02:46:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16822 states to 16822 states and 17312 transitions. [2021-10-16 02:46:10,687 INFO L78 Accepts]: Start accepts. Automaton has 16822 states and 17312 transitions. Word has length 195 [2021-10-16 02:46:10,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:10,688 INFO L470 AbstractCegarLoop]: Abstraction has 16822 states and 17312 transitions. [2021-10-16 02:46:10,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 96 states have internal predecessors, (298), 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 02:46:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 16822 states and 17312 transitions. [2021-10-16 02:46:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-10-16 02:46:10,720 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:10,720 INFO L512 BasicCegarLoop]: trace histogram [124, 124, 120, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-16 02:46:10,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-10-16 02:46:10,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:11,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:11,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:11,327 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:46:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash -2000573559, now seen corresponding path program 2 times [2021-10-16 02:46:11,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:11,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936377563] [2021-10-16 02:46:11,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:46:11,329 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:11,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:11,330 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:11,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-16 02:46:12,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:46:12,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:46:12,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-16 02:46:12,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 8836 proven. 1457 refuted. 0 times theorem prover too weak. 12839 trivial. 0 not checked. [2021-10-16 02:46:14,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 8898 proven. 1395 refuted. 0 times theorem prover too weak. 12839 trivial. 0 not checked. [2021-10-16 02:46:18,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:18,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936377563] [2021-10-16 02:46:18,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936377563] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:18,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [437554308] [2021-10-16 02:46:18,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:46:18,229 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:46:18,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:46:18,242 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:46:18,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-16 02:46:20,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:46:20,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:46:20,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-16 02:46:20,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 8836 proven. 1457 refuted. 0 times theorem prover too weak. 12839 trivial. 0 not checked. [2021-10-16 02:46:21,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 8898 proven. 1395 refuted. 0 times theorem prover too weak. 12839 trivial. 0 not checked. [2021-10-16 02:46:22,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [437554308] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:22,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214748367] [2021-10-16 02:46:22,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:46:22,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:22,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:46:22,138 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:46:22,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-16 02:46:23,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:46:23,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:46:23,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-16 02:46:23,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 8836 proven. 1457 refuted. 0 times theorem prover too weak. 12839 trivial. 0 not checked. [2021-10-16 02:46:24,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 8898 proven. 1395 refuted. 0 times theorem prover too weak. 12839 trivial. 0 not checked. [2021-10-16 02:46:25,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214748367] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:25,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:46:25,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 35, 34, 35, 34] total 67 [2021-10-16 02:46:25,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746202752] [2021-10-16 02:46:25,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-10-16 02:46:25,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:46:25,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-10-16 02:46:25,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3267, Unknown=0, NotChecked=0, Total=4422 [2021-10-16 02:46:25,958 INFO L87 Difference]: Start difference. First operand 16822 states and 17312 transitions. Second operand has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 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 02:46:51,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:51,066 INFO L93 Difference]: Finished difference Result 28528 states and 29543 transitions. [2021-10-16 02:46:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-10-16 02:46:51,070 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 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 387 [2021-10-16 02:46:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:51,097 INFO L225 Difference]: With dead ends: 28528 [2021-10-16 02:46:51,097 INFO L226 Difference]: Without dead ends: 15398 [2021-10-16 02:46:51,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2380 GetRequests, 2276 SyntacticMatches, 6 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 21430.5ms TimeCoverageRelationStatistics Valid=3240, Invalid=6660, Unknown=0, NotChecked=0, Total=9900 [2021-10-16 02:46:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15398 states. [2021-10-16 02:46:52,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15398 to 14436. [2021-10-16 02:46:52,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14436 states, 14435 states have (on average 1.0302736404572221) internal successors, (14872), 14435 states have internal predecessors, (14872), 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 02:46:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14436 states to 14436 states and 14872 transitions. [2021-10-16 02:46:52,669 INFO L78 Accepts]: Start accepts. Automaton has 14436 states and 14872 transitions. Word has length 387 [2021-10-16 02:46:52,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:52,670 INFO L470 AbstractCegarLoop]: Abstraction has 14436 states and 14872 transitions. [2021-10-16 02:46:52,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 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 02:46:52,670 INFO L276 IsEmpty]: Start isEmpty. Operand 14436 states and 14872 transitions. [2021-10-16 02:46:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-10-16 02:46:52,702 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:52,702 INFO L512 BasicCegarLoop]: trace histogram [124, 124, 122, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-16 02:46:52,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:52,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:53,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:53,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:53,318 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:46:53,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:53,319 INFO L82 PathProgramCache]: Analyzing trace with hash -556004347, now seen corresponding path program 3 times [2021-10-16 02:46:53,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:53,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910734876] [2021-10-16 02:46:53,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:46:53,319 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:53,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:53,320 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:53,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-16 02:46:54,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 02:46:54,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:46:54,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:46:54,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 11845 proven. 1 refuted. 0 times theorem prover too weak. 11286 trivial. 0 not checked. [2021-10-16 02:46:55,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 11661 proven. 185 refuted. 0 times theorem prover too weak. 11286 trivial. 0 not checked. [2021-10-16 02:46:56,856 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:56,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910734876] [2021-10-16 02:46:56,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910734876] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:56,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1303115291] [2021-10-16 02:46:56,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:46:56,857 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:46:56,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:46:56,858 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:46:56,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-10-16 02:46:59,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 02:46:59,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:46:59,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:46:59,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:47:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 184 proven. 11662 refuted. 0 times theorem prover too weak. 11286 trivial. 0 not checked. [2021-10-16 02:47:01,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:47:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 3 proven. 496 refuted. 0 times theorem prover too weak. 22633 trivial. 0 not checked. [2021-10-16 02:47:02,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1303115291] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:47:02,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796987192] [2021-10-16 02:47:02,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:47:02,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:47:02,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:47:02,995 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:47:02,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-16 02:47:05,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 02:47:05,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:47:05,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 02:47:05,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:47:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 182 proven. 11785 refuted. 0 times theorem prover too weak. 11165 trivial. 0 not checked. [2021-10-16 02:47:09,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:47:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 11661 proven. 306 refuted. 0 times theorem prover too weak. 11165 trivial. 0 not checked. [2021-10-16 02:47:19,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796987192] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:47:19,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:47:19,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 13, 11] total 31 [2021-10-16 02:47:19,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930331588] [2021-10-16 02:47:19,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-16 02:47:19,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:47:19,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-16 02:47:19,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=706, Unknown=0, NotChecked=0, Total=930 [2021-10-16 02:47:19,103 INFO L87 Difference]: Start difference. First operand 14436 states and 14872 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 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 02:47:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:47:22,540 INFO L93 Difference]: Finished difference Result 23696 states and 24383 transitions. [2021-10-16 02:47:22,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-16 02:47:22,540 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 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 387 [2021-10-16 02:47:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:47:22,541 INFO L225 Difference]: With dead ends: 23696 [2021-10-16 02:47:22,542 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:47:22,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2339 GetRequests, 2288 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1783.3ms TimeCoverageRelationStatistics Valid=606, Invalid=1844, Unknown=0, NotChecked=0, Total=2450 [2021-10-16 02:47:22,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:47:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:47:22,558 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 02:47:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:47:22,558 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 387 [2021-10-16 02:47:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:47:22,558 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:47:22,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 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 02:47:22,559 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:47:22,559 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:47:22,562 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:47:22,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-10-16 02:47:22,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-10-16 02:47:22,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-16 02:47:23,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:47:23,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:47:23,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:47:27,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:53:28,235 WARN L207 SmtUtils]: Spent 6.01 m on a formula simplification. DAG size of input: 11673 DAG size of output: 861 [2021-10-16 02:53:51,001 WARN L207 SmtUtils]: Spent 19.83 s on a formula simplification. DAG size of input: 804 DAG size of output: 24 [2021-10-16 02:53:51,004 INFO L857 garLoopResultBuilder]: For program point L23-2(lines 23 24) no Hoare annotation was computed. [2021-10-16 02:53:51,004 INFO L853 garLoopResultBuilder]: At program point L23-3(lines 23 24) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~st~0 (_ bv1 32))) (.cse3 (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (.cse4 (bvslt ~last~0 (_ bv200000 32))) (.cse1 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0)) (.cse2 (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~c~0) (_ bv200000 32)))) (or (and (= ULTIMATE.start_main_~b~0 (_ bv0 32)) .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse1 .cse2) (and .cse4 .cse3 .cse1 .cse2) (and .cse4 (= ULTIMATE.start_main_~a~0 (_ bv0 32)) .cse1 .cse2))) [2021-10-16 02:53:51,004 INFO L857 garLoopResultBuilder]: For program point L23-4(lines 21 31) no Hoare annotation was computed. [2021-10-16 02:53:51,005 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-16 02:53:51,005 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:53:51,005 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-16 02:53:51,005 INFO L857 garLoopResultBuilder]: For program point L28-1(lines 28 29) no Hoare annotation was computed. [2021-10-16 02:53:51,005 INFO L857 garLoopResultBuilder]: For program point L24(line 24) no Hoare annotation was computed. [2021-10-16 02:53:51,005 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-10-16 02:53:51,005 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 14) no Hoare annotation was computed. [2021-10-16 02:53:51,006 INFO L853 garLoopResultBuilder]: At program point L12-2(lines 11 31) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0))) (or (and (not (bvslt ULTIMATE.start_main_~c~0 (_ bv200000 32))) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) .cse0 (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~c~0) (_ bv200000 32))) (and (= ULTIMATE.start_main_~a~0 (_ bv0 32)) .cse0 (= ULTIMATE.start_main_~c~0 (_ bv0 32))))) [2021-10-16 02:53:51,006 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:53:51,006 INFO L857 garLoopResultBuilder]: For program point L25-1(lines 21 31) no Hoare annotation was computed. [2021-10-16 02:53:51,006 INFO L857 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2021-10-16 02:53:51,006 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 32) no Hoare annotation was computed. [2021-10-16 02:53:51,011 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:53:51,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:53:51 BoogieIcfgContainer [2021-10-16 02:53:51,029 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:53:51,030 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:53:51,030 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:53:51,030 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:53:51,031 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:43:34" (3/4) ... [2021-10-16 02:53:51,034 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:53:51,045 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-16 02:53:51,046 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-16 02:53:51,046 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:53:51,046 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:53:51,080 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:53:51,081 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:53:51,082 INFO L168 Benchmark]: Toolchain (without parser) took 617145.79 ms. Allocated memory was 77.6 MB in the beginning and 4.1 GB in the end (delta: 4.0 GB). Free memory was 56.4 MB in the beginning and 3.6 GB in the end (delta: -3.5 GB). Peak memory consumption was 525.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:51,082 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 50.3 MB. Free memory was 30.3 MB in the beginning and 30.3 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:53:51,083 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.88 ms. Allocated memory is still 77.6 MB. Free memory was 56.2 MB in the beginning and 46.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:51,083 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.42 ms. Allocated memory is still 77.6 MB. Free memory was 46.2 MB in the beginning and 44.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:51,083 INFO L168 Benchmark]: Boogie Preprocessor took 51.48 ms. Allocated memory is still 77.6 MB. Free memory was 44.8 MB in the beginning and 43.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:53:51,084 INFO L168 Benchmark]: RCFGBuilder took 426.97 ms. Allocated memory is still 77.6 MB. Free memory was 43.5 MB in the beginning and 54.5 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:51,084 INFO L168 Benchmark]: TraceAbstraction took 616253.76 ms. Allocated memory was 77.6 MB in the beginning and 4.1 GB in the end (delta: 4.0 GB). Free memory was 54.0 MB in the beginning and 3.6 GB in the end (delta: -3.5 GB). Peak memory consumption was 2.8 GB. Max. memory is 16.1 GB. [2021-10-16 02:53:51,085 INFO L168 Benchmark]: Witness Printer took 51.13 ms. Allocated memory is still 4.1 GB. Free memory was 3.6 GB in the beginning and 3.6 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:51,087 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 50.3 MB. Free memory was 30.3 MB in the beginning and 30.3 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 313.88 ms. Allocated memory is still 77.6 MB. Free memory was 56.2 MB in the beginning and 46.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.42 ms. Allocated memory is still 77.6 MB. Free memory was 46.2 MB in the beginning and 44.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.48 ms. Allocated memory is still 77.6 MB. Free memory was 44.8 MB in the beginning and 43.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 426.97 ms. Allocated memory is still 77.6 MB. Free memory was 43.5 MB in the beginning and 54.5 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 616253.76 ms. Allocated memory was 77.6 MB in the beginning and 4.1 GB in the end (delta: 4.0 GB). Free memory was 54.0 MB in the beginning and 3.6 GB in the end (delta: -3.5 GB). Peak memory consumption was 2.8 GB. Max. memory is 16.1 GB. * Witness Printer took 51.13 ms. Allocated memory is still 4.1 GB. Free memory was 3.6 GB in the beginning and 3.6 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.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: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 616148.7ms, OverallIterations: 14, TraceHistogramMax: 124, EmptinessCheckTime: 148.1ms, AutomataDifference: 132801.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 387833.5ms, InitialAbstractionConstructionTime: 15.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 342 SDtfs, 4133 SDslu, 5031 SDs, 0 SdLazy, 26556 SolverSat, 1477 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25253.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9008 GetRequests, 8153 SyntacticMatches, 14 SemanticMatches, 841 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24688 ImplicationChecksByTransitivity, 113435.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16822occurred in iteration=12, InterpolantAutomatonStates: 573, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6229.4ms AutomataMinimizationTime, 14 MinimizatonAttempts, 6766 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7948 NumberOfFragments, 88 HoareAnnotationTreeSize, 2 FomulaSimplifications, 2002962138 FormulaSimplificationTreeSizeReduction, 365040.2ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 212225 FormulaSimplificationTreeSizeReductionInter, 22749.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 385.1ms SsaConstructionTime, 1708.4ms SatisfiabilityAnalysisTime, 59511.6ms InterpolantComputationTime, 4299 NumberOfCodeBlocks, 3042 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 8532 ConstructedInterpolants, 184 QuantifiedInterpolants, 33784 SizeOfPredicates, 69 NumberOfNonLiveVariables, 4119 ConjunctsInSsa, 512 ConjunctsInUnsatCore, 66 InterpolantComputations, 7 PerfectInterpolantSequences, 287966/340384 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 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (((!~bvslt32(c, 200000bv32) && cond == 1bv32) && a == b) && ~bvslt32(~bvadd64(4294967295bv32, c), 200000bv32)) || ((a == 0bv32 && a == b) && c == 0bv32) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((((b == 0bv32 && st == 1bv32) && a == b) && ~bvslt32(~bvadd64(4294967295bv32, c), 200000bv32)) || (((st == 1bv32 && cond == 1bv32) && a == b) && ~bvslt32(~bvadd64(4294967295bv32, c), 200000bv32))) || (((~bvslt32(last, 200000bv32) && cond == 1bv32) && a == b) && ~bvslt32(~bvadd64(4294967295bv32, c), 200000bv32))) || (((~bvslt32(last, 200000bv32) && a == 0bv32) && a == b) && ~bvslt32(~bvadd64(4294967295bv32, c), 200000bv32)) RESULT: Ultimate proved your program to be correct! [2021-10-16 02:53:51,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce851844-f3cf-4498-bd4a-7649541f2f16/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...