./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/nested6.i --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_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/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_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/nested6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/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_1674a559-6ba4-4cca-aeb5-95a49ae72899/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 b3a725921be8310e882457f7f33c9ff7dbee0bc2 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/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_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/nested6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/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_1674a559-6ba4-4cca-aeb5-95a49ae72899/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 b3a725921be8310e882457f7f33c9ff7dbee0bc2 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:33:14,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:33:14,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:33:14,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:33:14,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:33:14,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:33:14,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:33:14,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:33:14,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:33:14,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:33:14,713 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:33:14,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:33:14,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:33:14,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:33:14,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:33:14,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:33:14,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:33:14,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:33:14,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:33:14,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:33:14,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:33:14,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:33:14,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:33:14,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:33:14,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:33:14,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:33:14,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:33:14,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:33:14,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:33:14,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:33:14,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:33:14,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:33:14,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:33:14,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:33:14,765 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:33:14,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:33:14,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:33:14,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:33:14,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:33:14,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:33:14,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:33:14,773 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:33:14,834 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:33:14,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:33:14,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:33:14,837 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:33:14,837 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:33:14,838 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:33:14,838 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:33:14,838 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:33:14,846 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:33:14,846 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:33:14,846 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:33:14,848 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:33:14,848 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:33:14,848 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:33:14,849 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:33:14,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:33:14,850 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:33:14,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:33:14,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:33:14,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:33:14,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:33:14,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:33:14,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:33:14,852 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:33:14,852 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:33:14,852 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:33:14,852 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:33:14,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:33:14,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:33:14,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:33:14,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:33:14,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:33:14,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:33:14,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:33:14,857 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:33:14,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:33:14,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:33:14,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:33:14,858 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:33:14,858 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_1674a559-6ba4-4cca-aeb5-95a49ae72899/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3a725921be8310e882457f7f33c9ff7dbee0bc2 [2021-10-16 02:33:15,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:33:15,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:33:15,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:33:15,232 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:33:15,234 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:33:15,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-invgen/nested6.i [2021-10-16 02:33:15,343 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/data/d12d9c672/c95be83f2ec5428c9245ef6f6fcde03d/FLAG5140453fc [2021-10-16 02:33:15,866 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:33:15,867 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/sv-benchmarks/c/loop-invgen/nested6.i [2021-10-16 02:33:15,874 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/data/d12d9c672/c95be83f2ec5428c9245ef6f6fcde03d/FLAG5140453fc [2021-10-16 02:33:16,228 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/data/d12d9c672/c95be83f2ec5428c9245ef6f6fcde03d [2021-10-16 02:33:16,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:33:16,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:33:16,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:33:16,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:33:16,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:33:16,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:33:16" (1/1) ... [2021-10-16 02:33:16,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@551d3d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:16, skipping insertion in model container [2021-10-16 02:33:16,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:33:16" (1/1) ... [2021-10-16 02:33:16,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:33:16,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:33:16,531 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_1674a559-6ba4-4cca-aeb5-95a49ae72899/sv-benchmarks/c/loop-invgen/nested6.i[893,906] [2021-10-16 02:33:16,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:33:16,556 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:33:16,577 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_1674a559-6ba4-4cca-aeb5-95a49ae72899/sv-benchmarks/c/loop-invgen/nested6.i[893,906] [2021-10-16 02:33:16,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:33:16,614 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:33:16,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:16 WrapperNode [2021-10-16 02:33:16,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:33:16,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:33:16,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:33:16,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:33:16,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:16" (1/1) ... [2021-10-16 02:33:16,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:16" (1/1) ... [2021-10-16 02:33:16,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:33:16,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:33:16,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:33:16,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:33:16,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:16" (1/1) ... [2021-10-16 02:33:16,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:16" (1/1) ... [2021-10-16 02:33:16,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:16" (1/1) ... [2021-10-16 02:33:16,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:16" (1/1) ... [2021-10-16 02:33:16,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:16" (1/1) ... [2021-10-16 02:33:16,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:16" (1/1) ... [2021-10-16 02:33:16,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:16" (1/1) ... [2021-10-16 02:33:16,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:33:16,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:33:16,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:33:16,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:33:16,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:16" (1/1) ... [2021-10-16 02:33:16,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:33:16,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:33:16,775 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:33:16,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:33:16,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:33:16,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:33:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:33:16,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:33:17,114 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:33:17,115 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-16 02:33:17,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:33:17 BoogieIcfgContainer [2021-10-16 02:33:17,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:33:17,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:33:17,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:33:17,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:33:17,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:33:16" (1/3) ... [2021-10-16 02:33:17,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af05f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:33:17, skipping insertion in model container [2021-10-16 02:33:17,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:16" (2/3) ... [2021-10-16 02:33:17,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af05f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:33:17, skipping insertion in model container [2021-10-16 02:33:17,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:33:17" (3/3) ... [2021-10-16 02:33:17,129 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.i [2021-10-16 02:33:17,135 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:33:17,135 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-16 02:33:17,192 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:33:17,200 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 02:33:17,201 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-16 02:33:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 21 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 02:33:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:33:17,225 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:33:17,226 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:33:17,227 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:33:17,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:33:17,233 INFO L82 PathProgramCache]: Analyzing trace with hash -885669119, now seen corresponding path program 1 times [2021-10-16 02:33:17,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:33:17,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984955714] [2021-10-16 02:33:17,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:17,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:33:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:17,591 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 02:33:17,592 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:33:17,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984955714] [2021-10-16 02:33:17,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984955714] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:33:17,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:33:17,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:33:17,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182757367] [2021-10-16 02:33:17,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:33:17,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:33:17,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:33:17,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:33:17,640 INFO L87 Difference]: Start difference. First operand has 22 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 21 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) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:33:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:33:17,785 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2021-10-16 02:33:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:33:17,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:33:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:33:17,799 INFO L225 Difference]: With dead ends: 50 [2021-10-16 02:33:17,799 INFO L226 Difference]: Without dead ends: 22 [2021-10-16 02:33:17,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:33:17,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-16 02:33:17,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2021-10-16 02:33:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:33:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-10-16 02:33:17,846 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 8 [2021-10-16 02:33:17,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:33:17,847 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-10-16 02:33:17,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:33:17,848 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-10-16 02:33:17,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:33:17,849 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:33:17,850 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:33:17,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:33:17,851 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:33:17,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:33:17,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1686703451, now seen corresponding path program 1 times [2021-10-16 02:33:17,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:33:17,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575647900] [2021-10-16 02:33:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:17,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:33:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:17,963 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 02:33:17,963 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:33:17,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575647900] [2021-10-16 02:33:17,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575647900] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:33:17,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:33:17,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:33:17,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690823424] [2021-10-16 02:33:17,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:33:17,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:33:17,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:33:17,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:33:17,968 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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 02:33:18,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:33:18,180 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-10-16 02:33:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:33:18,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-16 02:33:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:33:18,183 INFO L225 Difference]: With dead ends: 32 [2021-10-16 02:33:18,184 INFO L226 Difference]: Without dead ends: 30 [2021-10-16 02:33:18,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:33:18,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-16 02:33:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 15. [2021-10-16 02:33:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:33:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-10-16 02:33:18,191 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2021-10-16 02:33:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:33:18,192 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-10-16 02:33:18,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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 02:33:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-10-16 02:33:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:33:18,193 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:33:18,193 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:33:18,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:33:18,196 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:33:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:33:18,198 INFO L82 PathProgramCache]: Analyzing trace with hash -724341724, now seen corresponding path program 1 times [2021-10-16 02:33:18,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:33:18,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146625269] [2021-10-16 02:33:18,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:18,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:33:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:18,338 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 02:33:18,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:33:18,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146625269] [2021-10-16 02:33:18,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146625269] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:33:18,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:33:18,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:33:18,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207789584] [2021-10-16 02:33:18,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:33:18,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:33:18,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:33:18,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:33:18,347 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:33:18,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:33:18,457 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-10-16 02:33:18,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:33:18,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:33:18,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:33:18,461 INFO L225 Difference]: With dead ends: 32 [2021-10-16 02:33:18,461 INFO L226 Difference]: Without dead ends: 30 [2021-10-16 02:33:18,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:33:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-16 02:33:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-10-16 02:33:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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 02:33:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-16 02:33:18,489 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 10 [2021-10-16 02:33:18,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:33:18,489 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-16 02:33:18,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:33:18,490 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-16 02:33:18,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 02:33:18,492 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:33:18,492 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:33:18,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:33:18,493 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:33:18,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:33:18,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1122860341, now seen corresponding path program 1 times [2021-10-16 02:33:18,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:33:18,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945874553] [2021-10-16 02:33:18,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:18,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:33:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:18,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:33:18,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945874553] [2021-10-16 02:33:18,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945874553] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:33:18,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435918657] [2021-10-16 02:33:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:18,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:33:18,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:33:18,622 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:33:18,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:33:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:18,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:33:18,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:18,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:19,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435918657] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:33:19,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:33:19,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 9 [2021-10-16 02:33:19,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137980280] [2021-10-16 02:33:19,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:33:19,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:33:19,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:33:19,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:33:19,056 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:33:19,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:33:19,259 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2021-10-16 02:33:19,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:33:19,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-16 02:33:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:33:19,264 INFO L225 Difference]: With dead ends: 74 [2021-10-16 02:33:19,264 INFO L226 Difference]: Without dead ends: 55 [2021-10-16 02:33:19,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:33:19,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-16 02:33:19,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 25. [2021-10-16 02:33:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:33:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-10-16 02:33:19,294 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 14 [2021-10-16 02:33:19,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:33:19,294 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-10-16 02:33:19,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:33:19,295 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-10-16 02:33:19,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 02:33:19,297 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:33:19,297 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:33:19,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:33:19,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:33:19,517 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:33:19,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:33:19,517 INFO L82 PathProgramCache]: Analyzing trace with hash -113403786, now seen corresponding path program 1 times [2021-10-16 02:33:19,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:33:19,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855056497] [2021-10-16 02:33:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:19,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:33:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:19,611 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:33:19,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855056497] [2021-10-16 02:33:19,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855056497] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:33:19,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818994575] [2021-10-16 02:33:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:19,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:33:19,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:33:19,618 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:33:19,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:33:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:19,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:33:19,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:19,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:19,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818994575] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:33:19,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [372578342] [2021-10-16 02:33:19,858 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-10-16 02:33:19,859 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:33:19,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:33:19,868 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:33:19,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:33:19,954 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:33:19,963 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:33:19,964 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:33:19,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-16 02:33:19,973 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:33:19,974 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:33:19,977 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 02:33:19,980 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-10-16 02:33:20,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:33:20,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:33:20,048 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-16 02:33:20,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-16 02:33:20,051 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:33:20,053 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 02:33:20,056 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:33:20,058 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 02:33:20,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:33:20,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:33:20,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:33:20,105 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:33:20,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-16 02:33:20,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:33:20,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:102, output treesize:90 [2021-10-16 02:33:20,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-16 02:33:20,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:33:20,330 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_8| 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 02:33:20,334 INFO L168 Benchmark]: Toolchain (without parser) took 4100.65 ms. Allocated memory was 98.6 MB in the beginning and 130.0 MB in the end (delta: 31.5 MB). Free memory was 57.7 MB in the beginning and 96.0 MB in the end (delta: -38.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:33:20,334 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 98.6 MB. Free memory is still 74.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:33:20,334 INFO L168 Benchmark]: CACSL2BoogieTranslator took 373.19 ms. Allocated memory is still 98.6 MB. Free memory was 57.4 MB in the beginning and 73.7 MB in the end (delta: -16.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:33:20,335 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.10 ms. Allocated memory is still 98.6 MB. Free memory was 73.3 MB in the beginning and 72.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:33:20,335 INFO L168 Benchmark]: Boogie Preprocessor took 54.71 ms. Allocated memory is still 98.6 MB. Free memory was 72.1 MB in the beginning and 70.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:33:20,336 INFO L168 Benchmark]: RCFGBuilder took 390.47 ms. Allocated memory is still 98.6 MB. Free memory was 70.8 MB in the beginning and 59.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:33:20,336 INFO L168 Benchmark]: TraceAbstraction took 3212.71 ms. Allocated memory was 98.6 MB in the beginning and 130.0 MB in the end (delta: 31.5 MB). Free memory was 58.6 MB in the beginning and 96.0 MB in the end (delta: -37.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:33:20,339 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 98.6 MB. Free memory is still 74.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 373.19 ms. Allocated memory is still 98.6 MB. Free memory was 57.4 MB in the beginning and 73.7 MB in the end (delta: -16.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.10 ms. Allocated memory is still 98.6 MB. Free memory was 73.3 MB in the beginning and 72.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.71 ms. Allocated memory is still 98.6 MB. Free memory was 72.1 MB in the beginning and 70.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 390.47 ms. Allocated memory is still 98.6 MB. Free memory was 70.8 MB in the beginning and 59.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3212.71 ms. Allocated memory was 98.6 MB in the beginning and 130.0 MB in the end (delta: 31.5 MB). Free memory was 58.6 MB in the beginning and 96.0 MB in the end (delta: -37.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_8| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_8|: 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 02:33:20,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/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 02:33:22,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:33:22,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:33:22,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:33:22,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:33:22,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:33:22,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:33:22,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:33:22,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:33:22,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:33:22,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:33:22,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:33:22,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:33:22,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:33:22,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:33:22,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:33:22,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:33:22,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:33:22,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:33:22,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:33:22,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:33:22,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:33:22,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:33:22,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:33:22,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:33:22,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:33:22,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:33:22,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:33:22,760 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:33:22,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:33:22,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:33:22,762 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:33:22,763 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:33:22,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:33:22,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:33:22,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:33:22,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:33:22,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:33:22,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:33:22,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:33:22,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:33:22,787 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:33:22,835 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:33:22,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:33:22,836 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:33:22,837 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:33:22,837 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:33:22,837 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:33:22,837 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:33:22,837 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:33:22,838 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:33:22,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:33:22,840 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:33:22,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:33:22,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:33:22,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:33:22,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:33:22,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:33:22,841 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:33:22,841 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:33:22,842 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:33:22,842 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:33:22,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:33:22,842 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:33:22,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:33:22,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:33:22,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:33:22,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:33:22,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:33:22,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:33:22,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:33:22,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:33:22,844 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:33:22,844 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:33:22,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:33:22,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:33:22,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:33:22,845 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_1674a559-6ba4-4cca-aeb5-95a49ae72899/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3a725921be8310e882457f7f33c9ff7dbee0bc2 [2021-10-16 02:33:23,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:33:23,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:33:23,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:33:23,235 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:33:23,236 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:33:23,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-invgen/nested6.i [2021-10-16 02:33:23,308 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/data/b93ea026d/3d77cc1e3a7448baa2c6e118eba29507/FLAGcdfe1b09b [2021-10-16 02:33:23,887 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:33:23,888 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/sv-benchmarks/c/loop-invgen/nested6.i [2021-10-16 02:33:23,907 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/data/b93ea026d/3d77cc1e3a7448baa2c6e118eba29507/FLAGcdfe1b09b [2021-10-16 02:33:24,252 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/data/b93ea026d/3d77cc1e3a7448baa2c6e118eba29507 [2021-10-16 02:33:24,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:33:24,256 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:33:24,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:33:24,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:33:24,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:33:24,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:33:24" (1/1) ... [2021-10-16 02:33:24,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@379440c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:24, skipping insertion in model container [2021-10-16 02:33:24,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:33:24" (1/1) ... [2021-10-16 02:33:24,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:33:24,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:33:24,461 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_1674a559-6ba4-4cca-aeb5-95a49ae72899/sv-benchmarks/c/loop-invgen/nested6.i[893,906] [2021-10-16 02:33:24,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:33:24,499 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:33:24,530 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_1674a559-6ba4-4cca-aeb5-95a49ae72899/sv-benchmarks/c/loop-invgen/nested6.i[893,906] [2021-10-16 02:33:24,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:33:24,548 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:33:24,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:24 WrapperNode [2021-10-16 02:33:24,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:33:24,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:33:24,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:33:24,550 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:33:24,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:24" (1/1) ... [2021-10-16 02:33:24,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:24" (1/1) ... [2021-10-16 02:33:24,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:33:24,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:33:24,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:33:24,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:33:24,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:24" (1/1) ... [2021-10-16 02:33:24,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:24" (1/1) ... [2021-10-16 02:33:24,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:24" (1/1) ... [2021-10-16 02:33:24,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:24" (1/1) ... [2021-10-16 02:33:24,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:24" (1/1) ... [2021-10-16 02:33:24,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:24" (1/1) ... [2021-10-16 02:33:24,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:24" (1/1) ... [2021-10-16 02:33:24,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:33:24,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:33:24,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:33:24,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:33:24,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:24" (1/1) ... [2021-10-16 02:33:24,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:33:24,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:33:24,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:33:24,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:33:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:33:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:33:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:33:24,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:33:24,891 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:33:24,892 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-16 02:33:24,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:33:24 BoogieIcfgContainer [2021-10-16 02:33:24,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:33:24,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:33:24,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:33:24,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:33:24,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:33:24" (1/3) ... [2021-10-16 02:33:24,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc648e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:33:24, skipping insertion in model container [2021-10-16 02:33:24,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:33:24" (2/3) ... [2021-10-16 02:33:24,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc648e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:33:24, skipping insertion in model container [2021-10-16 02:33:24,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:33:24" (3/3) ... [2021-10-16 02:33:24,906 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.i [2021-10-16 02:33:24,911 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:33:24,911 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-16 02:33:24,970 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:33:24,976 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 02:33:24,977 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-16 02:33:25,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 25 states have internal predecessors, (37), 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 02:33:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:33:25,021 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:33:25,022 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:33:25,022 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:33:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:33:25,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1094943316, now seen corresponding path program 1 times [2021-10-16 02:33:25,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:33:25,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810505788] [2021-10-16 02:33:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:25,044 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:33:25,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:33:25,055 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:33:25,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:33:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:25,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:33:25,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:25,338 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 02:33:25,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:25,426 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 02:33:25,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:33:25,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810505788] [2021-10-16 02:33:25,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810505788] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:33:25,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:33:25,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:33:25,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51879345] [2021-10-16 02:33:25,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:33:25,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:33:25,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:33:25,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:33:25,464 INFO L87 Difference]: Start difference. First operand has 26 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 25 states have internal predecessors, (37), 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 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 02:33:25,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:33:25,770 INFO L93 Difference]: Finished difference Result 89 states and 130 transitions. [2021-10-16 02:33:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:33:25,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 10 [2021-10-16 02:33:25,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:33:25,788 INFO L225 Difference]: With dead ends: 89 [2021-10-16 02:33:25,788 INFO L226 Difference]: Without dead ends: 44 [2021-10-16 02:33:25,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:33:25,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-16 02:33:25,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2021-10-16 02:33:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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 02:33:25,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-16 02:33:25,855 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 10 [2021-10-16 02:33:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:33:25,856 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-16 02:33:25,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 02:33:25,857 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-16 02:33:25,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:33:25,860 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:33:25,861 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:33:25,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:33:26,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:33:26,073 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:33:26,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:33:26,075 INFO L82 PathProgramCache]: Analyzing trace with hash 415731034, now seen corresponding path program 1 times [2021-10-16 02:33:26,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:33:26,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499785575] [2021-10-16 02:33:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:26,077 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:33:26,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:33:26,079 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:33:26,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:33:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:26,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:33:26,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:26,315 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 02:33:26,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:26,412 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 02:33:26,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:33:26,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499785575] [2021-10-16 02:33:26,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499785575] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:33:26,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:33:26,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-10-16 02:33:26,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548497212] [2021-10-16 02:33:26,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:33:26,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:33:26,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:33:26,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:33:26,419 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:33:27,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:33:27,534 INFO L93 Difference]: Finished difference Result 228 states and 303 transitions. [2021-10-16 02:33:27,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-16 02:33:27,536 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-16 02:33:27,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:33:27,541 INFO L225 Difference]: With dead ends: 228 [2021-10-16 02:33:27,541 INFO L226 Difference]: Without dead ends: 226 [2021-10-16 02:33:27,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 550.4ms TimeCoverageRelationStatistics Valid=311, Invalid=879, Unknown=0, NotChecked=0, Total=1190 [2021-10-16 02:33:27,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-10-16 02:33:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 50. [2021-10-16 02:33:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 1.375) internal successors, (66), 49 states have internal predecessors, (66), 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 02:33:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2021-10-16 02:33:27,591 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 11 [2021-10-16 02:33:27,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:33:27,596 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2021-10-16 02:33:27,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:33:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2021-10-16 02:33:27,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:33:27,598 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:33:27,599 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:33:27,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:33:27,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:33:27,810 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:33:27,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:33:27,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1040435036, now seen corresponding path program 1 times [2021-10-16 02:33:27,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:33:27,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886852849] [2021-10-16 02:33:27,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:27,812 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:33:27,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:33:27,814 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:33:27,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:33:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:27,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:33:27,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:28,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:28,333 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:33:28,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886852849] [2021-10-16 02:33:28,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886852849] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:33:28,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2012974140] [2021-10-16 02:33:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:28,335 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:33:28,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:33:28,337 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:33:28,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-16 02:33:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:28,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:33:28,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:28,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:28,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2012974140] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:33:28,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-16 02:33:28,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [6, 6] total 17 [2021-10-16 02:33:28,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720480172] [2021-10-16 02:33:28,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:33:28,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:33:28,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:33:28,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-16 02:33:28,847 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:33:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:33:29,170 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2021-10-16 02:33:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:33:29,171 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 02:33:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:33:29,172 INFO L225 Difference]: With dead ends: 111 [2021-10-16 02:33:29,172 INFO L226 Difference]: Without dead ends: 81 [2021-10-16 02:33:29,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-10-16 02:33:29,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-16 02:33:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 51. [2021-10-16 02:33:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 50 states have internal predecessors, (64), 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 02:33:29,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-10-16 02:33:29,188 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 16 [2021-10-16 02:33:29,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:33:29,188 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-10-16 02:33:29,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:33:29,189 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-10-16 02:33:29,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 02:33:29,190 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:33:29,190 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:33:29,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:33:29,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:33:29,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:33:29,593 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:33:29,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:33:29,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1368262970, now seen corresponding path program 1 times [2021-10-16 02:33:29,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:33:29,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210610729] [2021-10-16 02:33:29,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:29,594 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:33:29,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:33:29,596 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:33:29,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:33:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:29,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:33:29,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:29,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:30,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:33:30,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210610729] [2021-10-16 02:33:30,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210610729] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:33:30,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1293787752] [2021-10-16 02:33:30,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:30,187 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:33:30,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:33:30,190 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:33:30,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-16 02:33:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:30,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:33:30,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:30,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:30,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1293787752] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:33:30,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366853456] [2021-10-16 02:33:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:30,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:33:30,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:33:30,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:33:30,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 02:33:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:30,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:33:30,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:30,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:31,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366853456] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:33:31,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:33:31,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 10] total 18 [2021-10-16 02:33:31,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732131070] [2021-10-16 02:33:31,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-16 02:33:31,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:33:31,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-16 02:33:31,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-10-16 02:33:31,321 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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 02:33:37,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:33:37,183 INFO L93 Difference]: Finished difference Result 370 states and 463 transitions. [2021-10-16 02:33:37,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-10-16 02:33:37,183 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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 17 [2021-10-16 02:33:37,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:33:37,186 INFO L225 Difference]: With dead ends: 370 [2021-10-16 02:33:37,186 INFO L226 Difference]: Without dead ends: 368 [2021-10-16 02:33:37,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4731 ImplicationChecksByTransitivity, 5151.2ms TimeCoverageRelationStatistics Valid=2519, Invalid=9037, Unknown=0, NotChecked=0, Total=11556 [2021-10-16 02:33:37,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-10-16 02:33:37,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 91. [2021-10-16 02:33:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 89 states have (on average 1.3820224719101124) internal successors, (123), 90 states have internal predecessors, (123), 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 02:33:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 123 transitions. [2021-10-16 02:33:37,234 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 123 transitions. Word has length 17 [2021-10-16 02:33:37,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:33:37,234 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 123 transitions. [2021-10-16 02:33:37,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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 02:33:37,235 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 123 transitions. [2021-10-16 02:33:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 02:33:37,236 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:33:37,236 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:33:37,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:33:37,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:33:37,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-16 02:33:37,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:33:37,859 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:33:37,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:33:37,859 INFO L82 PathProgramCache]: Analyzing trace with hash -856675865, now seen corresponding path program 1 times [2021-10-16 02:33:37,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:33:37,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722995276] [2021-10-16 02:33:37,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:37,860 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:33:37,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:33:37,861 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:33:37,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:33:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:37,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:33:37,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:38,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:38,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:33:38,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722995276] [2021-10-16 02:33:38,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722995276] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:33:38,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [703733046] [2021-10-16 02:33:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:38,486 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:33:38,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:33:38,488 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:33:38,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-16 02:33:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:38,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:33:38,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:38,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:39,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [703733046] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:33:39,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669712361] [2021-10-16 02:33:39,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:39,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:33:39,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:33:39,165 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:33:39,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-16 02:33:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:39,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:33:39,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:39,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:39,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669712361] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:33:39,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:33:39,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9, 6, 9, 6] total 21 [2021-10-16 02:33:39,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139722544] [2021-10-16 02:33:39,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-16 02:33:39,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:33:39,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-16 02:33:39,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-10-16 02:33:39,540 INFO L87 Difference]: Start difference. First operand 91 states and 123 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:33:45,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:33:45,828 INFO L93 Difference]: Finished difference Result 247 states and 336 transitions. [2021-10-16 02:33:45,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-10-16 02:33:45,829 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-16 02:33:45,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:33:45,830 INFO L225 Difference]: With dead ends: 247 [2021-10-16 02:33:45,830 INFO L226 Difference]: Without dead ends: 196 [2021-10-16 02:33:45,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3031 ImplicationChecksByTransitivity, 5735.9ms TimeCoverageRelationStatistics Valid=1437, Invalid=7493, Unknown=0, NotChecked=0, Total=8930 [2021-10-16 02:33:45,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-16 02:33:45,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 79. [2021-10-16 02:33:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.3461538461538463) internal successors, (105), 78 states have internal predecessors, (105), 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 02:33:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2021-10-16 02:33:45,854 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 19 [2021-10-16 02:33:45,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:33:45,855 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2021-10-16 02:33:45,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:33:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2021-10-16 02:33:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-16 02:33:45,856 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:33:45,856 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:33:45,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:33:46,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:33:46,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:33:46,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:33:46,474 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:33:46,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:33:46,474 INFO L82 PathProgramCache]: Analyzing trace with hash -2028882574, now seen corresponding path program 1 times [2021-10-16 02:33:46,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:33:46,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183574256] [2021-10-16 02:33:46,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:46,475 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:33:46,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:33:46,476 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:33:46,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:33:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:46,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:33:46,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:46,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:47,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:33:47,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183574256] [2021-10-16 02:33:47,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183574256] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:33:47,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1288003199] [2021-10-16 02:33:47,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:47,074 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:33:47,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:33:47,078 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:33:47,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-16 02:33:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:47,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:33:47,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:47,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:47,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1288003199] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:33:47,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968295743] [2021-10-16 02:33:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:47,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:33:47,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:33:47,614 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:33:47,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-16 02:33:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:47,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:33:47,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:47,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:48,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968295743] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:33:48,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:33:48,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2021-10-16 02:33:48,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496102199] [2021-10-16 02:33:48,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 02:33:48,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:33:48,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 02:33:48,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:33:48,114 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 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 02:33:53,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:33:53,544 INFO L93 Difference]: Finished difference Result 319 states and 407 transitions. [2021-10-16 02:33:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-10-16 02:33:53,545 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 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 20 [2021-10-16 02:33:53,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:33:53,547 INFO L225 Difference]: With dead ends: 319 [2021-10-16 02:33:53,547 INFO L226 Difference]: Without dead ends: 317 [2021-10-16 02:33:53,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 4126.2ms TimeCoverageRelationStatistics Valid=2134, Invalid=8168, Unknown=0, NotChecked=0, Total=10302 [2021-10-16 02:33:53,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-10-16 02:33:53,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 116. [2021-10-16 02:33:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.3478260869565217) internal successors, (155), 115 states have internal predecessors, (155), 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 02:33:53,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2021-10-16 02:33:53,595 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 20 [2021-10-16 02:33:53,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:33:53,595 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2021-10-16 02:33:53,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 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 02:33:53,596 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2021-10-16 02:33:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 02:33:53,597 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:33:53,597 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:33:53,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:33:53,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-10-16 02:33:54,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-16 02:33:54,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:33:54,209 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:33:54,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:33:54,209 INFO L82 PathProgramCache]: Analyzing trace with hash -766953900, now seen corresponding path program 1 times [2021-10-16 02:33:54,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:33:54,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470484834] [2021-10-16 02:33:54,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:54,210 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:33:54,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:33:54,211 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:33:54,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 02:33:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:54,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:33:54,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:54,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:54,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:33:54,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470484834] [2021-10-16 02:33:54,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470484834] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:33:54,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1430851956] [2021-10-16 02:33:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:54,820 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:33:54,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:33:54,821 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:33:54,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-16 02:33:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:55,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:33:55,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:55,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:55,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1430851956] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:33:55,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811394504] [2021-10-16 02:33:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:55,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:33:55,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:33:55,342 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:33:55,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-16 02:33:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:55,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:33:55,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:33:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:55,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:33:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:33:55,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811394504] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:33:55,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:33:55,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2021-10-16 02:33:55,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169877309] [2021-10-16 02:33:55,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 02:33:55,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:33:55,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 02:33:55,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:33:55,897 INFO L87 Difference]: Start difference. First operand 116 states and 155 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 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 02:33:59,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:33:59,023 INFO L93 Difference]: Finished difference Result 195 states and 247 transitions. [2021-10-16 02:33:59,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-16 02:33:59,023 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-16 02:33:59,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:33:59,024 INFO L225 Difference]: With dead ends: 195 [2021-10-16 02:33:59,025 INFO L226 Difference]: Without dead ends: 193 [2021-10-16 02:33:59,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 2544.6ms TimeCoverageRelationStatistics Valid=1150, Invalid=3140, Unknown=0, NotChecked=0, Total=4290 [2021-10-16 02:33:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-10-16 02:33:59,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 112. [2021-10-16 02:33:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2972972972972974) internal successors, (144), 111 states have internal predecessors, (144), 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 02:33:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 144 transitions. [2021-10-16 02:33:59,054 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 144 transitions. Word has length 23 [2021-10-16 02:33:59,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:33:59,054 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 144 transitions. [2021-10-16 02:33:59,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 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 02:33:59,055 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 144 transitions. [2021-10-16 02:33:59,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-16 02:33:59,056 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:33:59,056 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:33:59,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-16 02:33:59,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:33:59,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:33:59,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:33:59,670 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:33:59,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:33:59,671 INFO L82 PathProgramCache]: Analyzing trace with hash 890253013, now seen corresponding path program 1 times [2021-10-16 02:33:59,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:33:59,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112145903] [2021-10-16 02:33:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:33:59,671 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:33:59,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:33:59,673 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:33:59,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 02:33:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:33:59,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:33:59,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:34:00,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:34:00,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:00,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112145903] [2021-10-16 02:34:00,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112145903] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:34:00,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1512362536] [2021-10-16 02:34:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:00,664 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:34:00,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:34:00,665 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:34:00,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-16 02:34:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:01,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:34:01,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:34:01,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:34:01,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1512362536] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:34:01,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447259769] [2021-10-16 02:34:01,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:01,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:34:01,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:34:01,791 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:34:01,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-16 02:34:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:02,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:34:02,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:34:02,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:34:02,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447259769] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:34:02,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:34:02,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8, 7, 8, 7] total 29 [2021-10-16 02:34:02,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264478220] [2021-10-16 02:34:02,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-16 02:34:02,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:34:02,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-16 02:34:02,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-10-16 02:34:02,464 INFO L87 Difference]: Start difference. First operand 112 states and 144 transitions. Second operand has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 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 02:34:14,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:14,294 INFO L93 Difference]: Finished difference Result 396 states and 519 transitions. [2021-10-16 02:34:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-10-16 02:34:14,294 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-16 02:34:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:14,295 INFO L225 Difference]: With dead ends: 396 [2021-10-16 02:34:14,295 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:34:14,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9723 ImplicationChecksByTransitivity, 10190.8ms TimeCoverageRelationStatistics Valid=4081, Invalid=20411, Unknown=0, NotChecked=0, Total=24492 [2021-10-16 02:34:14,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:34:14,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:34:14,307 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 02:34:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:34:14,307 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-10-16 02:34:14,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:14,307 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:34:14,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 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 02:34:14,308 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:34:14,308 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:34:14,311 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:34:14,311 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:34:14,311 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:34:14,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-16 02:34:14,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:34:14,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:34:14,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:34:14,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:34:14,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:34:14,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:34:15,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:34:15,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:34:15,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:34:15,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:34:16,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:34:17,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:34:31,865 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-16 02:34:31,865 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-16 02:34:31,865 INFO L857 garLoopResultBuilder]: For program point L19-1(line 19) no Hoare annotation was computed. [2021-10-16 02:34:31,866 INFO L857 garLoopResultBuilder]: For program point L19-2(line 19) no Hoare annotation was computed. [2021-10-16 02:34:31,866 INFO L853 garLoopResultBuilder]: At program point L36-2(lines 36 38) the Hoare annotation is: (let ((.cse4 (bvmul ULTIMATE.start_main_~i~0 (_ bv2 32)))) (let ((.cse1 (bvsge ULTIMATE.start_main_~j~0 .cse4)) (.cse2 (bvsge ULTIMATE.start_main_~k~0 .cse4)) (.cse3 (bvslt ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~n~0)) (.cse0 (bvslt ULTIMATE.start_main_~n~0 (_ bv1000000 32)))) (or (and .cse0 (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (bvslt ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (or (not (bvslt (bvadd ULTIMATE.start_main_~j~0 (_ bv1 32)) ULTIMATE.start_main_~n~0)) (bvslt (bvadd ULTIMATE.start_main_~k~0 (_ bv1 32)) ULTIMATE.start_main_~n~0)) .cse1 .cse2 .cse3) (and .cse0 (bvsle ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) .cse1 (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) .cse2 .cse3) (and .cse0 (= ULTIMATE.start_main_~i~0 (_ bv0 32)) (= ULTIMATE.start_main_~j~0 (_ bv0 32)) (bvslt (_ bv0 32) ULTIMATE.start_main_~n~0) (= ULTIMATE.start_main_~k~0 (bvmul (_ bv2 32) ULTIMATE.start_main_~i~0)))))) [2021-10-16 02:34:31,866 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-16 02:34:31,866 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:34:31,866 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-16 02:34:31,867 INFO L857 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2021-10-16 02:34:31,867 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-16 02:34:31,867 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:34:31,867 INFO L857 garLoopResultBuilder]: For program point L33-2(lines 33 45) no Hoare annotation was computed. [2021-10-16 02:34:31,867 INFO L853 garLoopResultBuilder]: At program point L33-3(lines 33 45) the Hoare annotation is: (let ((.cse0 (bvslt ULTIMATE.start_main_~n~0 (_ bv1000000 32)))) (or (and .cse0 (= ULTIMATE.start_main_~i~0 (_ bv0 32)) (= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0)) (and .cse0 (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (bvsge ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (bvsle ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (not (bvslt ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~n~0))))) [2021-10-16 02:34:31,867 INFO L857 garLoopResultBuilder]: For program point L29(lines 29 32) no Hoare annotation was computed. [2021-10-16 02:34:31,868 INFO L857 garLoopResultBuilder]: For program point L29-1(lines 29 32) no Hoare annotation was computed. [2021-10-16 02:34:31,868 INFO L860 garLoopResultBuilder]: At program point L46(lines 24 48) the Hoare annotation is: true [2021-10-16 02:34:31,868 INFO L853 garLoopResultBuilder]: At program point L34-2(lines 34 44) the Hoare annotation is: (let ((.cse0 (bvslt ULTIMATE.start_main_~n~0 (_ bv1000000 32)))) (or (and .cse0 (= ULTIMATE.start_main_~i~0 (_ bv0 32)) (= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (= ULTIMATE.start_main_~j~0 (_ bv0 32)) (bvslt (_ bv0 32) ULTIMATE.start_main_~n~0)) (let ((.cse1 (bvmul ULTIMATE.start_main_~i~0 (_ bv2 32)))) (and .cse0 (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (bvsge (bvadd ULTIMATE.start_main_~j~0 (_ bv1 32)) .cse1) (bvsge ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (bvsle ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (bvsge ULTIMATE.start_main_~j~0 .cse1))))) [2021-10-16 02:34:31,868 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-16 02:34:31,868 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-16 02:34:31,869 INFO L853 garLoopResultBuilder]: At program point L18-2(lines 1 48) the Hoare annotation is: (let ((.cse0 (bvmul ULTIMATE.start_main_~i~0 (_ bv2 32)))) (and (bvslt ULTIMATE.start_main_~n~0 (_ bv1000000 32)) (bvslt ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (bvsge ULTIMATE.start_main_~j~0 .cse0) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) (bvsge ULTIMATE.start_main_~k~0 .cse0) (bvslt ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~n~0))) [2021-10-16 02:34:31,869 INFO L857 garLoopResultBuilder]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2021-10-16 02:34:31,869 INFO L860 garLoopResultBuilder]: At program point L47(lines 24 48) the Hoare annotation is: true [2021-10-16 02:34:31,869 INFO L853 garLoopResultBuilder]: At program point L18-5(lines 17 22) the Hoare annotation is: (and (bvslt ULTIMATE.start_main_~n~0 (_ bv1000000 32)) (= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (bvsge ULTIMATE.start_main_~j~0 (bvmul ULTIMATE.start_main_~i~0 (_ bv2 32))) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) (bvslt ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~n~0)) [2021-10-16 02:34:31,869 INFO L857 garLoopResultBuilder]: For program point L18-6(lines 18 20) no Hoare annotation was computed. [2021-10-16 02:34:31,870 INFO L853 garLoopResultBuilder]: At program point L18-8(lines 1 48) the Hoare annotation is: (and (bvslt ULTIMATE.start_main_~n~0 (_ bv1000000 32)) (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (bvsge ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (bvsle ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (bvsge ULTIMATE.start_main_~j~0 (bvmul ULTIMATE.start_main_~i~0 (_ bv2 32))) (bvslt ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~n~0)) [2021-10-16 02:34:31,870 INFO L857 garLoopResultBuilder]: For program point L35(lines 35 43) no Hoare annotation was computed. [2021-10-16 02:34:31,874 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:34:31,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:34:31 BoogieIcfgContainer [2021-10-16 02:34:31,917 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:34:31,918 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:34:31,918 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:34:31,918 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:34:31,919 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:33:24" (3/4) ... [2021-10-16 02:34:31,922 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:34:31,933 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-16 02:34:31,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-16 02:34:31,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:34:31,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:34:31,974 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:34:31,974 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:34:31,976 INFO L168 Benchmark]: Toolchain (without parser) took 67718.50 ms. Allocated memory was 60.8 MB in the beginning and 182.5 MB in the end (delta: 121.6 MB). Free memory was 38.8 MB in the beginning and 122.5 MB in the end (delta: -83.6 MB). Peak memory consumption was 38.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:31,977 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 60.8 MB. Free memory was 41.3 MB in the beginning and 41.3 MB in the end (delta: 44.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:34:31,977 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.54 ms. Allocated memory is still 60.8 MB. Free memory was 38.7 MB in the beginning and 43.2 MB in the end (delta: -4.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:31,978 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.93 ms. Allocated memory is still 60.8 MB. Free memory was 43.2 MB in the beginning and 41.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:34:31,978 INFO L168 Benchmark]: Boogie Preprocessor took 23.69 ms. Allocated memory is still 60.8 MB. Free memory was 41.7 MB in the beginning and 40.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:31,978 INFO L168 Benchmark]: RCFGBuilder took 287.58 ms. Allocated memory is still 60.8 MB. Free memory was 40.5 MB in the beginning and 30.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:31,979 INFO L168 Benchmark]: TraceAbstraction took 67022.06 ms. Allocated memory was 60.8 MB in the beginning and 182.5 MB in the end (delta: 121.6 MB). Free memory was 30.0 MB in the beginning and 125.6 MB in the end (delta: -95.6 MB). Peak memory consumption was 109.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:31,979 INFO L168 Benchmark]: Witness Printer took 56.32 ms. Allocated memory is still 182.5 MB. Free memory was 125.6 MB in the beginning and 122.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:31,982 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 60.8 MB. Free memory was 41.3 MB in the beginning and 41.3 MB in the end (delta: 44.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 291.54 ms. Allocated memory is still 60.8 MB. Free memory was 38.7 MB in the beginning and 43.2 MB in the end (delta: -4.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.93 ms. Allocated memory is still 60.8 MB. Free memory was 43.2 MB in the beginning and 41.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.69 ms. Allocated memory is still 60.8 MB. Free memory was 41.7 MB in the beginning and 40.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 287.58 ms. Allocated memory is still 60.8 MB. Free memory was 40.5 MB in the beginning and 30.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 67022.06 ms. Allocated memory was 60.8 MB in the beginning and 182.5 MB in the end (delta: 121.6 MB). Free memory was 30.0 MB in the beginning and 125.6 MB in the end (delta: -95.6 MB). Peak memory consumption was 109.8 MB. Max. memory is 16.1 GB. * Witness Printer took 56.32 ms. Allocated memory is still 182.5 MB. Free memory was 125.6 MB in the beginning and 122.5 MB in the end (delta: 3.1 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: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: 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, 26 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 66906.0ms, OverallIterations: 8, TraceHistogramMax: 3, EmptinessCheckTime: 29.5ms, AutomataDifference: 34368.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 16952.1ms, InitialAbstractionConstructionTime: 25.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 165 SDtfs, 2091 SDslu, 1065 SDs, 0 SdLazy, 3988 SolverSat, 1373 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6331.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1210 GetRequests, 629 SyntacticMatches, 1 SemanticMatches, 580 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23727 ImplicationChecksByTransitivity, 28836.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=6, InterpolantAutomatonStates: 523, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 232.0ms AutomataMinimizationTime, 8 MinimizatonAttempts, 898 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 227 NumberOfFragments, 215 HoareAnnotationTreeSize, 8 FomulaSimplifications, 61914418 FormulaSimplificationTreeSizeReduction, 2998.7ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 591279 FormulaSimplificationTreeSizeReductionInter, 13941.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 130.8ms SsaConstructionTime, 437.5ms SatisfiabilityAnalysisTime, 7723.1ms InterpolantComputationTime, 386 NumberOfCodeBlocks, 386 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 734 ConstructedInterpolants, 1 QuantifiedInterpolants, 3974 SizeOfPredicates, 88 NumberOfNonLiveVariables, 870 ConjunctsInSsa, 157 ConjunctsInUnsatCore, 38 InterpolantComputations, 6 PerfectInterpolantSequences, 98/290 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((~bvslt32(n, 1000000bv32) && k == n) && ~bvsge32(j, ~bvmul32(i, 2bv32))) && cond == 1bv32) && ~bvslt32(j, n) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: ((((~bvslt32(n, 1000000bv32) && ~bvslt32(k, n)) && ~bvsge32(j, ~bvmul32(i, 2bv32))) && cond == 1bv32) && ~bvsge32(k, ~bvmul32(i, 2bv32))) && ~bvslt32(j, n) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((~bvslt32(n, 1000000bv32) && i == 0bv32) && k == n) || ((((~bvslt32(n, 1000000bv32) && !(cond == 0bv32)) && ~bvsge32(k, n)) && ~bvsle32(k, n)) && !~bvslt32(j, n)) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: ((((~bvslt32(n, 1000000bv32) && !(cond == 0bv32)) && ~bvsge32(k, n)) && ~bvsle32(k, n)) && ~bvsge32(j, ~bvmul32(i, 2bv32))) && ~bvslt32(j, n) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((~bvslt32(n, 1000000bv32) && i == 0bv32) && k == n) && j == 0bv32) && ~bvslt32(0bv32, n)) || (((((~bvslt32(n, 1000000bv32) && !(cond == 0bv32)) && ~bvsge32(~bvadd64(j, 1bv32), ~bvmul32(i, 2bv32))) && ~bvsge32(k, n)) && ~bvsle32(k, n)) && ~bvsge32(j, ~bvmul32(i, 2bv32))) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((((~bvslt32(n, 1000000bv32) && !(cond == 0bv32)) && ~bvslt32(k, n)) && (!~bvslt32(~bvadd64(j, 1bv32), n) || ~bvslt32(~bvadd64(k, 1bv32), n))) && ~bvsge32(j, ~bvmul32(i, 2bv32))) && ~bvsge32(k, ~bvmul32(i, 2bv32))) && ~bvslt32(j, n)) || (((((~bvslt32(n, 1000000bv32) && ~bvsle32(k, n)) && ~bvsge32(j, ~bvmul32(i, 2bv32))) && cond == 1bv32) && ~bvsge32(k, ~bvmul32(i, 2bv32))) && ~bvslt32(j, n))) || ((((~bvslt32(n, 1000000bv32) && i == 0bv32) && j == 0bv32) && ~bvslt32(0bv32, n)) && k == ~bvmul32(2bv32, i)) RESULT: Ultimate proved your program to be correct! [2021-10-16 02:34:32,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1674a559-6ba4-4cca-aeb5-95a49ae72899/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...