./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gj2007b.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_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/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_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007b.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/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_3d587c14-1734-467b-aafd-32a842ecbb99/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 d6c7a19e50bb32a5896b861b4b348ab0b4232809 ........................................................................................................................................................................................................................................................................................................................................................ 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_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/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_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007b.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/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_3d587c14-1734-467b-aafd-32a842ecbb99/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 d6c7a19e50bb32a5896b861b4b348ab0b4232809 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:21:04,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:21:04,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:21:04,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:21:04,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:21:04,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:21:04,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:21:04,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:21:04,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:21:04,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:21:04,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:21:04,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:21:04,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:21:04,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:21:04,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:21:04,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:21:04,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:21:04,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:21:04,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:21:04,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:21:04,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:21:04,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:21:04,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:21:04,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:21:04,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:21:04,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:21:04,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:21:04,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:21:04,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:21:04,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:21:04,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:21:04,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:21:04,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:21:04,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:21:04,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:21:04,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:21:04,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:21:04,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:21:04,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:21:04,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:21:04,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:21:04,117 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:21:04,141 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:21:04,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:21:04,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:21:04,143 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:21:04,144 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:21:04,144 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:21:04,145 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:21:04,145 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:21:04,145 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:21:04,146 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:21:04,146 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:21:04,146 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:21:04,147 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:21:04,147 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:21:04,148 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:21:04,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:21:04,149 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:21:04,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:21:04,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:21:04,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:21:04,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:21:04,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:21:04,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:21:04,152 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:21:04,152 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:21:04,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:21:04,153 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:21:04,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:21:04,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:21:04,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:21:04,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:21:04,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:21:04,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:21:04,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:21:04,155 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:21:04,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:21:04,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:21:04,156 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:21:04,156 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:21:04,156 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_3d587c14-1734-467b-aafd-32a842ecbb99/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6c7a19e50bb32a5896b861b4b348ab0b4232809 [2021-10-16 02:21:04,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:21:04,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:21:04,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:21:04,426 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:21:04,427 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:21:04,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-lit/gj2007b.i [2021-10-16 02:21:04,496 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/data/77ac2e4c9/3d616ac8ef914e62b7845dfc85bad8bc/FLAG240368fce [2021-10-16 02:21:05,055 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:21:05,056 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/sv-benchmarks/c/loop-lit/gj2007b.i [2021-10-16 02:21:05,070 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/data/77ac2e4c9/3d616ac8ef914e62b7845dfc85bad8bc/FLAG240368fce [2021-10-16 02:21:05,393 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/data/77ac2e4c9/3d616ac8ef914e62b7845dfc85bad8bc [2021-10-16 02:21:05,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:21:05,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:21:05,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:21:05,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:21:05,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:21:05,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:21:05" (1/1) ... [2021-10-16 02:21:05,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c791bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:05, skipping insertion in model container [2021-10-16 02:21:05,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:21:05" (1/1) ... [2021-10-16 02:21:05,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:21:05,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:21:05,649 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_3d587c14-1734-467b-aafd-32a842ecbb99/sv-benchmarks/c/loop-lit/gj2007b.i[895,908] [2021-10-16 02:21:05,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:21:05,686 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:21:05,699 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_3d587c14-1734-467b-aafd-32a842ecbb99/sv-benchmarks/c/loop-lit/gj2007b.i[895,908] [2021-10-16 02:21:05,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:21:05,722 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:21:05,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:05 WrapperNode [2021-10-16 02:21:05,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:21:05,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:21:05,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:21:05,725 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:21:05,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:05" (1/1) ... [2021-10-16 02:21:05,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:05" (1/1) ... [2021-10-16 02:21:05,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:21:05,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:21:05,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:21:05,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:21:05,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:05" (1/1) ... [2021-10-16 02:21:05,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:05" (1/1) ... [2021-10-16 02:21:05,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:05" (1/1) ... [2021-10-16 02:21:05,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:05" (1/1) ... [2021-10-16 02:21:05,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:05" (1/1) ... [2021-10-16 02:21:05,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:05" (1/1) ... [2021-10-16 02:21:05,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:05" (1/1) ... [2021-10-16 02:21:05,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:21:05,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:21:05,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:21:05,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:21:05,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:05" (1/1) ... [2021-10-16 02:21:05,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:21:05,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:21:05,843 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:21:05,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:21:05,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:21:05,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:21:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:21:05,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:21:06,201 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:21:06,201 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-16 02:21:06,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:21:06 BoogieIcfgContainer [2021-10-16 02:21:06,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:21:06,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:21:06,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:21:06,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:21:06,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:21:05" (1/3) ... [2021-10-16 02:21:06,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f9d3ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:21:06, skipping insertion in model container [2021-10-16 02:21:06,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:05" (2/3) ... [2021-10-16 02:21:06,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f9d3ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:21:06, skipping insertion in model container [2021-10-16 02:21:06,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:21:06" (3/3) ... [2021-10-16 02:21:06,226 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2021-10-16 02:21:06,231 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:21:06,231 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 02:21:06,303 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:21:06,312 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 02:21:06,313 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-16 02:21:06,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 8 states have (on average 1.625) internal successors, (13), 10 states have internal predecessors, (13), 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 02:21:06,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:21:06,333 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:06,334 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:21:06,335 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:21:06,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:06,350 INFO L82 PathProgramCache]: Analyzing trace with hash 2436937, now seen corresponding path program 1 times [2021-10-16 02:21:06,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:21:06,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540060521] [2021-10-16 02:21:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:06,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:21:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:06,639 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 02:21:06,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:21:06,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540060521] [2021-10-16 02:21:06,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540060521] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:21:06,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:21:06,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:21:06,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235826188] [2021-10-16 02:21:06,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:21:06,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:21:06,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:21:06,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:21:06,674 INFO L87 Difference]: Start difference. First operand has 11 states, 8 states have (on average 1.625) internal successors, (13), 10 states have internal predecessors, (13), 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 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:06,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:06,738 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-10-16 02:21:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:21:06,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-16 02:21:06,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:06,748 INFO L225 Difference]: With dead ends: 27 [2021-10-16 02:21:06,749 INFO L226 Difference]: Without dead ends: 15 [2021-10-16 02:21:06,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:21:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-16 02:21:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2021-10-16 02:21:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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 02:21:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-16 02:21:06,789 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 4 [2021-10-16 02:21:06,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:06,790 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-16 02:21:06,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:06,791 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-16 02:21:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:21:06,791 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:06,792 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:21:06,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:21:06,792 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:21:06,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:06,796 INFO L82 PathProgramCache]: Analyzing trace with hash 75514260, now seen corresponding path program 1 times [2021-10-16 02:21:06,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:21:06,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508334054] [2021-10-16 02:21:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:06,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:21:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:06,915 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:21:06,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508334054] [2021-10-16 02:21:06,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508334054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:21:06,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986977941] [2021-10-16 02:21:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:06,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:21:06,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:21:06,921 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:21:06,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:21:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:06,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:21:06,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:07,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:07,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986977941] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:07,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1811177142] [2021-10-16 02:21:07,303 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-16 02:21:07,303 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:21:07,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:21:07,318 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:21:07,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:21:07,352 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:21:07,355 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:21:07,357 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:21:07,358 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-16 02:21:07,360 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:21:07,362 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:21:07,363 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 02:21:07,366 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-10-16 02:21:07,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:07,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:07,458 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-16 02:21:07,458 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 02:21:07,459 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:21:07,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 02:21:07,463 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:21:07,463 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 02:21:07,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:21:07,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:21:07,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:21:07,503 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:21:07,505 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-16 02:21:07,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:21:07,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:100, output treesize:88 [2021-10-16 02:21:07,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:07,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:21:07,709 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 02:21:07,713 INFO L168 Benchmark]: Toolchain (without parser) took 2314.98 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 79.3 MB in the beginning and 110.5 MB in the end (delta: -31.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:21:07,714 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 119.5 MB. Free memory is still 95.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:21:07,714 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.86 ms. Allocated memory is still 119.5 MB. Free memory was 79.1 MB in the beginning and 93.7 MB in the end (delta: -14.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:07,715 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.35 ms. Allocated memory is still 119.5 MB. Free memory was 93.7 MB in the beginning and 92.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:07,715 INFO L168 Benchmark]: Boogie Preprocessor took 34.97 ms. Allocated memory is still 119.5 MB. Free memory was 92.4 MB in the beginning and 91.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:21:07,716 INFO L168 Benchmark]: RCFGBuilder took 408.08 ms. Allocated memory is still 119.5 MB. Free memory was 91.4 MB in the beginning and 80.2 MB in the end (delta: 11.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:07,717 INFO L168 Benchmark]: TraceAbstraction took 1506.62 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 79.8 MB in the beginning and 110.5 MB in the end (delta: -30.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:21:07,725 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 119.5 MB. Free memory is still 95.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 323.86 ms. Allocated memory is still 119.5 MB. Free memory was 79.1 MB in the beginning and 93.7 MB in the end (delta: -14.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.35 ms. Allocated memory is still 119.5 MB. Free memory was 93.7 MB in the beginning and 92.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.97 ms. Allocated memory is still 119.5 MB. Free memory was 92.4 MB in the beginning and 91.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 408.08 ms. Allocated memory is still 119.5 MB. Free memory was 91.4 MB in the beginning and 80.2 MB in the end (delta: 11.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1506.62 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 79.8 MB in the beginning and 110.5 MB in the end (delta: -30.6 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 02:21:07,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/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 02:21:10,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:21:10,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:21:10,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:21:10,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:21:10,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:21:10,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:21:10,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:21:10,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:21:10,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:21:10,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:21:10,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:21:10,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:21:10,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:21:10,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:21:10,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:21:10,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:21:10,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:21:10,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:21:10,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:21:10,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:21:10,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:21:10,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:21:10,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:21:10,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:21:10,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:21:10,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:21:10,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:21:10,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:21:10,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:21:10,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:21:10,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:21:10,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:21:10,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:21:10,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:21:10,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:21:10,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:21:10,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:21:10,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:21:10,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:21:10,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:21:10,433 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:21:10,488 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:21:10,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:21:10,490 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:21:10,491 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:21:10,491 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:21:10,491 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:21:10,492 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:21:10,492 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:21:10,492 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:21:10,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:21:10,495 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:21:10,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:21:10,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:21:10,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:21:10,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:21:10,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:21:10,497 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:21:10,497 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:21:10,497 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:21:10,497 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:21:10,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:21:10,498 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:21:10,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:21:10,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:21:10,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:21:10,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:21:10,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:21:10,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:21:10,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:21:10,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:21:10,500 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:21:10,501 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:21:10,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:21:10,501 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:21:10,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:21:10,502 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_3d587c14-1734-467b-aafd-32a842ecbb99/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6c7a19e50bb32a5896b861b4b348ab0b4232809 [2021-10-16 02:21:10,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:21:10,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:21:10,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:21:10,964 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:21:10,964 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:21:10,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-lit/gj2007b.i [2021-10-16 02:21:11,035 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/data/4c3585689/ab4299da1356481f9a7fecc3607a4389/FLAG751dc2571 [2021-10-16 02:21:11,607 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:21:11,607 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/sv-benchmarks/c/loop-lit/gj2007b.i [2021-10-16 02:21:11,617 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/data/4c3585689/ab4299da1356481f9a7fecc3607a4389/FLAG751dc2571 [2021-10-16 02:21:11,971 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/data/4c3585689/ab4299da1356481f9a7fecc3607a4389 [2021-10-16 02:21:11,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:21:11,975 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:21:11,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:21:11,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:21:11,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:21:11,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:21:11" (1/1) ... [2021-10-16 02:21:11,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71228998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:11, skipping insertion in model container [2021-10-16 02:21:11,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:21:11" (1/1) ... [2021-10-16 02:21:11,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:21:12,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:21:12,141 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_3d587c14-1734-467b-aafd-32a842ecbb99/sv-benchmarks/c/loop-lit/gj2007b.i[895,908] [2021-10-16 02:21:12,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:21:12,166 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:21:12,180 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_3d587c14-1734-467b-aafd-32a842ecbb99/sv-benchmarks/c/loop-lit/gj2007b.i[895,908] [2021-10-16 02:21:12,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:21:12,234 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:21:12,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:12 WrapperNode [2021-10-16 02:21:12,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:21:12,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:21:12,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:21:12,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:21:12,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:12" (1/1) ... [2021-10-16 02:21:12,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:12" (1/1) ... [2021-10-16 02:21:12,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:21:12,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:21:12,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:21:12,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:21:12,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:12" (1/1) ... [2021-10-16 02:21:12,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:12" (1/1) ... [2021-10-16 02:21:12,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:12" (1/1) ... [2021-10-16 02:21:12,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:12" (1/1) ... [2021-10-16 02:21:12,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:12" (1/1) ... [2021-10-16 02:21:12,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:12" (1/1) ... [2021-10-16 02:21:12,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:12" (1/1) ... [2021-10-16 02:21:12,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:21:12,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:21:12,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:21:12,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:21:12,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:12" (1/1) ... [2021-10-16 02:21:12,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:21:12,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:21:12,361 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:21:12,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:21:12,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:21:12,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:21:12,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:21:12,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:21:12,675 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:21:12,695 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-16 02:21:12,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:21:12 BoogieIcfgContainer [2021-10-16 02:21:12,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:21:12,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:21:12,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:21:12,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:21:12,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:21:11" (1/3) ... [2021-10-16 02:21:12,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae5445c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:21:12, skipping insertion in model container [2021-10-16 02:21:12,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:12" (2/3) ... [2021-10-16 02:21:12,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae5445c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:21:12, skipping insertion in model container [2021-10-16 02:21:12,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:21:12" (3/3) ... [2021-10-16 02:21:12,707 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2021-10-16 02:21:12,712 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:21:12,727 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 02:21:12,812 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:21:12,827 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 02:21:12,828 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-16 02:21:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:12,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:21:12,867 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:12,867 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:21:12,868 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:21:12,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:12,879 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-10-16 02:21:12,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:21:12,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097536511] [2021-10-16 02:21:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:12,895 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:21:12,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:21:12,899 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:21:12,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:21:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:12,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:21:12,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:13,051 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 02:21:13,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:13,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:21:13,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097536511] [2021-10-16 02:21:13,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097536511] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:21:13,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:21:13,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:21:13,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562126217] [2021-10-16 02:21:13,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:21:13,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:21:13,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:21:13,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:21:13,108 INFO L87 Difference]: Start difference. First operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:13,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:13,123 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-10-16 02:21:13,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:21:13,125 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:21:13,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:13,134 INFO L225 Difference]: With dead ends: 29 [2021-10-16 02:21:13,135 INFO L226 Difference]: Without dead ends: 13 [2021-10-16 02:21:13,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:21:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-16 02:21:13,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-16 02:21:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-16 02:21:13,171 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 6 [2021-10-16 02:21:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:13,172 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-16 02:21:13,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:13,172 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-16 02:21:13,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:21:13,173 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:13,174 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:21:13,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:13,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:21:13,380 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:21:13,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:13,386 INFO L82 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-10-16 02:21:13,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:21:13,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920513991] [2021-10-16 02:21:13,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:13,390 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:21:13,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:21:13,391 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:21:13,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:21:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:13,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:21:13,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:13,556 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 02:21:13,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:13,618 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 02:21:13,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:21:13,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920513991] [2021-10-16 02:21:13,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920513991] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:21:13,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:21:13,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:21:13,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058519160] [2021-10-16 02:21:13,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:21:13,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:21:13,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:21:13,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:21:13,623 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 02:21:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:13,664 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-10-16 02:21:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:21:13,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 6 [2021-10-16 02:21:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:13,665 INFO L225 Difference]: With dead ends: 24 [2021-10-16 02:21:13,665 INFO L226 Difference]: Without dead ends: 16 [2021-10-16 02:21:13,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:21:13,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-16 02:21:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-16 02:21:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-10-16 02:21:13,687 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 6 [2021-10-16 02:21:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:13,688 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-16 02:21:13,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 02:21:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-10-16 02:21:13,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:21:13,689 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:13,689 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:21:13,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:13,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:21:13,901 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:21:13,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:13,906 INFO L82 PathProgramCache]: Analyzing trace with hash 584467323, now seen corresponding path program 1 times [2021-10-16 02:21:13,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:21:13,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869310513] [2021-10-16 02:21:13,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:13,908 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:21:13,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:21:13,909 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:21:13,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:21:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:13,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:21:13,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:14,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:14,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:21:14,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869310513] [2021-10-16 02:21:14,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869310513] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:14,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1236774909] [2021-10-16 02:21:14,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:14,202 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:21:14,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:21:14,208 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:21:14,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-16 02:21:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:14,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:21:14,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:14,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:14,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1236774909] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:14,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881804012] [2021-10-16 02:21:14,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:14,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:21:14,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:21:14,393 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:21:14,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-16 02:21:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:14,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:21:14,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:14,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:14,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881804012] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:14,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:21:14,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-16 02:21:14,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913565019] [2021-10-16 02:21:14,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:21:14,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:21:14,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:21:14,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:21:14,590 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:14,781 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2021-10-16 02:21:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:21:14,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-16 02:21:14,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:14,786 INFO L225 Difference]: With dead ends: 51 [2021-10-16 02:21:14,787 INFO L226 Difference]: Without dead ends: 39 [2021-10-16 02:21:14,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:21:14,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-16 02:21:14,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-10-16 02:21:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 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 02:21:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-16 02:21:14,801 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 9 [2021-10-16 02:21:14,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:14,802 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-16 02:21:14,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-16 02:21:14,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 02:21:14,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:14,803 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:21:14,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-16 02:21:15,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:15,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:15,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:21:15,422 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:21:15,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:15,423 INFO L82 PathProgramCache]: Analyzing trace with hash -586556265, now seen corresponding path program 1 times [2021-10-16 02:21:15,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:21:15,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828918128] [2021-10-16 02:21:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:15,424 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:21:15,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:21:15,425 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:21:15,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:21:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:15,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:21:15,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:15,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:16,107 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:21:16,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828918128] [2021-10-16 02:21:16,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828918128] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:21:16,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:21:16,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-10-16 02:21:16,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767433866] [2021-10-16 02:21:16,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:21:16,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:21:16,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:21:16,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:21:16,110 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:16,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:16,401 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-10-16 02:21:16,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:21:16,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-16 02:21:16,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:16,403 INFO L225 Difference]: With dead ends: 46 [2021-10-16 02:21:16,403 INFO L226 Difference]: Without dead ends: 40 [2021-10-16 02:21:16,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 434.5ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-16 02:21:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-16 02:21:16,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2021-10-16 02:21:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.3) internal successors, (39), 31 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 02:21:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-10-16 02:21:16,409 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 14 [2021-10-16 02:21:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:16,409 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-10-16 02:21:16,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-10-16 02:21:16,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:21:16,410 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:16,410 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:21:16,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:16,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:21:16,611 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:21:16,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:16,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1210846427, now seen corresponding path program 1 times [2021-10-16 02:21:16,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:21:16,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533645015] [2021-10-16 02:21:16,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:16,613 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:21:16,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:21:16,618 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:21:16,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:21:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:16,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:21:16,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:16,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:16,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:21:16,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533645015] [2021-10-16 02:21:16,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533645015] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:16,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1028391498] [2021-10-16 02:21:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:16,911 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:21:16,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:21:16,916 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:21:16,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-16 02:21:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:17,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:21:17,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:17,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:17,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1028391498] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:17,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834153774] [2021-10-16 02:21:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:17,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:21:17,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:21:17,170 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:21:17,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-16 02:21:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:17,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:21:17,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:17,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 02:21:17,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834153774] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:21:17,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:21:17,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 7, 7, 10] total 21 [2021-10-16 02:21:17,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258910978] [2021-10-16 02:21:17,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:21:17,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:21:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:21:17,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-10-16 02:21:17,694 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:17,832 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2021-10-16 02:21:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:21:17,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-16 02:21:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:17,834 INFO L225 Difference]: With dead ends: 40 [2021-10-16 02:21:17,834 INFO L226 Difference]: Without dead ends: 36 [2021-10-16 02:21:17,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 354.2ms TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-10-16 02:21:17,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-16 02:21:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-10-16 02:21:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 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 02:21:17,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-10-16 02:21:17,840 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2021-10-16 02:21:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:17,840 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-10-16 02:21:17,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-10-16 02:21:17,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 02:21:17,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:17,841 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:21:17,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-16 02:21:18,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:18,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:18,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:21:18,453 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:21:18,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:18,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1822976198, now seen corresponding path program 2 times [2021-10-16 02:21:18,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:21:18,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786947059] [2021-10-16 02:21:18,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:21:18,455 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:21:18,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:21:18,458 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:21:18,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:21:18,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:21:18,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:21:18,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:21:18,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:18,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:19,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:21:19,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786947059] [2021-10-16 02:21:19,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786947059] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:19,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [837126472] [2021-10-16 02:21:19,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:21:19,269 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:21:19,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:21:19,272 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:21:19,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-16 02:21:19,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:21:19,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:21:19,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:21:19,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:21:19,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:21:19,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [837126472] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:19,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658541634] [2021-10-16 02:21:19,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:21:19,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:21:19,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:21:19,755 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:21:19,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-16 02:21:19,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:21:19,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:21:19,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:21:19,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:21:20,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:21:20,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658541634] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:20,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:21:20,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7, 5, 9, 6] total 23 [2021-10-16 02:21:20,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211389166] [2021-10-16 02:21:20,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-16 02:21:20,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:21:20,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-16 02:21:20,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-10-16 02:21:20,248 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 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 02:21:20,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:20,740 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-10-16 02:21:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 02:21:20,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 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 02:21:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:20,745 INFO L225 Difference]: With dead ends: 42 [2021-10-16 02:21:20,745 INFO L226 Difference]: Without dead ends: 30 [2021-10-16 02:21:20,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 803.3ms TimeCoverageRelationStatistics Valid=261, Invalid=929, Unknown=0, NotChecked=0, Total=1190 [2021-10-16 02:21:20,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-16 02:21:20,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 19. [2021-10-16 02:21:20,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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 02:21:20,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-16 02:21:20,751 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 17 [2021-10-16 02:21:20,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:20,751 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-16 02:21:20,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 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 02:21:20,752 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-16 02:21:20,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:21:20,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:20,753 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:21:20,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:20,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:21,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:21,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:21:21,360 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:21:21,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:21,361 INFO L82 PathProgramCache]: Analyzing trace with hash 491841168, now seen corresponding path program 2 times [2021-10-16 02:21:21,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:21:21,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499213977] [2021-10-16 02:21:21,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:21:21,361 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:21:21,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:21:21,362 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:21:21,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-16 02:21:21,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:21:21,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:21:21,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:21:21,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:21:21,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:21:21,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:21:21,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499213977] [2021-10-16 02:21:21,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499213977] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:21,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [293514699] [2021-10-16 02:21:21,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:21:21,722 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:21:21,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:21:21,723 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:21:21,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-16 02:21:21,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:21:21,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:21:21,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:21:21,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:21:22,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:21:22,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [293514699] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:22,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026437332] [2021-10-16 02:21:22,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:21:22,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:21:22,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:21:22,112 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:21:22,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-16 02:21:22,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:21:22,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:21:22,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:21:22,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:21:22,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:21:22,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026437332] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:22,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:21:22,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-10-16 02:21:22,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006360368] [2021-10-16 02:21:22,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 02:21:22,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:21:22,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 02:21:22,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:21:22,474 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 02:21:22,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:22,791 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-10-16 02:21:22,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 02:21:22,792 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 18 [2021-10-16 02:21:22,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:22,793 INFO L225 Difference]: With dead ends: 41 [2021-10-16 02:21:22,793 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:21:22,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 287.4ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-10-16 02:21:22,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:21:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:21:22,794 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 02:21:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:21:22,795 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-10-16 02:21:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:22,795 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:21:22,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 02:21:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:21:22,795 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:21:22,798 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:21:22,798 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:21:22,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:23,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:23,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-16 02:21:23,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:21:23,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:21:23,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:21:23,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:21:23,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:21:23,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:21:23,633 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:21:23,633 INFO L857 garLoopResultBuilder]: For program point L29(lines 29 31) no Hoare annotation was computed. [2021-10-16 02:21:23,633 INFO L857 garLoopResultBuilder]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2021-10-16 02:21:23,633 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-16 02:21:23,633 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-16 02:21:23,633 INFO L857 garLoopResultBuilder]: For program point L19-1(line 19) no Hoare annotation was computed. [2021-10-16 02:21:23,633 INFO L860 garLoopResultBuilder]: At program point L36(lines 24 37) the Hoare annotation is: true [2021-10-16 02:21:23,634 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-16 02:21:23,634 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:21:23,634 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-16 02:21:23,634 INFO L853 garLoopResultBuilder]: At program point L28-2(lines 28 33) the Hoare annotation is: (and (bvsge ULTIMATE.start_main_~x~0 (_ bv0 32)) (or (bvslt ULTIMATE.start_main_~m~0 ULTIMATE.start_main_~n~0) (bvsle ULTIMATE.start_main_~n~0 (_ bv0 32))) (bvsge ULTIMATE.start_main_~m~0 (_ bv0 32))) [2021-10-16 02:21:23,634 INFO L857 garLoopResultBuilder]: For program point L28-3(lines 28 33) no Hoare annotation was computed. [2021-10-16 02:21:23,634 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-16 02:21:23,634 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-16 02:21:23,634 INFO L853 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: (and (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (or (bvslt ULTIMATE.start_main_~m~0 ULTIMATE.start_main_~n~0) (bvsle ULTIMATE.start_main_~n~0 (_ bv0 32)))) [2021-10-16 02:21:23,634 INFO L857 garLoopResultBuilder]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2021-10-16 02:21:23,635 INFO L860 garLoopResultBuilder]: At program point L18-5(lines 17 22) the Hoare annotation is: true [2021-10-16 02:21:23,639 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:21:23,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:21:23 BoogieIcfgContainer [2021-10-16 02:21:23,654 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:21:23,655 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:21:23,655 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:21:23,655 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:21:23,656 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:21:12" (3/4) ... [2021-10-16 02:21:23,665 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:21:23,676 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-16 02:21:23,677 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-16 02:21:23,677 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:21:23,677 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:21:23,720 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:21:23,720 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:21:23,722 INFO L168 Benchmark]: Toolchain (without parser) took 11745.64 ms. Allocated memory was 58.7 MB in the beginning and 111.1 MB in the end (delta: 52.4 MB). Free memory was 36.6 MB in the beginning and 52.5 MB in the end (delta: -15.9 MB). Peak memory consumption was 35.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:23,723 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 58.7 MB. Free memory is still 39.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:21:23,723 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.36 ms. Allocated memory was 58.7 MB in the beginning and 75.5 MB in the end (delta: 16.8 MB). Free memory was 36.4 MB in the beginning and 59.3 MB in the end (delta: -22.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:23,724 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.94 ms. Allocated memory is still 75.5 MB. Free memory was 59.1 MB in the beginning and 57.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:21:23,724 INFO L168 Benchmark]: Boogie Preprocessor took 24.12 ms. Allocated memory is still 75.5 MB. Free memory was 57.8 MB in the beginning and 56.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:21:23,724 INFO L168 Benchmark]: RCFGBuilder took 372.79 ms. Allocated memory is still 75.5 MB. Free memory was 56.6 MB in the beginning and 47.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:23,725 INFO L168 Benchmark]: TraceAbstraction took 10954.35 ms. Allocated memory was 75.5 MB in the beginning and 111.1 MB in the end (delta: 35.7 MB). Free memory was 46.9 MB in the beginning and 54.9 MB in the end (delta: -8.0 MB). Peak memory consumption was 28.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:23,725 INFO L168 Benchmark]: Witness Printer took 65.84 ms. Allocated memory is still 111.1 MB. Free memory was 54.9 MB in the beginning and 52.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:23,727 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 58.7 MB. Free memory is still 39.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 273.36 ms. Allocated memory was 58.7 MB in the beginning and 75.5 MB in the end (delta: 16.8 MB). Free memory was 36.4 MB in the beginning and 59.3 MB in the end (delta: -22.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.94 ms. Allocated memory is still 75.5 MB. Free memory was 59.1 MB in the beginning and 57.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.12 ms. Allocated memory is still 75.5 MB. Free memory was 57.8 MB in the beginning and 56.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 372.79 ms. Allocated memory is still 75.5 MB. Free memory was 56.6 MB in the beginning and 47.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10954.35 ms. Allocated memory was 75.5 MB in the beginning and 111.1 MB in the end (delta: 35.7 MB). Free memory was 46.9 MB in the beginning and 54.9 MB in the end (delta: -8.0 MB). Peak memory consumption was 28.2 MB. Max. memory is 16.1 GB. * Witness Printer took 65.84 ms. Allocated memory is still 111.1 MB. Free memory was 54.9 MB in the beginning and 52.5 MB in the end (delta: 2.4 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 10828.2ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 29.7ms, AutomataDifference: 1548.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 233.2ms, InitialAbstractionConstructionTime: 12.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 69 SDtfs, 139 SDslu, 180 SDs, 0 SdLazy, 329 SolverSat, 101 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 421.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 416 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 2038.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=4, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 65.3ms AutomataMinimizationTime, 7 MinimizatonAttempts, 38 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 23 NumberOfFragments, 28 HoareAnnotationTreeSize, 4 FomulaSimplifications, 727 FormulaSimplificationTreeSizeReduction, 137.3ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 118 FormulaSimplificationTreeSizeReductionInter, 90.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 101.2ms SsaConstructionTime, 283.4ms SatisfiabilityAnalysisTime, 3832.8ms InterpolantComputationTime, 203 NumberOfCodeBlocks, 203 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 376 ConstructedInterpolants, 0 QuantifiedInterpolants, 1482 SizeOfPredicates, 70 NumberOfNonLiveVariables, 505 ConjunctsInSsa, 108 ConjunctsInUnsatCore, 30 InterpolantComputations, 6 PerfectInterpolantSequences, 64/292 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 2 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: !(cond == 0bv32) && (~bvslt32(m, n) || ~bvsle32(n, 0bv32)) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (~bvsge32(x, 0bv32) && (~bvslt32(m, n) || ~bvsle32(n, 0bv32))) && ~bvsge32(m, 0bv32) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-16 02:21:23,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d587c14-1734-467b-aafd-32a842ecbb99/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...