./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI --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 a92f0f2e799b323440c6f0b05c6a9c0af057fa0c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI --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 a92f0f2e799b323440c6f0b05c6a9c0af057fa0c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:30:34,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:30:34,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:30:34,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:30:34,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:30:34,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:30:34,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:30:34,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:30:34,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:30:34,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:30:34,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:30:34,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:30:34,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:30:34,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:30:34,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:30:34,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:30:34,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:30:34,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:30:34,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:30:34,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:30:34,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:30:34,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:30:34,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:30:34,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:30:34,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:30:34,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:30:34,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:30:34,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:30:34,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:30:34,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:30:34,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:30:34,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:30:34,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:30:34,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:30:34,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:30:34,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:30:34,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:30:34,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:30:34,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:30:34,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:30:34,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:30:34,808 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:30:34,836 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:30:34,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:30:34,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:30:34,846 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:30:34,846 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:30:34,847 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:30:34,847 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:30:34,847 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:30:34,847 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:30:34,848 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:30:34,848 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:30:34,852 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:30:34,852 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:30:34,852 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:30:34,853 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:30:34,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:30:34,854 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:30:34,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:30:34,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:30:34,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:30:34,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:30:34,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:30:34,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:30:34,855 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:30:34,855 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:30:34,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:30:34,856 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:30:34,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:30:34,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:30:34,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:30:34,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:30:34,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:30:34,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:30:34,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:30:34,860 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:30:34,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:30:34,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:30:34,862 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:30:34,862 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:30:34,862 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_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a92f0f2e799b323440c6f0b05c6a9c0af057fa0c [2021-10-11 02:30:35,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:30:35,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:30:35,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:30:35,162 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:30:35,163 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:30:35,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2021-10-11 02:30:35,238 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/data/dae534e28/ac1269804b29402495ac58b5cb6f8465/FLAG80071dde9 [2021-10-11 02:30:35,744 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:30:35,744 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2021-10-11 02:30:35,755 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/data/dae534e28/ac1269804b29402495ac58b5cb6f8465/FLAG80071dde9 [2021-10-11 02:30:36,100 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/data/dae534e28/ac1269804b29402495ac58b5cb6f8465 [2021-10-11 02:30:36,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:30:36,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:30:36,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:36,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:30:36,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:30:36,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:36" (1/1) ... [2021-10-11 02:30:36,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37dd5695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:36, skipping insertion in model container [2021-10-11 02:30:36,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:36" (1/1) ... [2021-10-11 02:30:36,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:30:36,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:30:36,414 WARN L226 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_99015c66-cd1d-478b-bea8-78a0b5894f4c/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2021-10-11 02:30:36,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:30:36,430 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:30:36,483 WARN L226 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_99015c66-cd1d-478b-bea8-78a0b5894f4c/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2021-10-11 02:30:36,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:30:36,499 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:30:36,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:36 WrapperNode [2021-10-11 02:30:36,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:36,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:30:36,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:30:36,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:30:36,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:36" (1/1) ... [2021-10-11 02:30:36,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:36" (1/1) ... [2021-10-11 02:30:36,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:30:36,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:30:36,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:30:36,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:30:36,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:36" (1/1) ... [2021-10-11 02:30:36,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:36" (1/1) ... [2021-10-11 02:30:36,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:36" (1/1) ... [2021-10-11 02:30:36,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:36" (1/1) ... [2021-10-11 02:30:36,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:36" (1/1) ... [2021-10-11 02:30:36,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:36" (1/1) ... [2021-10-11 02:30:36,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:36" (1/1) ... [2021-10-11 02:30:36,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:30:36,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:30:36,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:30:36,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:30:36,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:36" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:30:36,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:30:36,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:30:36,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:30:36,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:30:36,989 WARN L800 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-11 02:30:37,546 INFO L752 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-11 02:30:37,546 INFO L752 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-11 02:30:38,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:30:38,062 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:30:38,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:38 BoogieIcfgContainer [2021-10-11 02:30:38,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:30:38,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:30:38,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:30:38,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:30:38,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:30:36" (1/3) ... [2021-10-11 02:30:38,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f451439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:38, skipping insertion in model container [2021-10-11 02:30:38,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:36" (2/3) ... [2021-10-11 02:30:38,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f451439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:38, skipping insertion in model container [2021-10-11 02:30:38,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:38" (3/3) ... [2021-10-11 02:30:38,077 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_2.BV.c.cil-2a.c [2021-10-11 02:30:38,091 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:30:38,098 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:30:38,109 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:30:38,142 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:30:38,142 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:30:38,143 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:30:38,143 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:30:38,143 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:30:38,143 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:30:38,143 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:30:38,143 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:30:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2021-10-11 02:30:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 02:30:38,164 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:38,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:38,165 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:38,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:38,170 INFO L82 PathProgramCache]: Analyzing trace with hash 353358731, now seen corresponding path program 1 times [2021-10-11 02:30:38,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:38,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36147028] [2021-10-11 02:30:38,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:38,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36147028] [2021-10-11 02:30:38,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:38,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:30:38,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659493572] [2021-10-11 02:30:38,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:38,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:38,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:38,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:38,407 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 3 states. [2021-10-11 02:30:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:38,579 INFO L93 Difference]: Finished difference Result 169 states and 293 transitions. [2021-10-11 02:30:38,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:38,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-10-11 02:30:38,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:38,599 INFO L225 Difference]: With dead ends: 169 [2021-10-11 02:30:38,599 INFO L226 Difference]: Without dead ends: 83 [2021-10-11 02:30:38,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-11 02:30:38,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-10-11 02:30:38,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-10-11 02:30:38,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 120 transitions. [2021-10-11 02:30:38,638 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 120 transitions. Word has length 19 [2021-10-11 02:30:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:38,639 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 120 transitions. [2021-10-11 02:30:38,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:38,639 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 120 transitions. [2021-10-11 02:30:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-11 02:30:38,640 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:38,640 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:38,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:30:38,641 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:38,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:38,642 INFO L82 PathProgramCache]: Analyzing trace with hash 982323864, now seen corresponding path program 1 times [2021-10-11 02:30:38,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:38,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002802591] [2021-10-11 02:30:38,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:38,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002802591] [2021-10-11 02:30:38,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:38,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:38,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436188342] [2021-10-11 02:30:38,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:38,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:38,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:38,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:38,735 INFO L87 Difference]: Start difference. First operand 83 states and 120 transitions. Second operand 3 states. [2021-10-11 02:30:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:38,864 INFO L93 Difference]: Finished difference Result 178 states and 261 transitions. [2021-10-11 02:30:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:38,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2021-10-11 02:30:38,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:38,872 INFO L225 Difference]: With dead ends: 178 [2021-10-11 02:30:38,872 INFO L226 Difference]: Without dead ends: 98 [2021-10-11 02:30:38,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:38,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-11 02:30:38,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-10-11 02:30:38,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-10-11 02:30:38,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 136 transitions. [2021-10-11 02:30:38,897 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 136 transitions. Word has length 28 [2021-10-11 02:30:38,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:38,898 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 136 transitions. [2021-10-11 02:30:38,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 136 transitions. [2021-10-11 02:30:38,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-11 02:30:38,900 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:38,901 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:38,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:30:38,902 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:38,905 INFO L82 PathProgramCache]: Analyzing trace with hash 766773566, now seen corresponding path program 1 times [2021-10-11 02:30:38,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:38,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341131391] [2021-10-11 02:30:38,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:30:39,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341131391] [2021-10-11 02:30:39,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:39,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:39,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766668278] [2021-10-11 02:30:39,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:39,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:39,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:39,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:39,011 INFO L87 Difference]: Start difference. First operand 96 states and 136 transitions. Second operand 3 states. [2021-10-11 02:30:39,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:39,158 INFO L93 Difference]: Finished difference Result 206 states and 297 transitions. [2021-10-11 02:30:39,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:39,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2021-10-11 02:30:39,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:39,168 INFO L225 Difference]: With dead ends: 206 [2021-10-11 02:30:39,168 INFO L226 Difference]: Without dead ends: 113 [2021-10-11 02:30:39,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-11 02:30:39,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-10-11 02:30:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-10-11 02:30:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 154 transitions. [2021-10-11 02:30:39,185 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 154 transitions. Word has length 39 [2021-10-11 02:30:39,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:39,186 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 154 transitions. [2021-10-11 02:30:39,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 154 transitions. [2021-10-11 02:30:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-11 02:30:39,188 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:39,188 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:39,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:30:39,188 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:39,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:39,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1014421384, now seen corresponding path program 1 times [2021-10-11 02:30:39,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:39,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205313175] [2021-10-11 02:30:39,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:30:39,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205313175] [2021-10-11 02:30:39,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027569309] [2021-10-11 02:30:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:30:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:39,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:30:39,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-11 02:30:39,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:30:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-11 02:30:39,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:30:39,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2021-10-11 02:30:39,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313655039] [2021-10-11 02:30:39,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:30:39,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:39,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:30:39,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:30:39,638 INFO L87 Difference]: Start difference. First operand 111 states and 154 transitions. Second operand 6 states. [2021-10-11 02:30:39,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:39,989 INFO L93 Difference]: Finished difference Result 312 states and 467 transitions. [2021-10-11 02:30:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:30:39,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2021-10-11 02:30:39,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:39,991 INFO L225 Difference]: With dead ends: 312 [2021-10-11 02:30:39,991 INFO L226 Difference]: Without dead ends: 203 [2021-10-11 02:30:39,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:30:39,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-11 02:30:40,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2021-10-11 02:30:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-10-11 02:30:40,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 255 transitions. [2021-10-11 02:30:40,004 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 255 transitions. Word has length 52 [2021-10-11 02:30:40,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:40,005 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 255 transitions. [2021-10-11 02:30:40,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:30:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 255 transitions. [2021-10-11 02:30:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-11 02:30:40,007 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:40,008 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:40,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:30:40,234 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:40,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:40,235 INFO L82 PathProgramCache]: Analyzing trace with hash -675369057, now seen corresponding path program 1 times [2021-10-11 02:30:40,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:40,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560257621] [2021-10-11 02:30:40,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-11 02:30:40,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560257621] [2021-10-11 02:30:40,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:40,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:40,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301380762] [2021-10-11 02:30:40,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:40,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:40,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:40,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:40,331 INFO L87 Difference]: Start difference. First operand 186 states and 255 transitions. Second operand 3 states. [2021-10-11 02:30:40,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:40,477 INFO L93 Difference]: Finished difference Result 390 states and 543 transitions. [2021-10-11 02:30:40,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:40,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2021-10-11 02:30:40,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:40,482 INFO L225 Difference]: With dead ends: 390 [2021-10-11 02:30:40,482 INFO L226 Difference]: Without dead ends: 207 [2021-10-11 02:30:40,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-10-11 02:30:40,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2021-10-11 02:30:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2021-10-11 02:30:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 277 transitions. [2021-10-11 02:30:40,500 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 277 transitions. Word has length 67 [2021-10-11 02:30:40,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:40,501 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 277 transitions. [2021-10-11 02:30:40,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 277 transitions. [2021-10-11 02:30:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-11 02:30:40,503 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:40,503 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:40,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:30:40,503 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:40,504 INFO L82 PathProgramCache]: Analyzing trace with hash -861273517, now seen corresponding path program 1 times [2021-10-11 02:30:40,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:40,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061157294] [2021-10-11 02:30:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-11 02:30:40,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061157294] [2021-10-11 02:30:40,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684816633] [2021-10-11 02:30:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:30:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:40,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:30:40,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-11 02:30:40,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:30:40,968 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2021-10-11 02:30:40,968 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:30:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-10-11 02:30:41,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1620085701] [2021-10-11 02:30:41,055 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2021-10-11 02:30:41,056 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:30:41,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:30:41,066 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:30:41,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:30:41,559 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-10-11 02:30:41,848 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-10-11 02:30:42,291 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2021-10-11 02:30:42,748 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 192 [2021-10-11 02:30:43,257 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 181 [2021-10-11 02:30:43,692 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) 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:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2021-10-11 02:30:43,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:30:43,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 7 [2021-10-11 02:30:43,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989718264] [2021-10-11 02:30:43,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:30:43,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:43,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:30:43,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:30:43,697 INFO L87 Difference]: Start difference. First operand 205 states and 277 transitions. Second operand 8 states. [2021-10-11 02:30:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:43,769 INFO L93 Difference]: Finished difference Result 650 states and 874 transitions. [2021-10-11 02:30:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:30:43,770 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2021-10-11 02:30:43,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:43,774 INFO L225 Difference]: With dead ends: 650 [2021-10-11 02:30:43,775 INFO L226 Difference]: Without dead ends: 648 [2021-10-11 02:30:43,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:30:43,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-10-11 02:30:43,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 567. [2021-10-11 02:30:43,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2021-10-11 02:30:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 776 transitions. [2021-10-11 02:30:43,795 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 776 transitions. Word has length 85 [2021-10-11 02:30:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:43,795 INFO L481 AbstractCegarLoop]: Abstraction has 567 states and 776 transitions. [2021-10-11 02:30:43,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:30:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 776 transitions. [2021-10-11 02:30:43,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-10-11 02:30:43,799 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:43,799 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:44,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:30:44,026 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:44,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:44,027 INFO L82 PathProgramCache]: Analyzing trace with hash 181424121, now seen corresponding path program 1 times [2021-10-11 02:30:44,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:44,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546962655] [2021-10-11 02:30:44,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-10-11 02:30:44,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546962655] [2021-10-11 02:30:44,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:44,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:44,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232501542] [2021-10-11 02:30:44,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:44,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:44,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:44,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:44,145 INFO L87 Difference]: Start difference. First operand 567 states and 776 transitions. Second operand 3 states. [2021-10-11 02:30:44,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:44,372 INFO L93 Difference]: Finished difference Result 1262 states and 1784 transitions. [2021-10-11 02:30:44,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:44,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 143 [2021-10-11 02:30:44,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:44,377 INFO L225 Difference]: With dead ends: 1262 [2021-10-11 02:30:44,378 INFO L226 Difference]: Without dead ends: 695 [2021-10-11 02:30:44,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:44,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-10-11 02:30:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 630. [2021-10-11 02:30:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2021-10-11 02:30:44,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 860 transitions. [2021-10-11 02:30:44,403 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 860 transitions. Word has length 143 [2021-10-11 02:30:44,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:44,403 INFO L481 AbstractCegarLoop]: Abstraction has 630 states and 860 transitions. [2021-10-11 02:30:44,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:44,404 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 860 transitions. [2021-10-11 02:30:44,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-10-11 02:30:44,406 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:44,407 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:44,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-10-11 02:30:44,407 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:44,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:44,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1334937798, now seen corresponding path program 2 times [2021-10-11 02:30:44,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:44,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45723377] [2021-10-11 02:30:44,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 282 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-10-11 02:30:44,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45723377] [2021-10-11 02:30:44,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:44,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:44,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169584702] [2021-10-11 02:30:44,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:44,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:44,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:44,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:44,507 INFO L87 Difference]: Start difference. First operand 630 states and 860 transitions. Second operand 3 states. [2021-10-11 02:30:44,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:44,713 INFO L93 Difference]: Finished difference Result 1450 states and 2062 transitions. [2021-10-11 02:30:44,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:44,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 152 [2021-10-11 02:30:44,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:44,718 INFO L225 Difference]: With dead ends: 1450 [2021-10-11 02:30:44,719 INFO L226 Difference]: Without dead ends: 772 [2021-10-11 02:30:44,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:44,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-10-11 02:30:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 744. [2021-10-11 02:30:44,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2021-10-11 02:30:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1004 transitions. [2021-10-11 02:30:44,747 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1004 transitions. Word has length 152 [2021-10-11 02:30:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:44,752 INFO L481 AbstractCegarLoop]: Abstraction has 744 states and 1004 transitions. [2021-10-11 02:30:44,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:44,752 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1004 transitions. [2021-10-11 02:30:44,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-10-11 02:30:44,757 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:44,758 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:44,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-10-11 02:30:44,758 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:44,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:44,759 INFO L82 PathProgramCache]: Analyzing trace with hash -328772088, now seen corresponding path program 1 times [2021-10-11 02:30:44,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:44,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678277959] [2021-10-11 02:30:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-10-11 02:30:44,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678277959] [2021-10-11 02:30:44,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:44,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:44,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197550155] [2021-10-11 02:30:44,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:44,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:44,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:44,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:44,909 INFO L87 Difference]: Start difference. First operand 744 states and 1004 transitions. Second operand 3 states. [2021-10-11 02:30:44,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:44,944 INFO L93 Difference]: Finished difference Result 1227 states and 1658 transitions. [2021-10-11 02:30:44,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:44,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2021-10-11 02:30:44,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:44,950 INFO L225 Difference]: With dead ends: 1227 [2021-10-11 02:30:44,950 INFO L226 Difference]: Without dead ends: 744 [2021-10-11 02:30:44,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:44,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-10-11 02:30:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2021-10-11 02:30:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2021-10-11 02:30:44,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1002 transitions. [2021-10-11 02:30:44,978 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1002 transitions. Word has length 163 [2021-10-11 02:30:44,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:44,978 INFO L481 AbstractCegarLoop]: Abstraction has 744 states and 1002 transitions. [2021-10-11 02:30:44,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:44,978 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1002 transitions. [2021-10-11 02:30:44,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-10-11 02:30:44,981 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:44,982 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:44,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-10-11 02:30:44,982 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:44,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:44,983 INFO L82 PathProgramCache]: Analyzing trace with hash -62901987, now seen corresponding path program 1 times [2021-10-11 02:30:44,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:44,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834221624] [2021-10-11 02:30:44,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:30:45,045 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:30:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:30:45,115 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:30:45,190 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:30:45,191 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:30:45,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-10-11 02:30:45,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:30:45 BoogieIcfgContainer [2021-10-11 02:30:45,321 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:30:45,321 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:30:45,322 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:30:45,322 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:30:45,322 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:38" (3/4) ... [2021-10-11 02:30:45,326 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:30:45,326 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:30:45,327 INFO L168 Benchmark]: Toolchain (without parser) took 9222.45 ms. Allocated memory was 111.1 MB in the beginning and 285.2 MB in the end (delta: 174.1 MB). Free memory was 81.6 MB in the beginning and 204.3 MB in the end (delta: -122.8 MB). Peak memory consumption was 51.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:45,328 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 111.1 MB. Free memory is still 65.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:30:45,328 INFO L168 Benchmark]: CACSL2BoogieTranslator took 391.87 ms. Allocated memory is still 111.1 MB. Free memory was 81.3 MB in the beginning and 81.8 MB in the end (delta: -577.4 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:45,329 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.61 ms. Allocated memory is still 111.1 MB. Free memory was 81.8 MB in the beginning and 79.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:45,329 INFO L168 Benchmark]: Boogie Preprocessor took 54.04 ms. Allocated memory is still 111.1 MB. Free memory was 79.1 MB in the beginning and 77.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:45,330 INFO L168 Benchmark]: RCFGBuilder took 1416.08 ms. Allocated memory was 111.1 MB in the beginning and 155.2 MB in the end (delta: 44.0 MB). Free memory was 77.0 MB in the beginning and 104.3 MB in the end (delta: -27.4 MB). Peak memory consumption was 48.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:45,331 INFO L168 Benchmark]: TraceAbstraction took 7251.88 ms. Allocated memory was 155.2 MB in the beginning and 285.2 MB in the end (delta: 130.0 MB). Free memory was 103.3 MB in the beginning and 204.3 MB in the end (delta: -101.0 MB). Peak memory consumption was 30.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:45,331 INFO L168 Benchmark]: Witness Printer took 4.53 ms. Allocated memory is still 285.2 MB. Free memory is still 204.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:30:45,334 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 111.1 MB. Free memory is still 65.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 391.87 ms. Allocated memory is still 111.1 MB. Free memory was 81.3 MB in the beginning and 81.8 MB in the end (delta: -577.4 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 87.61 ms. Allocated memory is still 111.1 MB. Free memory was 81.8 MB in the beginning and 79.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.04 ms. Allocated memory is still 111.1 MB. Free memory was 79.1 MB in the beginning and 77.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1416.08 ms. Allocated memory was 111.1 MB in the beginning and 155.2 MB in the end (delta: 44.0 MB). Free memory was 77.0 MB in the beginning and 104.3 MB in the end (delta: -27.4 MB). Peak memory consumption was 48.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7251.88 ms. Allocated memory was 155.2 MB in the beginning and 285.2 MB in the end (delta: 130.0 MB). Free memory was 103.3 MB in the beginning and 204.3 MB in the end (delta: -101.0 MB). Peak memory consumption was 30.0 MB. Max. memory is 16.1 GB. * Witness Printer took 4.53 ms. Allocated memory is still 285.2 MB. Free memory is still 204.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 609]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseXor at line 357. Possible FailurePath: [L618] int __retres1 ; [L11] int s__info_callback = __VERIFIER_nondet_int(); [L12] unsigned int s__in_handshake = __VERIFIER_nondet_uint(); [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] unsigned int s__version = __VERIFIER_nondet_uint(); [L17] int s__type ; [L18] int s__init_num ; [L19] int s__bbio = __VERIFIER_nondet_int(); [L20] int s__wbio = __VERIFIER_nondet_int(); [L21] int s__hit = __VERIFIER_nondet_int(); [L22] int s__rwstate ; [L23] int s__init_buf___0 = __VERIFIER_nondet_int(); [L24] int s__debug = __VERIFIER_nondet_int(); [L25] int s__shutdown ; [L26] int s__ctx__info_callback = __VERIFIER_nondet_int(); [L27] unsigned int s__ctx__stats__sess_connect_renegotiate = __VERIFIER_nondet_uint(); [L28] unsigned int s__ctx__stats__sess_connect = __VERIFIER_nondet_uint(); [L29] unsigned int s__ctx__stats__sess_hit = __VERIFIER_nondet_uint(); [L30] unsigned int s__ctx__stats__sess_connect_good = __VERIFIER_nondet_uint(); [L31] int s__s3__change_cipher_spec ; [L32] int s__s3__flags = __VERIFIER_nondet_int(); [L33] int s__s3__delay_buf_pop_ret ; [L34] int s__s3__tmp__cert_req = __VERIFIER_nondet_int(); [L35] int s__s3__tmp__new_compression = __VERIFIER_nondet_int(); [L36] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int(); [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int(); [L38] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int(); [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_compression__id = __VERIFIER_nondet_int(); [L41] int s__session__cipher ; [L42] int s__session__compress_meth ; [L43] int buf ; [L44] unsigned long tmp ; [L45] unsigned long l ; [L46] int num1 = __VERIFIER_nondet_int(); [L47] int cb ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int tmp___0 ; [L53] unsigned int tmp___1 = __VERIFIER_nondet_uint(); [L54] unsigned int tmp___2 = __VERIFIER_nondet_uint(); [L55] int tmp___3 = __VERIFIER_nondet_int(); [L56] int tmp___4 = __VERIFIER_nondet_int(); [L57] int tmp___5 = __VERIFIER_nondet_int(); [L58] int tmp___6 = __VERIFIER_nondet_int(); [L59] int tmp___7 = __VERIFIER_nondet_int(); [L60] int tmp___8 = __VERIFIER_nondet_int(); [L61] int tmp___9 = __VERIFIER_nondet_int(); [L62] int blastFlag ; [L63] int ag_X ; [L64] int ag_Y = __VERIFIER_nondet_int(); [L65] int __retres59 ; [L68] s__state = 12292 [L69] blastFlag = 0 [L70] tmp = __VERIFIER_nondet_int() [L71] cb = 0 [L72] ret = -1 [L73] skip = 0 [L74] tmp___0 = 0 [L75] COND TRUE s__info_callback != 0 [L76] cb = s__info_callback [L84] s__in_handshake = s__in_handshake + 1 [L85] COND FALSE !(tmp___1 - 12288) [L95] COND TRUE 1 [L97] state = s__state [L98] COND TRUE s__state == 12292 [L201] s__new_session = 1 [L202] s__state = 4096 [L203] s__ctx__stats__sess_connect_renegotiate = s__ctx__stats__sess_connect_renegotiate + 1 [L208] s__server = 0 [L209] COND TRUE cb != 0 [L214] COND FALSE !(s__version - 65280 != 768) [L220] s__type = 4096 [L221] COND FALSE !(s__init_buf___0 == 0) [L239] COND FALSE !(! tmp___4) [L245] COND FALSE !(! tmp___5) [L251] s__state = 4368 [L252] s__ctx__stats__sess_connect = s__ctx__stats__sess_connect + 1 [L253] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND TRUE blastFlag == 0 [L260] blastFlag = 1 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND TRUE s__bbio != s__wbio [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND TRUE blastFlag == 1 [L285] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND TRUE blastFlag == 2 [L308] blastFlag = 3 [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND TRUE blastFlag == 3 [L325] blastFlag = 4 [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND FALSE !(blastFlag == 5) [L352] COND FALSE !(ret <= 0) [L357] s__state = ag_X ^ ag_Y [L358] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND FALSE !(blastFlag == 0) [L262] COND TRUE blastFlag == 4 [L263] blastFlag = 5 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND TRUE s__bbio != s__wbio [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND FALSE !(blastFlag == 1) [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND FALSE !(blastFlag == 2) [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND FALSE !(blastFlag == 3) [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND TRUE blastFlag == 5 [L609] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 84 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.0s, OverallIterations: 10, TraceHistogramMax: 11, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1223 SDtfs, 754 SDslu, 1098 SDs, 0 SdLazy, 895 SolverSat, 211 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 299 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=744occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 197 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 1049 NumberOfCodeBlocks, 1049 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1009 ConstructedInterpolants, 0 QuantifiedInterpolants, 309017 SizeOfPredicates, 2 NumberOfNonLiveVariables, 432 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 13 InterpolantComputations, 9 PerfectInterpolantSequences, 1708/1967 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:30:47,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:30:47,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:30:47,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:30:47,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:30:47,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:30:47,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:30:47,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:30:47,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:30:47,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:30:47,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:30:47,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:30:47,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:30:47,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:30:47,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:30:47,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:30:47,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:30:47,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:30:47,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:30:47,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:30:47,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:30:47,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:30:47,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:30:47,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:30:47,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:30:47,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:30:47,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:30:47,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:30:47,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:30:47,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:30:47,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:30:47,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:30:47,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:30:47,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:30:47,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:30:47,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:30:47,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:30:47,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:30:47,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:30:47,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:30:47,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:30:47,949 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-11 02:30:47,988 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:30:47,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:30:47,989 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:30:47,989 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:30:47,989 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:30:47,990 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:30:47,990 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:30:47,990 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:30:47,990 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:30:47,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:30:47,993 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:30:47,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:30:47,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:30:47,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:30:47,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:30:47,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:30:47,994 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:30:47,994 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 02:30:47,994 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 02:30:47,994 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:30:47,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:30:47,995 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:30:47,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:30:47,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:30:47,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 02:30:47,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:30:47,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:30:47,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:30:47,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:30:47,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:30:47,996 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-11 02:30:47,997 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 02:30:47,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:30:47,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:30:47,997 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:30:47,998 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_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a92f0f2e799b323440c6f0b05c6a9c0af057fa0c [2021-10-11 02:30:48,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:30:48,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:30:48,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:30:48,429 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:30:48,434 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:30:48,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2021-10-11 02:30:48,503 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/data/16d264683/3fd696969ae5456baeabb1c421532919/FLAG6885f92ba [2021-10-11 02:30:49,160 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:30:49,161 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2021-10-11 02:30:49,180 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/data/16d264683/3fd696969ae5456baeabb1c421532919/FLAG6885f92ba [2021-10-11 02:30:49,485 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/data/16d264683/3fd696969ae5456baeabb1c421532919 [2021-10-11 02:30:49,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:30:49,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:30:49,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:49,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:30:49,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:30:49,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:49" (1/1) ... [2021-10-11 02:30:49,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cd3e577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:49, skipping insertion in model container [2021-10-11 02:30:49,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:49" (1/1) ... [2021-10-11 02:30:49,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:30:49,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:30:49,861 WARN L226 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_99015c66-cd1d-478b-bea8-78a0b5894f4c/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2021-10-11 02:30:49,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:30:49,901 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:30:49,981 WARN L226 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_99015c66-cd1d-478b-bea8-78a0b5894f4c/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2021-10-11 02:30:49,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:30:49,998 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:30:49,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:49 WrapperNode [2021-10-11 02:30:49,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:50,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:30:50,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:30:50,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:30:50,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:49" (1/1) ... [2021-10-11 02:30:50,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:49" (1/1) ... [2021-10-11 02:30:50,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:30:50,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:30:50,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:30:50,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:30:50,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:49" (1/1) ... [2021-10-11 02:30:50,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:49" (1/1) ... [2021-10-11 02:30:50,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:49" (1/1) ... [2021-10-11 02:30:50,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:49" (1/1) ... [2021-10-11 02:30:50,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:49" (1/1) ... [2021-10-11 02:30:50,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:49" (1/1) ... [2021-10-11 02:30:50,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:49" (1/1) ... [2021-10-11 02:30:50,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:30:50,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:30:50,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:30:50,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:30:50,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:49" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:30:50,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:30:50,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:30:50,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:30:50,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:30:50,471 WARN L800 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-11 02:30:50,995 INFO L752 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-11 02:30:50,995 INFO L752 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-11 02:30:51,004 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:30:51,005 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:30:51,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:51 BoogieIcfgContainer [2021-10-11 02:30:51,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:30:51,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:30:51,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:30:51,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:30:51,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:30:49" (1/3) ... [2021-10-11 02:30:51,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c86f051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:51, skipping insertion in model container [2021-10-11 02:30:51,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:49" (2/3) ... [2021-10-11 02:30:51,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c86f051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:51, skipping insertion in model container [2021-10-11 02:30:51,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:51" (3/3) ... [2021-10-11 02:30:51,014 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_2.BV.c.cil-2a.c [2021-10-11 02:30:51,028 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:30:51,031 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:30:51,043 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:30:51,066 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:30:51,066 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:30:51,066 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:30:51,067 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:30:51,067 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:30:51,067 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:30:51,067 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:30:51,067 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:30:51,083 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states. [2021-10-11 02:30:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-11 02:30:51,090 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:51,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:51,091 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:51,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:51,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1457697026, now seen corresponding path program 1 times [2021-10-11 02:30:51,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:30:51,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156633451] [2021-10-11 02:30:51,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 02:30:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:51,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:30:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:51,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:30:51,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156633451] [2021-10-11 02:30:51,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:51,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:51,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809077661] [2021-10-11 02:30:51,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:51,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:30:51,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:51,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:51,431 INFO L87 Difference]: Start difference. First operand 125 states. Second operand 3 states. [2021-10-11 02:30:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:51,682 INFO L93 Difference]: Finished difference Result 246 states and 421 transitions. [2021-10-11 02:30:51,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:51,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2021-10-11 02:30:51,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:51,700 INFO L225 Difference]: With dead ends: 246 [2021-10-11 02:30:51,701 INFO L226 Difference]: Without dead ends: 112 [2021-10-11 02:30:51,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:51,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-11 02:30:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-10-11 02:30:51,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-10-11 02:30:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 169 transitions. [2021-10-11 02:30:51,761 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 169 transitions. Word has length 24 [2021-10-11 02:30:51,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:51,761 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 169 transitions. [2021-10-11 02:30:51,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:51,762 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 169 transitions. [2021-10-11 02:30:51,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-11 02:30:51,765 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:51,765 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:51,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:30:51,984 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:51,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:51,985 INFO L82 PathProgramCache]: Analyzing trace with hash -611475394, now seen corresponding path program 1 times [2021-10-11 02:30:51,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:30:51,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316941795] [2021-10-11 02:30:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 02:30:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:52,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:30:52,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:52,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:30:52,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316941795] [2021-10-11 02:30:52,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:52,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:52,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952021924] [2021-10-11 02:30:52,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:52,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:30:52,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:52,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:52,158 INFO L87 Difference]: Start difference. First operand 112 states and 169 transitions. Second operand 3 states. [2021-10-11 02:30:52,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:52,343 INFO L93 Difference]: Finished difference Result 233 states and 356 transitions. [2021-10-11 02:30:52,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:52,345 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2021-10-11 02:30:52,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:52,352 INFO L225 Difference]: With dead ends: 233 [2021-10-11 02:30:52,352 INFO L226 Difference]: Without dead ends: 131 [2021-10-11 02:30:52,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:52,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-11 02:30:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-10-11 02:30:52,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-10-11 02:30:52,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 189 transitions. [2021-10-11 02:30:52,380 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 189 transitions. Word has length 36 [2021-10-11 02:30:52,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:52,381 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 189 transitions. [2021-10-11 02:30:52,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 189 transitions. [2021-10-11 02:30:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-11 02:30:52,387 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:52,388 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:52,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:30:52,599 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:52,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:52,599 INFO L82 PathProgramCache]: Analyzing trace with hash 213639527, now seen corresponding path program 1 times [2021-10-11 02:30:52,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:30:52,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944187423] [2021-10-11 02:30:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2021-10-11 02:30:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:52,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:30:52,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:30:52,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:30:52,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944187423] [2021-10-11 02:30:52,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:52,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:52,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159160389] [2021-10-11 02:30:52,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:52,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:30:52,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:52,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:52,830 INFO L87 Difference]: Start difference. First operand 127 states and 189 transitions. Second operand 3 states. [2021-10-11 02:30:53,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:53,025 INFO L93 Difference]: Finished difference Result 265 states and 400 transitions. [2021-10-11 02:30:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:53,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2021-10-11 02:30:53,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:53,028 INFO L225 Difference]: With dead ends: 265 [2021-10-11 02:30:53,028 INFO L226 Difference]: Without dead ends: 148 [2021-10-11 02:30:53,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:53,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-11 02:30:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2021-10-11 02:30:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-10-11 02:30:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 211 transitions. [2021-10-11 02:30:53,039 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 211 transitions. Word has length 50 [2021-10-11 02:30:53,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:53,040 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 211 transitions. [2021-10-11 02:30:53,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:53,040 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 211 transitions. [2021-10-11 02:30:53,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-11 02:30:53,042 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:53,043 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:53,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 02:30:53,257 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:53,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:53,257 INFO L82 PathProgramCache]: Analyzing trace with hash 370823208, now seen corresponding path program 1 times [2021-10-11 02:30:53,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:30:53,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944337820] [2021-10-11 02:30:53,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2021-10-11 02:30:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:53,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:30:53,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-11 02:30:53,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:30:53,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944337820] [2021-10-11 02:30:53,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:53,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:53,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812772418] [2021-10-11 02:30:53,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:53,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:30:53,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:53,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:53,499 INFO L87 Difference]: Start difference. First operand 144 states and 211 transitions. Second operand 3 states. [2021-10-11 02:30:53,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:53,750 INFO L93 Difference]: Finished difference Result 321 states and 487 transitions. [2021-10-11 02:30:53,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:53,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2021-10-11 02:30:53,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:53,753 INFO L225 Difference]: With dead ends: 321 [2021-10-11 02:30:53,753 INFO L226 Difference]: Without dead ends: 187 [2021-10-11 02:30:53,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:53,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-11 02:30:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2021-10-11 02:30:53,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-10-11 02:30:53,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 256 transitions. [2021-10-11 02:30:53,783 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 256 transitions. Word has length 67 [2021-10-11 02:30:53,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:53,785 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 256 transitions. [2021-10-11 02:30:53,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:53,786 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 256 transitions. [2021-10-11 02:30:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-11 02:30:53,789 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:53,789 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:54,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2021-10-11 02:30:54,001 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:54,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:54,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1434615126, now seen corresponding path program 1 times [2021-10-11 02:30:54,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:30:54,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862622868] [2021-10-11 02:30:54,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2021-10-11 02:30:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:54,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:30:54,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-11 02:30:54,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:30:54,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862622868] [2021-10-11 02:30:54,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:54,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:54,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416926571] [2021-10-11 02:30:54,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:54,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:30:54,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:54,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:54,178 INFO L87 Difference]: Start difference. First operand 184 states and 256 transitions. Second operand 3 states. [2021-10-11 02:30:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:54,335 INFO L93 Difference]: Finished difference Result 381 states and 538 transitions. [2021-10-11 02:30:54,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:54,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2021-10-11 02:30:54,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:54,338 INFO L225 Difference]: With dead ends: 381 [2021-10-11 02:30:54,338 INFO L226 Difference]: Without dead ends: 207 [2021-10-11 02:30:54,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:54,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-10-11 02:30:54,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2021-10-11 02:30:54,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2021-10-11 02:30:54,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 280 transitions. [2021-10-11 02:30:54,360 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 280 transitions. Word has length 67 [2021-10-11 02:30:54,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:54,361 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 280 transitions. [2021-10-11 02:30:54,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:54,362 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 280 transitions. [2021-10-11 02:30:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-11 02:30:54,367 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:54,368 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:54,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2021-10-11 02:30:54,586 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:54,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1023824768, now seen corresponding path program 1 times [2021-10-11 02:30:54,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:30:54,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441069255] [2021-10-11 02:30:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2021-10-11 02:30:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:54,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:30:54,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:54,831 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-11 02:30:54,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:30:54,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441069255] [2021-10-11 02:30:54,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:54,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:54,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506746193] [2021-10-11 02:30:54,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:54,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:30:54,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:54,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:54,837 INFO L87 Difference]: Start difference. First operand 203 states and 280 transitions. Second operand 3 states. [2021-10-11 02:30:55,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:55,032 INFO L93 Difference]: Finished difference Result 420 states and 588 transitions. [2021-10-11 02:30:55,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:55,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2021-10-11 02:30:55,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:55,035 INFO L225 Difference]: With dead ends: 420 [2021-10-11 02:30:55,035 INFO L226 Difference]: Without dead ends: 227 [2021-10-11 02:30:55,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:55,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-10-11 02:30:55,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2021-10-11 02:30:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2021-10-11 02:30:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 306 transitions. [2021-10-11 02:30:55,045 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 306 transitions. Word has length 83 [2021-10-11 02:30:55,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:55,045 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 306 transitions. [2021-10-11 02:30:55,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:55,046 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 306 transitions. [2021-10-11 02:30:55,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-11 02:30:55,047 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:55,048 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:55,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2021-10-11 02:30:55,262 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:55,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:55,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1619803512, now seen corresponding path program 1 times [2021-10-11 02:30:55,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:30:55,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481617008] [2021-10-11 02:30:55,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2021-10-11 02:30:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:55,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:30:55,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-11 02:30:55,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:30:55,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481617008] [2021-10-11 02:30:55,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:55,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:55,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240878554] [2021-10-11 02:30:55,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:55,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:30:55,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:55,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:55,518 INFO L87 Difference]: Start difference. First operand 224 states and 306 transitions. Second operand 3 states. [2021-10-11 02:30:55,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:55,564 INFO L93 Difference]: Finished difference Result 649 states and 888 transitions. [2021-10-11 02:30:55,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:55,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2021-10-11 02:30:55,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:55,568 INFO L225 Difference]: With dead ends: 649 [2021-10-11 02:30:55,568 INFO L226 Difference]: Without dead ends: 435 [2021-10-11 02:30:55,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:55,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-10-11 02:30:55,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2021-10-11 02:30:55,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2021-10-11 02:30:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 590 transitions. [2021-10-11 02:30:55,584 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 590 transitions. Word has length 103 [2021-10-11 02:30:55,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:55,584 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 590 transitions. [2021-10-11 02:30:55,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 590 transitions. [2021-10-11 02:30:55,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-11 02:30:55,586 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:55,586 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:55,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2021-10-11 02:30:55,803 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:55,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:55,803 INFO L82 PathProgramCache]: Analyzing trace with hash -713589126, now seen corresponding path program 1 times [2021-10-11 02:30:55,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:30:55,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082131749] [2021-10-11 02:30:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2021-10-11 02:30:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:55,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:30:55,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-11 02:30:56,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:30:56,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082131749] [2021-10-11 02:30:56,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:56,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:56,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507612082] [2021-10-11 02:30:56,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:56,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:30:56,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:56,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:56,011 INFO L87 Difference]: Start difference. First operand 435 states and 590 transitions. Second operand 3 states. [2021-10-11 02:30:56,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:56,046 INFO L93 Difference]: Finished difference Result 881 states and 1194 transitions. [2021-10-11 02:30:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:56,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2021-10-11 02:30:56,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:56,050 INFO L225 Difference]: With dead ends: 881 [2021-10-11 02:30:56,050 INFO L226 Difference]: Without dead ends: 456 [2021-10-11 02:30:56,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:56,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-10-11 02:30:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2021-10-11 02:30:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2021-10-11 02:30:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 617 transitions. [2021-10-11 02:30:56,067 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 617 transitions. Word has length 103 [2021-10-11 02:30:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:56,067 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 617 transitions. [2021-10-11 02:30:56,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 617 transitions. [2021-10-11 02:30:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-11 02:30:56,069 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:56,069 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:56,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2021-10-11 02:30:56,288 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:56,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:56,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1034569449, now seen corresponding path program 1 times [2021-10-11 02:30:56,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:30:56,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282448373] [2021-10-11 02:30:56,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2021-10-11 02:30:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:56,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:30:56,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-11 02:30:56,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:30:56,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282448373] [2021-10-11 02:30:56,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:56,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:56,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522017632] [2021-10-11 02:30:56,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:56,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:30:56,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:56,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:56,508 INFO L87 Difference]: Start difference. First operand 456 states and 617 transitions. Second operand 3 states. [2021-10-11 02:30:56,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:56,558 INFO L93 Difference]: Finished difference Result 928 states and 1254 transitions. [2021-10-11 02:30:56,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:56,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 104 [2021-10-11 02:30:56,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:56,561 INFO L225 Difference]: With dead ends: 928 [2021-10-11 02:30:56,562 INFO L226 Difference]: Without dead ends: 482 [2021-10-11 02:30:56,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:56,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-10-11 02:30:56,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2021-10-11 02:30:56,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2021-10-11 02:30:56,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 650 transitions. [2021-10-11 02:30:56,579 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 650 transitions. Word has length 104 [2021-10-11 02:30:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:56,579 INFO L481 AbstractCegarLoop]: Abstraction has 482 states and 650 transitions. [2021-10-11 02:30:56,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:56,580 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 650 transitions. [2021-10-11 02:30:56,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-11 02:30:56,581 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:56,581 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:56,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2021-10-11 02:30:56,799 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:56,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:56,799 INFO L82 PathProgramCache]: Analyzing trace with hash -53319870, now seen corresponding path program 1 times [2021-10-11 02:30:56,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:30:56,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275274950] [2021-10-11 02:30:56,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2021-10-11 02:30:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:56,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:30:56,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-10-11 02:30:57,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:30:57,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275274950] [2021-10-11 02:30:57,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:57,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:57,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180285359] [2021-10-11 02:30:57,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:57,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:30:57,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:57,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:57,003 INFO L87 Difference]: Start difference. First operand 482 states and 650 transitions. Second operand 3 states. [2021-10-11 02:30:57,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:57,064 INFO L93 Difference]: Finished difference Result 1121 states and 1519 transitions. [2021-10-11 02:30:57,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:57,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2021-10-11 02:30:57,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:57,069 INFO L225 Difference]: With dead ends: 1121 [2021-10-11 02:30:57,069 INFO L226 Difference]: Without dead ends: 675 [2021-10-11 02:30:57,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:57,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-10-11 02:30:57,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 675. [2021-10-11 02:30:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2021-10-11 02:30:57,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 910 transitions. [2021-10-11 02:30:57,100 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 910 transitions. Word has length 105 [2021-10-11 02:30:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:57,100 INFO L481 AbstractCegarLoop]: Abstraction has 675 states and 910 transitions. [2021-10-11 02:30:57,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:57,100 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 910 transitions. [2021-10-11 02:30:57,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-11 02:30:57,103 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:57,103 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:57,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2021-10-11 02:30:57,316 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:57,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:57,317 INFO L82 PathProgramCache]: Analyzing trace with hash -187333376, now seen corresponding path program 1 times [2021-10-11 02:30:57,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:30:57,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452514818] [2021-10-11 02:30:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2021-10-11 02:30:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:57,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:30:57,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-11 02:30:57,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:30:57,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452514818] [2021-10-11 02:30:57,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:57,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:57,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929865883] [2021-10-11 02:30:57,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:57,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:30:57,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:57,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:57,546 INFO L87 Difference]: Start difference. First operand 675 states and 910 transitions. Second operand 3 states. [2021-10-11 02:30:57,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:57,584 INFO L93 Difference]: Finished difference Result 1339 states and 1804 transitions. [2021-10-11 02:30:57,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:57,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2021-10-11 02:30:57,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:57,591 INFO L225 Difference]: With dead ends: 1339 [2021-10-11 02:30:57,591 INFO L226 Difference]: Without dead ends: 700 [2021-10-11 02:30:57,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:57,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-10-11 02:30:57,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 700. [2021-10-11 02:30:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2021-10-11 02:30:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 940 transitions. [2021-10-11 02:30:57,616 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 940 transitions. Word has length 105 [2021-10-11 02:30:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:57,616 INFO L481 AbstractCegarLoop]: Abstraction has 700 states and 940 transitions. [2021-10-11 02:30:57,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:57,617 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 940 transitions. [2021-10-11 02:30:57,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-10-11 02:30:57,620 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:57,620 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:57,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2021-10-11 02:30:57,831 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:57,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:57,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1519363111, now seen corresponding path program 1 times [2021-10-11 02:30:57,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:30:57,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729935414] [2021-10-11 02:30:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2021-10-11 02:30:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:57,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:30:57,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-10-11 02:30:58,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:30:58,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729935414] [2021-10-11 02:30:58,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:58,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:58,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510736379] [2021-10-11 02:30:58,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:58,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:30:58,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:58,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:58,120 INFO L87 Difference]: Start difference. First operand 700 states and 940 transitions. Second operand 3 states. [2021-10-11 02:30:58,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:58,320 INFO L93 Difference]: Finished difference Result 1444 states and 1970 transitions. [2021-10-11 02:30:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:58,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2021-10-11 02:30:58,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:58,325 INFO L225 Difference]: With dead ends: 1444 [2021-10-11 02:30:58,326 INFO L226 Difference]: Without dead ends: 780 [2021-10-11 02:30:58,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:58,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-10-11 02:30:58,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 769. [2021-10-11 02:30:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 769 states. [2021-10-11 02:30:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1024 transitions. [2021-10-11 02:30:58,351 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1024 transitions. Word has length 173 [2021-10-11 02:30:58,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:58,351 INFO L481 AbstractCegarLoop]: Abstraction has 769 states and 1024 transitions. [2021-10-11 02:30:58,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1024 transitions. [2021-10-11 02:30:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-10-11 02:30:58,355 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:58,355 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:58,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2021-10-11 02:30:58,567 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:58,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:58,568 INFO L82 PathProgramCache]: Analyzing trace with hash -759567935, now seen corresponding path program 1 times [2021-10-11 02:30:58,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:30:58,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801772305] [2021-10-11 02:30:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2021-10-11 02:30:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:58,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:30:58,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-11 02:30:58,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:30:58,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801772305] [2021-10-11 02:30:58,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:58,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:58,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321039090] [2021-10-11 02:30:58,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:58,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:30:58,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:58,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:58,904 INFO L87 Difference]: Start difference. First operand 769 states and 1024 transitions. Second operand 3 states. [2021-10-11 02:30:58,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:58,940 INFO L93 Difference]: Finished difference Result 1734 states and 2312 transitions. [2021-10-11 02:30:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:58,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2021-10-11 02:30:58,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:58,947 INFO L225 Difference]: With dead ends: 1734 [2021-10-11 02:30:58,947 INFO L226 Difference]: Without dead ends: 1001 [2021-10-11 02:30:58,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:58,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-10-11 02:30:58,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 1001. [2021-10-11 02:30:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2021-10-11 02:30:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1332 transitions. [2021-10-11 02:30:58,983 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1332 transitions. Word has length 194 [2021-10-11 02:30:58,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:58,983 INFO L481 AbstractCegarLoop]: Abstraction has 1001 states and 1332 transitions. [2021-10-11 02:30:58,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1332 transitions. [2021-10-11 02:30:58,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-10-11 02:30:58,987 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:58,987 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:59,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2021-10-11 02:30:59,203 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:59,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:59,203 INFO L82 PathProgramCache]: Analyzing trace with hash -915330113, now seen corresponding path program 1 times [2021-10-11 02:30:59,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:30:59,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364832325] [2021-10-11 02:30:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2021-10-11 02:30:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:59,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:30:59,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-10-11 02:30:59,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:30:59,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364832325] [2021-10-11 02:30:59,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:59,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:59,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75380676] [2021-10-11 02:30:59,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:59,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:30:59,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:59,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:59,552 INFO L87 Difference]: Start difference. First operand 1001 states and 1332 transitions. Second operand 3 states. [2021-10-11 02:30:59,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:59,623 INFO L93 Difference]: Finished difference Result 2498 states and 3353 transitions. [2021-10-11 02:30:59,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:59,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2021-10-11 02:30:59,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:59,632 INFO L225 Difference]: With dead ends: 2498 [2021-10-11 02:30:59,632 INFO L226 Difference]: Without dead ends: 1554 [2021-10-11 02:30:59,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:59,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-10-11 02:30:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1552. [2021-10-11 02:30:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1552 states. [2021-10-11 02:30:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2082 transitions. [2021-10-11 02:30:59,693 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2082 transitions. Word has length 196 [2021-10-11 02:30:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:59,693 INFO L481 AbstractCegarLoop]: Abstraction has 1552 states and 2082 transitions. [2021-10-11 02:30:59,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:59,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2082 transitions. [2021-10-11 02:30:59,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-10-11 02:30:59,698 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:59,698 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:59,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3 [2021-10-11 02:30:59,917 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:59,918 INFO L82 PathProgramCache]: Analyzing trace with hash 890108221, now seen corresponding path program 1 times [2021-10-11 02:30:59,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:30:59,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256533766] [2021-10-11 02:30:59,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2021-10-11 02:31:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:00,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:31:00,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-10-11 02:31:00,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:31:00,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256533766] [2021-10-11 02:31:00,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:00,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:31:00,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644600847] [2021-10-11 02:31:00,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:00,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:31:00,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:00,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:00,265 INFO L87 Difference]: Start difference. First operand 1552 states and 2082 transitions. Second operand 3 states. [2021-10-11 02:31:00,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:00,310 INFO L93 Difference]: Finished difference Result 2420 states and 3232 transitions. [2021-10-11 02:31:00,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:00,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2021-10-11 02:31:00,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:00,319 INFO L225 Difference]: With dead ends: 2420 [2021-10-11 02:31:00,319 INFO L226 Difference]: Without dead ends: 1556 [2021-10-11 02:31:00,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:00,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-10-11 02:31:00,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1554. [2021-10-11 02:31:00,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2021-10-11 02:31:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2075 transitions. [2021-10-11 02:31:00,371 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2075 transitions. Word has length 196 [2021-10-11 02:31:00,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:00,372 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2075 transitions. [2021-10-11 02:31:00,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:00,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2075 transitions. [2021-10-11 02:31:00,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-10-11 02:31:00,393 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:00,394 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:00,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3 [2021-10-11 02:31:00,594 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:00,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:00,595 INFO L82 PathProgramCache]: Analyzing trace with hash 342847369, now seen corresponding path program 1 times [2021-10-11 02:31:00,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:31:00,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879045244] [2021-10-11 02:31:00,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2021-10-11 02:31:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:31:00,727 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:31:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:31:00,849 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:31:01,245 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-11 02:31:01,245 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:31:01,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 mathsat -unsat_core_generation=3 [2021-10-11 02:31:01,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:31:01 BoogieIcfgContainer [2021-10-11 02:31:01,639 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:31:01,639 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:31:01,640 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:31:01,640 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:31:01,640 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:51" (3/4) ... [2021-10-11 02:31:01,643 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:31:01,815 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99015c66-cd1d-478b-bea8-78a0b5894f4c/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:31:01,815 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:31:01,817 INFO L168 Benchmark]: Toolchain (without parser) took 12325.56 ms. Allocated memory was 60.8 MB in the beginning and 161.5 MB in the end (delta: 100.7 MB). Free memory was 40.7 MB in the beginning and 132.6 MB in the end (delta: -92.0 MB). Peak memory consumption was 98.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:01,817 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 60.8 MB. Free memory is still 42.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:01,818 INFO L168 Benchmark]: CACSL2BoogieTranslator took 506.11 ms. Allocated memory is still 60.8 MB. Free memory was 40.5 MB in the beginning and 25.6 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:01,818 INFO L168 Benchmark]: Boogie Procedure Inliner took 101.19 ms. Allocated memory is still 60.8 MB. Free memory was 25.6 MB in the beginning and 42.4 MB in the end (delta: -16.9 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:01,819 INFO L168 Benchmark]: Boogie Preprocessor took 66.05 ms. Allocated memory is still 60.8 MB. Free memory was 42.4 MB in the beginning and 40.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:01,819 INFO L168 Benchmark]: RCFGBuilder took 837.50 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 40.1 MB in the beginning and 49.0 MB in the end (delta: -8.9 MB). Peak memory consumption was 24.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:01,820 INFO L168 Benchmark]: TraceAbstraction took 10630.65 ms. Allocated memory was 75.5 MB in the beginning and 161.5 MB in the end (delta: 86.0 MB). Free memory was 48.6 MB in the beginning and 65.2 MB in the end (delta: -16.6 MB). Peak memory consumption was 69.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:01,820 INFO L168 Benchmark]: Witness Printer took 176.11 ms. Allocated memory is still 161.5 MB. Free memory was 65.2 MB in the beginning and 132.6 MB in the end (delta: -67.5 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:01,822 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 60.8 MB. Free memory is still 42.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 506.11 ms. Allocated memory is still 60.8 MB. Free memory was 40.5 MB in the beginning and 25.6 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 101.19 ms. Allocated memory is still 60.8 MB. Free memory was 25.6 MB in the beginning and 42.4 MB in the end (delta: -16.9 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 66.05 ms. Allocated memory is still 60.8 MB. Free memory was 42.4 MB in the beginning and 40.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 837.50 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 40.1 MB in the beginning and 49.0 MB in the end (delta: -8.9 MB). Peak memory consumption was 24.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10630.65 ms. Allocated memory was 75.5 MB in the beginning and 161.5 MB in the end (delta: 86.0 MB). Free memory was 48.6 MB in the beginning and 65.2 MB in the end (delta: -16.6 MB). Peak memory consumption was 69.9 MB. Max. memory is 16.1 GB. * Witness Printer took 176.11 ms. Allocated memory is still 161.5 MB. Free memory was 65.2 MB in the beginning and 132.6 MB in the end (delta: -67.5 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 609]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L618] int __retres1 ; [L11] int s__info_callback = __VERIFIER_nondet_int(); [L12] unsigned int s__in_handshake = __VERIFIER_nondet_uint(); [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] unsigned int s__version = __VERIFIER_nondet_uint(); [L17] int s__type ; [L18] int s__init_num ; [L19] int s__bbio = __VERIFIER_nondet_int(); [L20] int s__wbio = __VERIFIER_nondet_int(); [L21] int s__hit = __VERIFIER_nondet_int(); [L22] int s__rwstate ; [L23] int s__init_buf___0 = __VERIFIER_nondet_int(); [L24] int s__debug = __VERIFIER_nondet_int(); [L25] int s__shutdown ; [L26] int s__ctx__info_callback = __VERIFIER_nondet_int(); [L27] unsigned int s__ctx__stats__sess_connect_renegotiate = __VERIFIER_nondet_uint(); [L28] unsigned int s__ctx__stats__sess_connect = __VERIFIER_nondet_uint(); [L29] unsigned int s__ctx__stats__sess_hit = __VERIFIER_nondet_uint(); [L30] unsigned int s__ctx__stats__sess_connect_good = __VERIFIER_nondet_uint(); [L31] int s__s3__change_cipher_spec ; [L32] int s__s3__flags = __VERIFIER_nondet_int(); [L33] int s__s3__delay_buf_pop_ret ; [L34] int s__s3__tmp__cert_req = __VERIFIER_nondet_int(); [L35] int s__s3__tmp__new_compression = __VERIFIER_nondet_int(); [L36] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int(); [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int(); [L38] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int(); [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_compression__id = __VERIFIER_nondet_int(); [L41] int s__session__cipher ; [L42] int s__session__compress_meth ; [L43] int buf ; [L44] unsigned long tmp ; [L45] unsigned long l ; [L46] int num1 = __VERIFIER_nondet_int(); [L47] int cb ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int tmp___0 ; [L53] unsigned int tmp___1 = __VERIFIER_nondet_uint(); [L54] unsigned int tmp___2 = __VERIFIER_nondet_uint(); [L55] int tmp___3 = __VERIFIER_nondet_int(); [L56] int tmp___4 = __VERIFIER_nondet_int(); [L57] int tmp___5 = __VERIFIER_nondet_int(); [L58] int tmp___6 = __VERIFIER_nondet_int(); [L59] int tmp___7 = __VERIFIER_nondet_int(); [L60] int tmp___8 = __VERIFIER_nondet_int(); [L61] int tmp___9 = __VERIFIER_nondet_int(); [L62] int blastFlag ; [L63] int ag_X ; [L64] int ag_Y = __VERIFIER_nondet_int(); [L65] int __retres59 ; [L68] s__state = 12292 [L69] blastFlag = 0 [L70] tmp = __VERIFIER_nondet_int() [L71] cb = 0 [L72] ret = -1 [L73] skip = 0 [L74] tmp___0 = 0 [L75] COND TRUE s__info_callback != 0 [L76] cb = s__info_callback [L84] s__in_handshake = s__in_handshake + 1 [L85] COND FALSE !(tmp___1 - 12288) [L95] COND TRUE 1 [L97] state = s__state [L98] COND TRUE s__state == 12292 [L201] s__new_session = 1 [L202] s__state = 4096 [L203] s__ctx__stats__sess_connect_renegotiate = s__ctx__stats__sess_connect_renegotiate + 1 [L208] s__server = 0 [L209] COND TRUE cb != 0 [L214] COND FALSE !(s__version - 65280 != 768) [L220] s__type = 4096 [L221] COND FALSE !(s__init_buf___0 == 0) [L239] COND FALSE !(! tmp___4) [L245] COND FALSE !(! tmp___5) [L251] s__state = 4368 [L252] s__ctx__stats__sess_connect = s__ctx__stats__sess_connect + 1 [L253] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND TRUE blastFlag == 0 [L260] blastFlag = 1 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND TRUE s__bbio != s__wbio [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND TRUE blastFlag == 1 [L285] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND TRUE blastFlag == 2 [L308] blastFlag = 3 [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND TRUE blastFlag == 3 [L325] blastFlag = 4 [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND FALSE !(blastFlag == 5) [L352] COND FALSE !(ret <= 0) [L357] s__state = ag_X ^ ag_Y [L358] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND FALSE !(blastFlag == 0) [L262] COND TRUE blastFlag == 4 [L263] blastFlag = 5 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND TRUE s__bbio != s__wbio [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND FALSE !(blastFlag == 1) [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND FALSE !(blastFlag == 2) [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND FALSE !(blastFlag == 3) [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND TRUE blastFlag == 5 [L609] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 125 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.3s, OverallIterations: 16, TraceHistogramMax: 11, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3099 SDtfs, 715 SDslu, 1809 SDs, 0 SdLazy, 792 SolverSat, 103 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1591 GetRequests, 1576 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1554occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 33 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 1802 NumberOfCodeBlocks, 1802 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1591 ConstructedInterpolants, 0 QuantifiedInterpolants, 374179 SizeOfPredicates, 0 NumberOfNonLiveVariables, 2733 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 15 InterpolantComputations, 15 PerfectInterpolantSequences, 2879/2879 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...