./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan --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 2d0dd826da977145676f85980fecf0ec40390b47 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan --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 2d0dd826da977145676f85980fecf0ec40390b47 ............................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:38:45,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:38:45,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:38:45,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:38:45,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:38:45,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:38:45,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:38:45,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:38:45,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:38:45,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:38:45,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:38:45,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:38:45,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:38:45,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:38:45,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:38:45,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:38:45,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:38:45,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:38:45,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:38:45,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:38:45,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:38:45,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:38:45,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:38:45,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:38:45,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:38:45,730 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:38:45,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:38:45,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:38:45,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:38:45,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:38:45,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:38:45,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:38:45,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:38:45,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:38:45,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:38:45,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:38:45,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:38:45,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:38:45,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:38:45,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:38:45,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:38:45,760 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-03 12:38:45,802 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:38:45,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:38:45,803 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:38:45,803 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:38:45,803 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:38:45,804 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:38:45,804 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:38:45,804 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:38:45,804 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:38:45,804 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:38:45,805 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:38:45,805 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:38:45,805 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:38:45,805 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:38:45,806 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:38:45,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:38:45,807 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:38:45,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:38:45,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:38:45,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:38:45,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:38:45,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:38:45,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:38:45,808 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:38:45,808 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:38:45,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:38:45,809 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:38:45,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:38:45,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:38:45,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:38:45,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:38:45,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:38:45,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:38:45,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:38:45,811 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:38:45,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:38:45,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:38:45,815 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:38:45,815 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:38:45,815 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-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d0dd826da977145676f85980fecf0ec40390b47 [2020-12-03 12:38:46,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:38:46,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:38:46,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:38:46,139 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:38:46,140 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:38:46,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i [2020-12-03 12:38:46,208 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/data/437cb5c2b/2080beb29bcc4af7ad0f33b15de4d956/FLAGabd8cfecd [2020-12-03 12:38:46,708 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:38:46,708 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i [2020-12-03 12:38:46,715 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/data/437cb5c2b/2080beb29bcc4af7ad0f33b15de4d956/FLAGabd8cfecd [2020-12-03 12:38:47,106 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/data/437cb5c2b/2080beb29bcc4af7ad0f33b15de4d956 [2020-12-03 12:38:47,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:38:47,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:38:47,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:38:47,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:38:47,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:38:47,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:38:47" (1/1) ... [2020-12-03 12:38:47,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e3123a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:47, skipping insertion in model container [2020-12-03 12:38:47,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:38:47" (1/1) ... [2020-12-03 12:38:47,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:38:47,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:38:47,317 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i[951,964] [2020-12-03 12:38:47,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:38:47,371 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:38:47,389 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i[951,964] [2020-12-03 12:38:47,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:38:47,420 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:38:47,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:47 WrapperNode [2020-12-03 12:38:47,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:38:47,421 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:38:47,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:38:47,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:38:47,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:47" (1/1) ... [2020-12-03 12:38:47,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:47" (1/1) ... [2020-12-03 12:38:47,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:38:47,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:38:47,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:38:47,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:38:47,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:47" (1/1) ... [2020-12-03 12:38:47,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:47" (1/1) ... [2020-12-03 12:38:47,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:47" (1/1) ... [2020-12-03 12:38:47,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:47" (1/1) ... [2020-12-03 12:38:47,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:47" (1/1) ... [2020-12-03 12:38:47,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:47" (1/1) ... [2020-12-03 12:38:47,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:47" (1/1) ... [2020-12-03 12:38:47,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:38:47,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:38:47,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:38:47,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:38:47,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/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 [2020-12-03 12:38:47,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 12:38:47,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:38:47,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:38:47,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:38:47,940 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:38:47,940 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-03 12:38:47,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:38:47 BoogieIcfgContainer [2020-12-03 12:38:47,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:38:47,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:38:47,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:38:47,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:38:47,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:38:47" (1/3) ... [2020-12-03 12:38:47,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187b5511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:38:47, skipping insertion in model container [2020-12-03 12:38:47,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:47" (2/3) ... [2020-12-03 12:38:47,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187b5511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:38:47, skipping insertion in model container [2020-12-03 12:38:47,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:38:47" (3/3) ... [2020-12-03 12:38:47,953 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound1.i [2020-12-03 12:38:47,969 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:38:47,972 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-03 12:38:47,984 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-03 12:38:48,039 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:38:48,040 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:38:48,040 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:38:48,040 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:38:48,041 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:38:48,041 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:38:48,041 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:38:48,041 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:38:48,054 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-03 12:38:48,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:38:48,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:48,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:38:48,078 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:38:48,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:48,084 INFO L82 PathProgramCache]: Analyzing trace with hash 104004450, now seen corresponding path program 1 times [2020-12-03 12:38:48,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:48,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035764916] [2020-12-03 12:38:48,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:48,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035764916] [2020-12-03 12:38:48,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:48,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:38:48,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084817751] [2020-12-03 12:38:48,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 12:38:48,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:48,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 12:38:48,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 12:38:48,371 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2020-12-03 12:38:48,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:48,390 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2020-12-03 12:38:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 12:38:48,392 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-03 12:38:48,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:48,418 INFO L225 Difference]: With dead ends: 25 [2020-12-03 12:38:48,421 INFO L226 Difference]: Without dead ends: 12 [2020-12-03 12:38:48,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 12:38:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-03 12:38:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-03 12:38:48,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-03 12:38:48,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-03 12:38:48,463 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 5 [2020-12-03 12:38:48,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:48,464 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-03 12:38:48,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 12:38:48,464 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-03 12:38:48,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 12:38:48,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:48,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 12:38:48,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:38:48,467 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:38:48,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:48,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1128477837, now seen corresponding path program 1 times [2020-12-03 12:38:48,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:48,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564675679] [2020-12-03 12:38:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:48,504 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 12:38:48,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672973678] [2020-12-03 12:38:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/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 [2020-12-03 12:38:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:48,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-03 12:38:48,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:38:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:48,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:38:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:48,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564675679] [2020-12-03 12:38:48,747 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:38:48,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672973678] [2020-12-03 12:38:48,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:48,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-12-03 12:38:48,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087998472] [2020-12-03 12:38:48,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 12:38:48,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:48,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 12:38:48,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-03 12:38:48,750 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 8 states. [2020-12-03 12:38:48,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:48,973 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-12-03 12:38:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 12:38:48,974 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2020-12-03 12:38:48,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:48,974 INFO L225 Difference]: With dead ends: 33 [2020-12-03 12:38:48,975 INFO L226 Difference]: Without dead ends: 25 [2020-12-03 12:38:48,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:38:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-03 12:38:48,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-03 12:38:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-03 12:38:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-03 12:38:48,982 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 6 [2020-12-03 12:38:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:48,982 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-03 12:38:48,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 12:38:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-03 12:38:48,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:38:48,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:48,984 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2020-12-03 12:38:49,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-03 12:38:49,212 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:38:49,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:49,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1710175895, now seen corresponding path program 1 times [2020-12-03 12:38:49,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:49,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662754465] [2020-12-03 12:38:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:49,224 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 12:38:49,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611115203] [2020-12-03 12:38:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/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 [2020-12-03 12:38:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:49,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-03 12:38:49,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:38:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:49,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:38:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:49,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662754465] [2020-12-03 12:38:49,349 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:38:49,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611115203] [2020-12-03 12:38:49,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [552512389] [2020-12-03 12:38:49,378 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:38:49,378 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:38:49,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:38:49,389 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:38:49,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:38:49,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:38:49,869 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:38:50,548 WARN L197 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-12-03 12:38:51,212 WARN L197 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2020-12-03 12:38:52,033 WARN L197 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-12-03 12:38:52,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-03 12:38:52,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3] total 9 [2020-12-03 12:38:52,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376291241] [2020-12-03 12:38:52,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:38:52,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:52,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:38:52,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:38:52,049 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2020-12-03 12:38:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:52,144 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-12-03 12:38:52,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:38:52,147 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-03 12:38:52,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:52,147 INFO L225 Difference]: With dead ends: 34 [2020-12-03 12:38:52,147 INFO L226 Difference]: Without dead ends: 23 [2020-12-03 12:38:52,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:38:52,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-03 12:38:52,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-03 12:38:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-03 12:38:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-03 12:38:52,155 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2020-12-03 12:38:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:52,155 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-03 12:38:52,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:38:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-03 12:38:52,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-03 12:38:52,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:52,156 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:38:52,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:38:52,384 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:38:52,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:52,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1523002160, now seen corresponding path program 1 times [2020-12-03 12:38:52,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:52,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832344154] [2020-12-03 12:38:52,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:52,400 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 12:38:52,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953286433] [2020-12-03 12:38:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:38:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:52,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-03 12:38:52,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:38:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:52,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:38:52,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832344154] [2020-12-03 12:38:52,758 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:38:52,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953286433] [2020-12-03 12:38:52,758 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-03 12:38:52,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752954865] [2020-12-03 12:38:52,761 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-03 12:38:52,761 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:38:52,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:38:52,762 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:38:52,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:38:52,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:38:53,124 FATAL L? ?]: Ignoring exception! java.lang.NullPointerException at java.base/java.util.Arrays.stream(Arrays.java:5614) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.AbstractGeneralizedAffineTerm.div(AbstractGeneralizedAffineTerm.java:395) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.constructRhsIntegerQuotient(SolveForSubjectUtils.java:456) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.ExplicitLhsPolynomialRelation.divideByIntegerCoefficient(ExplicitLhsPolynomialRelation.java:224) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubjectWithoutTreatableDivMod(SolveForSubjectUtils.java:110) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:82) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:212) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:401) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:305) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:319) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:223) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:190) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:174) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:141) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryToEliminate(DualJunctionDer.java:119) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:776) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:739) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:656) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:358) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.convert(QuantifierPusher.java:217) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:431) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.convert(QuantifierPusher.java:217) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:431) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.convert(QuantifierPusher.java:217) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:431) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.convert(QuantifierPusher.java:217) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.doit(QuantifierPusher.java:523) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:378) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.convert(QuantifierPusher.java:217) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.eliminate(QuantifierPusher.java:151) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.eliminate(QuantifierPusher.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elimPushPull(PartialQuantifierElimination.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elimPushPull(PartialQuantifierElimination.java:202) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1133) 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) [2020-12-03 12:38:53,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:53,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-03 12:38:53,136 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-03 12:38:53,136 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:38:53,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-03 12:38:53,361 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-03 12:38:53,361 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-03 12:38:53,361 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-03 12:38:53,361 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-03 12:38:53,379 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-03 12:38:53,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:38:53 BoogieIcfgContainer [2020-12-03 12:38:53,379 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:38:53,380 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:38:53,380 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:38:53,380 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:38:53,381 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:38:47" (3/4) ... [2020-12-03 12:38:53,384 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-03 12:38:53,384 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:38:53,385 INFO L168 Benchmark]: Toolchain (without parser) took 6273.62 ms. Allocated memory was 86.0 MB in the beginning and 130.0 MB in the end (delta: 44.0 MB). Free memory was 61.8 MB in the beginning and 87.8 MB in the end (delta: -26.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:53,387 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 86.0 MB. Free memory was 46.6 MB in the beginning and 46.6 MB in the end (delta: 61.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:38:53,387 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.32 ms. Allocated memory is still 86.0 MB. Free memory was 61.6 MB in the beginning and 64.1 MB in the end (delta: -2.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:53,390 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.68 ms. Allocated memory is still 86.0 MB. Free memory was 64.1 MB in the beginning and 62.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:53,394 INFO L168 Benchmark]: Boogie Preprocessor took 23.39 ms. Allocated memory is still 86.0 MB. Free memory was 62.5 MB in the beginning and 61.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:38:53,395 INFO L168 Benchmark]: RCFGBuilder took 439.74 ms. Allocated memory is still 86.0 MB. Free memory was 61.4 MB in the beginning and 43.3 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:53,395 INFO L168 Benchmark]: TraceAbstraction took 5434.91 ms. Allocated memory was 86.0 MB in the beginning and 130.0 MB in the end (delta: 44.0 MB). Free memory was 43.1 MB in the beginning and 87.8 MB in the end (delta: -44.8 MB). Peak memory consumption was 47.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:53,396 INFO L168 Benchmark]: Witness Printer took 4.16 ms. Allocated memory is still 130.0 MB. Free memory is still 87.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:38:53,402 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 86.0 MB. Free memory was 46.6 MB in the beginning and 46.6 MB in the end (delta: 61.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 308.32 ms. Allocated memory is still 86.0 MB. Free memory was 61.6 MB in the beginning and 64.1 MB in the end (delta: -2.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.68 ms. Allocated memory is still 86.0 MB. Free memory was 64.1 MB in the beginning and 62.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.39 ms. Allocated memory is still 86.0 MB. Free memory was 62.5 MB in the beginning and 61.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 439.74 ms. Allocated memory is still 86.0 MB. Free memory was 61.4 MB in the beginning and 43.3 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5434.91 ms. Allocated memory was 86.0 MB in the beginning and 130.0 MB in the end (delta: 44.0 MB). Free memory was 43.1 MB in the beginning and 87.8 MB in the end (delta: -44.8 MB). Peak memory consumption was 47.5 MB. Max. memory is 16.1 GB. * Witness Printer took 4.16 ms. Allocated memory is still 130.0 MB. Free memory is still 87.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_uint() [L16] COND TRUE !cond [L30] B = 1 [L31] q = 0 [L32] r = A [L33] b = B [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND TRUE !(r >= b) [L38] COND TRUE 1 [L19] COND FALSE !(!(cond)) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND FALSE !(r >= b) [L38] COND TRUE 1 [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 5.3s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 41 SDslu, 21 SDs, 0 SdLazy, 46 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 1243 SizeOfPredicates, 13 NumberOfNonLiveVariables, 102 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 8/12 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: OVERALL_TIME[ms]: 492, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 6, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 10, TOOLS_POST_TIME[ms]: 234, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 10, TOOLS_QUANTIFIERELIM_TIME[ms]: 222, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 192, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 21, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 1, DOMAIN_JOIN_TIME[ms]: 54, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 118, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME[ms]: 7, DOMAIN_ISBOTTOM_APPLICATIONS: 6, DOMAIN_ISBOTTOM_TIME[ms]: 21, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 147, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 147, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 4, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 14, DAG_COMPRESSION_PROCESSED_NODES: 47, DAG_COMPRESSION_RETAINED_NODES: 22, 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 [2020-12-03 12:38:55,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:38:55,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:38:55,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:38:55,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:38:55,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:38:55,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:38:55,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:38:55,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:38:55,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:38:55,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:38:56,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:38:56,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:38:56,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:38:56,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:38:56,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:38:56,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:38:56,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:38:56,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:38:56,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:38:56,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:38:56,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:38:56,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:38:56,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:38:56,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:38:56,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:38:56,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:38:56,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:38:56,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:38:56,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:38:56,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:38:56,051 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:38:56,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:38:56,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:38:56,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:38:56,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:38:56,055 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:38:56,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:38:56,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:38:56,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:38:56,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:38:56,059 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-03 12:38:56,088 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:38:56,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:38:56,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:38:56,090 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:38:56,090 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:38:56,090 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:38:56,090 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:38:56,090 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:38:56,091 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:38:56,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:38:56,092 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:38:56,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:38:56,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:38:56,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:38:56,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:38:56,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:38:56,093 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:38:56,093 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-03 12:38:56,093 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-03 12:38:56,093 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:38:56,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:38:56,093 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:38:56,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:38:56,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:38:56,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 12:38:56,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:38:56,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:38:56,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:38:56,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:38:56,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:38:56,095 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-03 12:38:56,095 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-03 12:38:56,095 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:38:56,095 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:38:56,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:38:56,096 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-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d0dd826da977145676f85980fecf0ec40390b47 [2020-12-03 12:38:56,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:38:56,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:38:56,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:38:56,547 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:38:56,547 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:38:56,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i [2020-12-03 12:38:56,634 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/data/db36e6ce9/e27950c713614a8d987ff3500fba3167/FLAG8a0b65633 [2020-12-03 12:38:57,259 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:38:57,260 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i [2020-12-03 12:38:57,268 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/data/db36e6ce9/e27950c713614a8d987ff3500fba3167/FLAG8a0b65633 [2020-12-03 12:38:57,627 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/data/db36e6ce9/e27950c713614a8d987ff3500fba3167 [2020-12-03 12:38:57,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:38:57,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:38:57,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:38:57,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:38:57,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:38:57,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:38:57" (1/1) ... [2020-12-03 12:38:57,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6437e1c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:57, skipping insertion in model container [2020-12-03 12:38:57,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:38:57" (1/1) ... [2020-12-03 12:38:57,650 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:38:57,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:38:57,829 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i[951,964] [2020-12-03 12:38:57,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:38:57,858 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:38:57,874 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i[951,964] [2020-12-03 12:38:57,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:38:57,896 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:38:57,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:57 WrapperNode [2020-12-03 12:38:57,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:38:57,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:38:57,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:38:57,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:38:57,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:57" (1/1) ... [2020-12-03 12:38:57,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:57" (1/1) ... [2020-12-03 12:38:57,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:38:57,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:38:57,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:38:57,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:38:57,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:57" (1/1) ... [2020-12-03 12:38:57,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:57" (1/1) ... [2020-12-03 12:38:57,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:57" (1/1) ... [2020-12-03 12:38:57,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:57" (1/1) ... [2020-12-03 12:38:57,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:57" (1/1) ... [2020-12-03 12:38:57,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:57" (1/1) ... [2020-12-03 12:38:57,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:57" (1/1) ... [2020-12-03 12:38:57,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:38:57,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:38:58,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:38:58,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:38:58,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/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 [2020-12-03 12:38:58,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-03 12:38:58,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:38:58,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:38:58,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:38:58,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:38:58,368 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-03 12:38:58,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:38:58 BoogieIcfgContainer [2020-12-03 12:38:58,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:38:58,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:38:58,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:38:58,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:38:58,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:38:57" (1/3) ... [2020-12-03 12:38:58,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3900077b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:38:58, skipping insertion in model container [2020-12-03 12:38:58,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:57" (2/3) ... [2020-12-03 12:38:58,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3900077b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:38:58, skipping insertion in model container [2020-12-03 12:38:58,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:38:58" (3/3) ... [2020-12-03 12:38:58,380 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound1.i [2020-12-03 12:38:58,397 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:38:58,400 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-03 12:38:58,441 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-03 12:38:58,511 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:38:58,524 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:38:58,524 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:38:58,524 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:38:58,524 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:38:58,524 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:38:58,525 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:38:58,525 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:38:58,547 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-03 12:38:58,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 12:38:58,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:58,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:38:58,562 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:38:58,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:58,570 INFO L82 PathProgramCache]: Analyzing trace with hash 119520859, now seen corresponding path program 1 times [2020-12-03 12:38:58,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:38:58,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999209478] [2020-12-03 12:38:58,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/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 [2020-12-03 12:38:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:58,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-03 12:38:58,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:38:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:58,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:38:58,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999209478] [2020-12-03 12:38:58,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:58,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:38:58,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760547114] [2020-12-03 12:38:58,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 12:38:58,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:38:58,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 12:38:58,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 12:38:58,802 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-03 12:38:58,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:58,837 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-12-03 12:38:58,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 12:38:58,839 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-03 12:38:58,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:58,851 INFO L225 Difference]: With dead ends: 37 [2020-12-03 12:38:58,852 INFO L226 Difference]: Without dead ends: 16 [2020-12-03 12:38:58,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 12:38:58,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-03 12:38:58,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-03 12:38:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-03 12:38:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-03 12:38:58,892 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-12-03 12:38:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:58,894 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-03 12:38:58,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 12:38:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-03 12:38:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-03 12:38:58,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:58,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:38:59,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-03 12:38:59,117 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:38:59,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:59,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1186643548, now seen corresponding path program 1 times [2020-12-03 12:38:59,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:38:59,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105040461] [2020-12-03 12:38:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/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 [2020-12-03 12:38:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:59,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-03 12:38:59,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:38:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:59,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:38:59,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105040461] [2020-12-03 12:38:59,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:59,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-03 12:38:59,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30317671] [2020-12-03 12:38:59,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 12:38:59,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:38:59,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 12:38:59,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:38:59,524 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-12-03 12:39:00,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:39:00,072 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-12-03 12:39:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 12:39:00,073 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-03 12:39:00,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:39:00,074 INFO L225 Difference]: With dead ends: 29 [2020-12-03 12:39:00,074 INFO L226 Difference]: Without dead ends: 23 [2020-12-03 12:39:00,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:39:00,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-03 12:39:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-12-03 12:39:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-03 12:39:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-03 12:39:00,081 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 9 [2020-12-03 12:39:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:39:00,082 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-03 12:39:00,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 12:39:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-03 12:39:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-03 12:39:00,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:39:00,083 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:39:00,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-03 12:39:00,284 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:39:00,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:39:00,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2054849417, now seen corresponding path program 1 times [2020-12-03 12:39:00,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:39:00,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826139333] [2020-12-03 12:39:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/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 [2020-12-03 12:39:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:39:00,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-03 12:39:00,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:39:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:39:00,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:39:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:39:00,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826139333] [2020-12-03 12:39:00,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-03 12:39:00,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2020-12-03 12:39:00,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765597739] [2020-12-03 12:39:00,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:39:00,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:39:00,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:39:00,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:39:00,652 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 6 states. [2020-12-03 12:39:00,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:39:00,654 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-03 12:39:00,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 12:39:00,654 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-03 12:39:00,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:39:00,654 INFO L225 Difference]: With dead ends: 21 [2020-12-03 12:39:00,655 INFO L226 Difference]: Without dead ends: 0 [2020-12-03 12:39:00,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:39:00,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-03 12:39:00,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-03 12:39:00,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-03 12:39:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-03 12:39:00,657 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-12-03 12:39:00,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:39:00,657 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-03 12:39:00,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:39:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-03 12:39:00,658 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-03 12:39:00,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-03 12:39:00,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-03 12:39:00,919 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2020-12-03 12:39:00,919 INFO L262 CegarLoopResult]: For program point L19(lines 19 22) no Hoare annotation was computed. [2020-12-03 12:39:00,920 INFO L258 CegarLoopResult]: At program point L19-2(line 40) the Hoare annotation is: false [2020-12-03 12:39:00,920 INFO L262 CegarLoopResult]: For program point L19-3(lines 19 22) no Hoare annotation was computed. [2020-12-03 12:39:00,920 INFO L262 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-12-03 12:39:00,920 INFO L265 CegarLoopResult]: At program point L19-5(lines 18 24) the Hoare annotation is: true [2020-12-03 12:39:00,921 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-03 12:39:00,921 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-03 12:39:00,921 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-03 12:39:00,921 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2020-12-03 12:39:00,921 INFO L262 CegarLoopResult]: For program point L20(lines 20 21) no Hoare annotation was computed. [2020-12-03 12:39:00,922 INFO L262 CegarLoopResult]: For program point L20-1(lines 20 21) no Hoare annotation was computed. [2020-12-03 12:39:00,922 INFO L265 CegarLoopResult]: At program point L49(lines 25 50) the Hoare annotation is: true [2020-12-03 12:39:00,922 INFO L262 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-12-03 12:39:00,922 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-03 12:39:00,922 INFO L262 CegarLoopResult]: For program point L38-1(lines 38 47) no Hoare annotation was computed. [2020-12-03 12:39:00,923 INFO L258 CegarLoopResult]: At program point L34-2(lines 34 37) the Hoare annotation is: false [2020-12-03 12:39:00,923 INFO L262 CegarLoopResult]: For program point L43(lines 43 46) no Hoare annotation was computed. [2020-12-03 12:39:00,923 INFO L262 CegarLoopResult]: For program point L43-2(lines 25 50) no Hoare annotation was computed. [2020-12-03 12:39:00,923 INFO L262 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-12-03 12:39:00,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:39:00 BoogieIcfgContainer [2020-12-03 12:39:00,932 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:39:00,932 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:39:00,933 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:39:00,933 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:39:00,934 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:38:58" (3/4) ... [2020-12-03 12:39:00,937 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-03 12:39:00,948 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-03 12:39:00,948 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-03 12:39:00,949 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-03 12:39:00,949 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-03 12:39:00,994 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2912d991-59aa-46ba-b575-5fba69e38f2a/bin/utaipan/witness.graphml [2020-12-03 12:39:00,994 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:39:00,996 INFO L168 Benchmark]: Toolchain (without parser) took 3364.09 ms. Allocated memory was 54.5 MB in the beginning and 86.0 MB in the end (delta: 31.5 MB). Free memory was 32.6 MB in the beginning and 54.9 MB in the end (delta: -22.4 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. [2020-12-03 12:39:00,997 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 54.5 MB. Free memory was 37.6 MB in the beginning and 37.6 MB in the end (delta: 37.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:39:00,997 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.29 ms. Allocated memory is still 54.5 MB. Free memory was 32.4 MB in the beginning and 35.7 MB in the end (delta: -3.4 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2020-12-03 12:39:00,998 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.62 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 35.7 MB in the beginning and 51.8 MB in the end (delta: -16.1 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2020-12-03 12:39:00,999 INFO L168 Benchmark]: Boogie Preprocessor took 58.21 ms. Allocated memory is still 67.1 MB. Free memory was 51.8 MB in the beginning and 50.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:39:00,999 INFO L168 Benchmark]: RCFGBuilder took 371.63 ms. Allocated memory is still 67.1 MB. Free memory was 50.6 MB in the beginning and 37.5 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-03 12:39:01,000 INFO L168 Benchmark]: TraceAbstraction took 2559.66 ms. Allocated memory was 67.1 MB in the beginning and 86.0 MB in the end (delta: 18.9 MB). Free memory was 37.1 MB in the beginning and 57.6 MB in the end (delta: -20.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:39:01,000 INFO L168 Benchmark]: Witness Printer took 61.85 ms. Allocated memory is still 86.0 MB. Free memory was 57.6 MB in the beginning and 54.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:39:01,004 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 54.5 MB. Free memory was 37.6 MB in the beginning and 37.6 MB in the end (delta: 37.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 265.29 ms. Allocated memory is still 54.5 MB. Free memory was 32.4 MB in the beginning and 35.7 MB in the end (delta: -3.4 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.62 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 35.7 MB in the beginning and 51.8 MB in the end (delta: -16.1 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.21 ms. Allocated memory is still 67.1 MB. Free memory was 51.8 MB in the beginning and 50.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 371.63 ms. Allocated memory is still 67.1 MB. Free memory was 50.6 MB in the beginning and 37.5 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2559.66 ms. Allocated memory was 67.1 MB in the beginning and 86.0 MB in the end (delta: 18.9 MB). Free memory was 37.1 MB in the beginning and 57.6 MB in the end (delta: -20.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 61.85 ms. Allocated memory is still 86.0 MB. Free memory was 57.6 MB in the beginning and 54.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 50 SDslu, 24 SDs, 0 SdLazy, 43 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 6 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 1777 SizeOfPredicates, 17 NumberOfNonLiveVariables, 95 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/4 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 correct! Received shutdown request...