./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test25-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test25-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5d33db1882917813547794c8974f871f0a78640e .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:18:19,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:18:19,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:18:19,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:18:19,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:18:19,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:18:19,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:18:19,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:18:19,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:18:19,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:18:19,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:18:19,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:18:19,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:18:19,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:18:19,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:18:19,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:18:19,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:18:19,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:18:19,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:18:19,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:18:19,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:18:19,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:18:19,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:18:19,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:18:19,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:18:19,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:18:19,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:18:19,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:18:19,699 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:18:19,700 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:18:19,700 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:18:19,701 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:18:19,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:18:19,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:18:19,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:18:19,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:18:19,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:18:19,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:18:19,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:18:19,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:18:19,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:18:19,707 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:18:19,731 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:18:19,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:18:19,742 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:18:19,742 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:18:19,742 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:18:19,743 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:18:19,743 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:18:19,743 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:18:19,743 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:18:19,743 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:18:19,744 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:18:19,744 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:18:19,744 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:18:19,744 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:18:19,744 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:18:19,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:18:19,746 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:18:19,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:18:19,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:18:19,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:18:19,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:18:19,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:18:19,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:18:19,748 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:18:19,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:18:19,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:18:19,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:18:19,749 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:18:19,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:18:19,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:18:19,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:18:19,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:18:19,750 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:18:19,750 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:18:19,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:18:19,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:18:19,751 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:18:19,751 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/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(__VERIFIER_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 -> 5d33db1882917813547794c8974f871f0a78640e [2019-11-26 02:18:19,914 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:18:19,925 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:18:19,930 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:18:19,936 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:18:19,942 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:18:19,943 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/bin/utaipan/../../sv-benchmarks/c/ldv-regression/test25-2.c [2019-11-26 02:18:20,003 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/bin/utaipan/data/47cce2faf/2af74380c26746c88345f872bc9287d3/FLAGd2e61d345 [2019-11-26 02:18:20,386 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:18:20,387 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/sv-benchmarks/c/ldv-regression/test25-2.c [2019-11-26 02:18:20,390 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/bin/utaipan/data/47cce2faf/2af74380c26746c88345f872bc9287d3/FLAGd2e61d345 [2019-11-26 02:18:20,400 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/bin/utaipan/data/47cce2faf/2af74380c26746c88345f872bc9287d3 [2019-11-26 02:18:20,402 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:18:20,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:18:20,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:18:20,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:18:20,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:18:20,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:18:20" (1/1) ... [2019-11-26 02:18:20,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fc8f6a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:20, skipping insertion in model container [2019-11-26 02:18:20,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:18:20" (1/1) ... [2019-11-26 02:18:20,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:18:20,431 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:18:20,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:18:20,725 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:18:20,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:18:20,757 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:18:20,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:20 WrapperNode [2019-11-26 02:18:20,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:18:20,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:18:20,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:18:20,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:18:20,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:20" (1/1) ... [2019-11-26 02:18:20,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:20" (1/1) ... [2019-11-26 02:18:20,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:18:20,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:18:20,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:18:20,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:18:20,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:20" (1/1) ... [2019-11-26 02:18:20,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:20" (1/1) ... [2019-11-26 02:18:20,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:20" (1/1) ... [2019-11-26 02:18:20,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:20" (1/1) ... [2019-11-26 02:18:20,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:20" (1/1) ... [2019-11-26 02:18:20,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:20" (1/1) ... [2019-11-26 02:18:20,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:20" (1/1) ... [2019-11-26 02:18:20,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:18:20,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:18:20,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:18:20,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:18:20,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/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 [2019-11-26 02:18:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-26 02:18:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-26 02:18:20,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:18:20,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:18:20,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-26 02:18:20,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-26 02:18:20,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:18:20,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:18:21,197 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:18:21,198 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-26 02:18:21,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:18:21 BoogieIcfgContainer [2019-11-26 02:18:21,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:18:21,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:18:21,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:18:21,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:18:21,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:18:20" (1/3) ... [2019-11-26 02:18:21,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4e79bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:18:21, skipping insertion in model container [2019-11-26 02:18:21,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:20" (2/3) ... [2019-11-26 02:18:21,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4e79bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:18:21, skipping insertion in model container [2019-11-26 02:18:21,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:18:21" (3/3) ... [2019-11-26 02:18:21,205 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-2.c [2019-11-26 02:18:21,214 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:18:21,231 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:18:21,241 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:18:21,268 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:18:21,268 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:18:21,269 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:18:21,269 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:18:21,269 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:18:21,269 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:18:21,269 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:18:21,270 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:18:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-11-26 02:18:21,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:18:21,284 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:18:21,285 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:18:21,285 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:18:21,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:18:21,289 INFO L82 PathProgramCache]: Analyzing trace with hash -747952373, now seen corresponding path program 1 times [2019-11-26 02:18:21,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:18:21,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813536774] [2019-11-26 02:18:21,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:18:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:21,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813536774] [2019-11-26 02:18:21,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:18:21,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 02:18:21,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37485340] [2019-11-26 02:18:21,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:18:21,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:18:21,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:18:21,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:18:21,434 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2019-11-26 02:18:21,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:18:21,463 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2019-11-26 02:18:21,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:18:21,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-26 02:18:21,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:18:21,473 INFO L225 Difference]: With dead ends: 25 [2019-11-26 02:18:21,473 INFO L226 Difference]: Without dead ends: 11 [2019-11-26 02:18:21,475 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:18:21,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-26 02:18:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-26 02:18:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-26 02:18:21,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-26 02:18:21,499 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2019-11-26 02:18:21,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:18:21,499 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-26 02:18:21,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:18:21,500 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-26 02:18:21,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:18:21,500 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:18:21,500 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:18:21,500 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:18:21,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:18:21,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1728309126, now seen corresponding path program 1 times [2019-11-26 02:18:21,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:18:21,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635896846] [2019-11-26 02:18:21,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:18:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:21,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635896846] [2019-11-26 02:18:21,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438802977] [2019-11-26 02:18:21,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/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 [2019-11-26 02:18:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:21,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:18:21,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:21,653 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:18:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:21,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [871038864] [2019-11-26 02:18:21,712 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-26 02:18:21,712 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:18:21,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:18:21,724 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:18:21,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:18:22,775 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:18:23,114 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2019-11-26 02:18:23,305 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2019-11-26 02:18:23,483 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2019-11-26 02:18:23,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:18:23,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 10 [2019-11-26 02:18:23,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57288121] [2019-11-26 02:18:23,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:18:23,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:18:23,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:18:23,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:18:23,487 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2019-11-26 02:18:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:18:23,545 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2019-11-26 02:18:23,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:18:23,546 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-26 02:18:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:18:23,547 INFO L225 Difference]: With dead ends: 17 [2019-11-26 02:18:23,547 INFO L226 Difference]: Without dead ends: 13 [2019-11-26 02:18:23,548 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:18:23,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-26 02:18:23,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-26 02:18:23,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-26 02:18:23,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-26 02:18:23,551 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-11-26 02:18:23,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:18:23,551 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-26 02:18:23,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:18:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-26 02:18:23,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:18:23,552 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:18:23,552 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:18:23,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:18:23,753 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:18:23,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:18:23,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1218964959, now seen corresponding path program 1 times [2019-11-26 02:18:23,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:18:23,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986710273] [2019-11-26 02:18:23,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:18:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:18:23,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986710273] [2019-11-26 02:18:23,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982728765] [2019-11-26 02:18:23,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/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 [2019-11-26 02:18:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:23,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:18:23,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:18:23,848 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:18:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:18:23,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [495922145] [2019-11-26 02:18:23,862 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-26 02:18:23,862 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:18:23,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:18:23,863 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:18:23,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:18:24,610 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:18:24,749 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2019-11-26 02:18:25,073 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2019-11-26 02:18:25,312 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2019-11-26 02:18:25,314 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:18:25,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:18:25,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2019-11-26 02:18:25,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812204662] [2019-11-26 02:18:25,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:18:25,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:18:25,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:18:25,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:18:25,316 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2019-11-26 02:18:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:18:25,341 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-11-26 02:18:25,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:18:25,343 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-26 02:18:25,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:18:25,343 INFO L225 Difference]: With dead ends: 26 [2019-11-26 02:18:25,343 INFO L226 Difference]: Without dead ends: 16 [2019-11-26 02:18:25,344 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:18:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-26 02:18:25,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-26 02:18:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-26 02:18:25,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-26 02:18:25,347 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2019-11-26 02:18:25,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:18:25,348 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-26 02:18:25,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:18:25,348 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-26 02:18:25,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:18:25,349 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:18:25,349 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:18:25,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:18:25,550 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:18:25,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:18:25,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1875578676, now seen corresponding path program 2 times [2019-11-26 02:18:25,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:18:25,550 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348760125] [2019-11-26 02:18:25,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:18:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:18:25,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348760125] [2019-11-26 02:18:25,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794057802] [2019-11-26 02:18:25,661 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/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 [2019-11-26 02:18:25,727 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-26 02:18:25,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:18:25,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-26 02:18:25,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-26 02:18:25,822 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:18:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-26 02:18:25,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266409571] [2019-11-26 02:18:25,895 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-26 02:18:25,895 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:18:25,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:18:25,896 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:18:25,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:18:26,497 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:18:26,633 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2019-11-26 02:18:26,970 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2019-11-26 02:18:27,278 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:18:27,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:18:27,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2019-11-26 02:18:27,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133944434] [2019-11-26 02:18:27,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:18:27,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:18:27,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:18:27,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2019-11-26 02:18:27,280 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 14 states. [2019-11-26 02:18:27,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:18:27,498 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2019-11-26 02:18:27,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-26 02:18:27,498 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2019-11-26 02:18:27,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:18:27,499 INFO L225 Difference]: With dead ends: 33 [2019-11-26 02:18:27,499 INFO L226 Difference]: Without dead ends: 23 [2019-11-26 02:18:27,500 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2019-11-26 02:18:27,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-26 02:18:27,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-26 02:18:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-26 02:18:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-26 02:18:27,504 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2019-11-26 02:18:27,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:18:27,505 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-26 02:18:27,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:18:27,505 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-26 02:18:27,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-26 02:18:27,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:18:27,506 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:18:27,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:18:27,709 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:18:27,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:18:27,709 INFO L82 PathProgramCache]: Analyzing trace with hash 398796338, now seen corresponding path program 3 times [2019-11-26 02:18:27,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:18:27,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429132187] [2019-11-26 02:18:27,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:18:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-26 02:18:27,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429132187] [2019-11-26 02:18:27,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67843361] [2019-11-26 02:18:27,813 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:18:27,871 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-26 02:18:27,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:18:27,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-26 02:18:27,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-26 02:18:28,098 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:18:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-26 02:18:28,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1554150923] [2019-11-26 02:18:28,229 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-26 02:18:28,229 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:18:28,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:18:28,229 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:18:28,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:18:28,771 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:18:28,911 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2019-11-26 02:18:29,281 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2019-11-26 02:18:29,550 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:18:29,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:18:29,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2019-11-26 02:18:29,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960606166] [2019-11-26 02:18:29,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-26 02:18:29,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:18:29,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-26 02:18:29,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2019-11-26 02:18:29,552 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 21 states. [2019-11-26 02:18:39,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:18:39,944 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2019-11-26 02:18:39,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-26 02:18:39,945 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2019-11-26 02:18:39,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:18:39,945 INFO L225 Difference]: With dead ends: 52 [2019-11-26 02:18:39,946 INFO L226 Difference]: Without dead ends: 36 [2019-11-26 02:18:39,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2019-11-26 02:18:39,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-26 02:18:39,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-26 02:18:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-26 02:18:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-11-26 02:18:39,959 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 22 [2019-11-26 02:18:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:18:39,959 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-11-26 02:18:39,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-26 02:18:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-11-26 02:18:39,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-26 02:18:39,960 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:18:39,961 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:18:40,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:18:40,161 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:18:40,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:18:40,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1721469383, now seen corresponding path program 4 times [2019-11-26 02:18:40,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:18:40,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767730216] [2019-11-26 02:18:40,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:18:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-26 02:18:40,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767730216] [2019-11-26 02:18:40,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532831201] [2019-11-26 02:18:40,276 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:18:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:40,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:18:40,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-26 02:18:40,348 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:18:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-26 02:18:40,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1695010451] [2019-11-26 02:18:40,407 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-26 02:18:40,407 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:18:40,407 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:18:40,407 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:18:40,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:18:40,986 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:18:41,564 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:18:41,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:18:41,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2019-11-26 02:18:41,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661923943] [2019-11-26 02:18:41,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-26 02:18:41,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:18:41,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-26 02:18:41,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-11-26 02:18:41,566 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2019-11-26 02:18:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:18:41,597 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2019-11-26 02:18:41,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-26 02:18:41,598 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-26 02:18:41,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:18:41,598 INFO L225 Difference]: With dead ends: 68 [2019-11-26 02:18:41,598 INFO L226 Difference]: Without dead ends: 40 [2019-11-26 02:18:41,599 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 16 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-11-26 02:18:41,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-26 02:18:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-26 02:18:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-26 02:18:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-11-26 02:18:41,605 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2019-11-26 02:18:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:18:41,605 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-11-26 02:18:41,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-26 02:18:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-11-26 02:18:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-26 02:18:41,606 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:18:41,606 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:18:41,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:18:41,809 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:18:41,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:18:41,810 INFO L82 PathProgramCache]: Analyzing trace with hash 914648327, now seen corresponding path program 5 times [2019-11-26 02:18:41,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:18:41,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389028492] [2019-11-26 02:18:41,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:18:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:42,568 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2019-11-26 02:18:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-26 02:18:43,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389028492] [2019-11-26 02:18:43,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356672448] [2019-11-26 02:18:43,534 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:18:43,614 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-26 02:18:43,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:18:43,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-26 02:18:43,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-26 02:18:43,897 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:18:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-26 02:18:44,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [579210004] [2019-11-26 02:18:44,087 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-26 02:18:44,087 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:18:44,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:18:44,088 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:18:44,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:18:44,672 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:18:45,213 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2019-11-26 02:18:45,932 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:18:45,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:18:45,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8, 8] total 31 [2019-11-26 02:18:45,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988552696] [2019-11-26 02:18:45,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-26 02:18:45,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:18:45,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-26 02:18:45,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2019-11-26 02:18:45,934 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 31 states. [2019-11-26 02:18:46,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:18:46,438 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2019-11-26 02:18:46,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-26 02:18:46,438 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2019-11-26 02:18:46,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:18:46,438 INFO L225 Difference]: With dead ends: 40 [2019-11-26 02:18:46,438 INFO L226 Difference]: Without dead ends: 0 [2019-11-26 02:18:46,439 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 94 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2019-11-26 02:18:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-26 02:18:46,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-26 02:18:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-26 02:18:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-26 02:18:46,440 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2019-11-26 02:18:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:18:46,440 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-26 02:18:46,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-26 02:18:46,440 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-26 02:18:46,440 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-26 02:18:46,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:18:46,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-26 02:18:46,753 INFO L440 ceAbstractionStarter]: At program point L27-3(lines 27 30) the Hoare annotation is: (and (<= 0 |#StackHeapBarrier|) (<= 0 (+ ULTIMATE.start_main_~i~0 2147483648)) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#cont~0.base|) (<= |ULTIMATE.start_main_~#array~0.offset| 0) (<= 0 |#NULL.base|) (<= 0 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array~0.offset|) (<= 0 |ULTIMATE.start_main_~#array~0.base|) (= 0 |ULTIMATE.start_main_~#cont~0.offset|)) [2019-11-26 02:18:46,753 INFO L444 ceAbstractionStarter]: For program point L27-4(lines 21 50) no Hoare annotation was computed. [2019-11-26 02:18:46,753 INFO L444 ceAbstractionStarter]: For program point L40(lines 40 42) no Hoare annotation was computed. [2019-11-26 02:18:46,753 INFO L444 ceAbstractionStarter]: For program point L32(lines 32 44) no Hoare annotation was computed. [2019-11-26 02:18:46,753 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-26 02:18:46,754 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 48) no Hoare annotation was computed. [2019-11-26 02:18:46,754 INFO L447 ceAbstractionStarter]: At program point L49(lines 20 50) the Hoare annotation is: true [2019-11-26 02:18:46,754 INFO L440 ceAbstractionStarter]: At program point L41(lines 21 50) the Hoare annotation is: false [2019-11-26 02:18:46,754 INFO L444 ceAbstractionStarter]: For program point L37-1(lines 37 39) no Hoare annotation was computed. [2019-11-26 02:18:46,754 INFO L440 ceAbstractionStarter]: At program point L37-3(lines 37 39) the Hoare annotation is: (and (= ULTIMATE.start_main_~pa~0.offset (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#cont~0.base|) |ULTIMATE.start_main_~#cont~0.offset|) 4)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#cont~0.base|) |ULTIMATE.start_main_~#cont~0.offset|) ULTIMATE.start_main_~pa~0.base) (<= ULTIMATE.start_main_~i~0 (select (select |#memory_int| ULTIMATE.start_main_~pa~0.base) ULTIMATE.start_main_~pa~0.offset)) (= 0 |ULTIMATE.start_main_~#cont~0.offset|)) [2019-11-26 02:18:46,754 INFO L440 ceAbstractionStarter]: At program point L37-4(lines 37 39) the Hoare annotation is: (let ((.cse2 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#cont~0.base|) |ULTIMATE.start_main_~#cont~0.offset|)) (.cse1 (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#cont~0.base|) |ULTIMATE.start_main_~#cont~0.offset|) 4))) (let ((.cse0 (select (select |#memory_int| .cse2) .cse1))) (and (<= .cse0 ULTIMATE.start_main_~i~0) (= ULTIMATE.start_main_~pa~0.offset .cse1) (= .cse2 ULTIMATE.start_main_~pa~0.base) (<= ULTIMATE.start_main_~i~0 .cse0) (= 0 |ULTIMATE.start_main_~#cont~0.offset|)))) [2019-11-26 02:18:46,754 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-26 02:18:46,754 INFO L444 ceAbstractionStarter]: For program point L35(lines 35 43) no Hoare annotation was computed. [2019-11-26 02:18:46,761 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-11-26 02:18:46,762 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-11-26 02:18:46,762 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-11-26 02:18:46,763 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-11-26 02:18:46,763 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-11-26 02:18:46,763 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-11-26 02:18:46,764 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-26 02:18:46,764 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,765 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,765 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,765 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,765 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-26 02:18:46,765 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,765 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,766 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-11-26 02:18:46,766 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-11-26 02:18:46,767 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-11-26 02:18:46,767 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-11-26 02:18:46,767 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-11-26 02:18:46,767 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-11-26 02:18:46,768 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-26 02:18:46,768 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,768 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,768 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,769 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,769 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-26 02:18:46,769 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,769 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,770 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-11-26 02:18:46,770 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-11-26 02:18:46,771 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,771 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,771 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-26 02:18:46,771 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-11-26 02:18:46,771 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-11-26 02:18:46,772 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,772 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,772 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-26 02:18:46,774 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:18:46,775 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:18:46,775 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:18:46,775 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:18:46,776 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:18:46,776 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:18:46,776 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:18:46,777 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:18:46,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:18:46 BoogieIcfgContainer [2019-11-26 02:18:46,779 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:18:46,780 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:18:46,780 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:18:46,780 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:18:46,780 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:18:21" (3/4) ... [2019-11-26 02:18:46,783 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-26 02:18:46,792 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2019-11-26 02:18:46,792 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-26 02:18:46,793 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-26 02:18:46,835 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cc9c1fdb-bf78-4edb-8f7f-e15bc4bc8319/bin/utaipan/witness.graphml [2019-11-26 02:18:46,835 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:18:46,837 INFO L168 Benchmark]: Toolchain (without parser) took 26434.08 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 260.6 MB). Free memory was 946.1 MB in the beginning and 944.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 262.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:18:46,837 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:18:46,837 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 946.1 MB in the beginning and 1.2 GB in the end (delta: -211.4 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:18:46,838 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.08 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:18:46,838 INFO L168 Benchmark]: Boogie Preprocessor took 25.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:18:46,838 INFO L168 Benchmark]: RCFGBuilder took 376.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:18:46,839 INFO L168 Benchmark]: TraceAbstraction took 25579.54 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 98.0 MB). Free memory was 1.1 GB in the beginning and 954.5 MB in the end (delta: 173.8 MB). Peak memory consumption was 271.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:18:46,839 INFO L168 Benchmark]: Witness Printer took 55.99 ms. Allocated memory is still 1.3 GB. Free memory was 954.5 MB in the beginning and 944.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:18:46,841 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 354.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 946.1 MB in the beginning and 1.2 GB in the end (delta: -211.4 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 38.08 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 376.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 25579.54 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 98.0 MB). Free memory was 1.1 GB in the beginning and 954.5 MB in the end (delta: 173.8 MB). Peak memory consumption was 271.9 MB. Max. memory is 11.5 GB. * Witness Printer took 55.99 ms. Allocated memory is still 1.3 GB. Free memory was 954.5 MB in the beginning and 944.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 48]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant [2019-11-26 02:18:46,851 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-11-26 02:18:46,852 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-11-26 02:18:46,852 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-11-26 02:18:46,852 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-11-26 02:18:46,852 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-11-26 02:18:46,853 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-11-26 02:18:46,853 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-26 02:18:46,853 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,854 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,854 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,854 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,854 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-26 02:18:46,854 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,855 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,855 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-11-26 02:18:46,855 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-11-26 02:18:46,856 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-11-26 02:18:46,856 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-11-26 02:18:46,856 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-11-26 02:18:46,856 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-11-26 02:18:46,857 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-26 02:18:46,857 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,857 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,858 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,858 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,858 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-26 02:18:46,858 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,858 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ Derived loop invariant: (((unknown-#memory_int-unknown[#memory_$Pointer$[cont][cont]][#memory_$Pointer$[cont][cont] + 4] <= i && pa == #memory_$Pointer$[cont][cont] + 4) && #memory_$Pointer$[cont][cont] == pa) && i <= unknown-#memory_int-unknown[#memory_$Pointer$[cont][cont]][#memory_$Pointer$[cont][cont] + 4]) && 0 == cont - InvariantResult [Line: 37]: Loop Invariant [2019-11-26 02:18:46,859 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-11-26 02:18:46,859 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-11-26 02:18:46,860 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,860 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,860 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-26 02:18:46,860 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-11-26 02:18:46,861 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-11-26 02:18:46,861 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,861 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-11-26 02:18:46,861 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((pa == #memory_$Pointer$[cont][cont] + 4 && #memory_$Pointer$[cont][cont] == pa) && i <= unknown-#memory_int-unknown[pa][pa]) && 0 == cont - InvariantResult [Line: 27]: Loop Invariant [2019-11-26 02:18:46,862 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:18:46,862 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:18:46,863 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:18:46,863 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:18:46,863 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:18:46,864 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:18:46,864 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:18:46,864 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL Derived loop invariant: ((((((((((0 <= unknown-#StackHeapBarrier-unknown && 0 <= i + 2147483648) && #NULL <= 0) && 0 <= cont) && array <= 0) && 0 <= #NULL) && 0 <= j) && i <= 2147483647) && #NULL == 0) && 0 <= array) && 0 <= array) && 0 == cont - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Result: SAFE, OverallTime: 25.4s, OverallIterations: 7, TraceHistogramMax: 11, AutomataDifference: 11.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 56 SDtfs, 32 SDslu, 181 SDs, 0 SdLazy, 359 SolverSat, 41 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 467 GetRequests, 288 SyntacticMatches, 43 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 13.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=6, 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 28 NumberOfFragments, 122 HoareAnnotationTreeSize, 5 FomulaSimplifications, 967 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 197 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 274 NumberOfCodeBlocks, 243 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 388 ConstructedInterpolants, 12 QuantifiedInterpolants, 95547 SizeOfPredicates, 69 NumberOfNonLiveVariables, 625 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 735/1041 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 1064, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 7, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME[ms]: 840, 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: 9, TOOLS_QUANTIFIERELIM_TIME[ms]: 831, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 328, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 23, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 149, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 13, DOMAIN_ISBOTTOM_APPLICATIONS: 7, DOMAIN_ISBOTTOM_TIME[ms]: 13, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 790, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 790, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, 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]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 11, DAG_COMPRESSION_PROCESSED_NODES: 72, DAG_COMPRESSION_RETAINED_NODES: 26, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...