./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 20f541ceeb4d88c1ded29d751212bcde5b7dc0f0 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 11:01:46,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 11:01:46,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 11:01:46,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 11:01:46,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 11:01:46,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 11:01:46,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 11:01:46,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 11:01:46,728 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 11:01:46,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 11:01:46,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 11:01:46,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 11:01:46,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 11:01:46,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 11:01:46,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 11:01:46,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 11:01:46,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 11:01:46,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 11:01:46,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 11:01:46,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 11:01:46,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 11:01:46,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 11:01:46,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 11:01:46,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 11:01:46,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 11:01:46,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 11:01:46,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 11:01:46,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 11:01:46,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 11:01:46,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 11:01:46,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 11:01:46,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 11:01:46,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 11:01:46,744 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 11:01:46,745 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 11:01:46,745 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 11:01:46,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 11:01:46,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 11:01:46,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 11:01:46,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 11:01:46,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 11:01:46,747 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2019-12-07 11:01:46,757 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 11:01:46,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 11:01:46,758 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 11:01:46,758 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 11:01:46,758 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 11:01:46,758 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 11:01:46,758 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 11:01:46,758 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 11:01:46,759 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 11:01:46,759 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 11:01:46,759 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 11:01:46,759 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 11:01:46,759 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 11:01:46,759 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 11:01:46,759 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 11:01:46,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 11:01:46,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 11:01:46,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 11:01:46,760 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 11:01:46,760 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 11:01:46,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 11:01:46,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 11:01:46,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 11:01:46,761 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 11:01:46,761 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 11:01:46,761 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 11:01:46,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 11:01:46,761 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 11:01:46,762 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 11:01:46,762 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 11:01:46,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 11:01:46,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 11:01:46,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 11:01:46,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:01:46,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 11:01:46,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 11:01:46,763 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 11:01:46,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 11:01:46,763 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 11:01:46,763 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 11:01:46,763 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_7277e692-44d0-4597-b1bc-e13fe905e8bb/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 20f541ceeb4d88c1ded29d751212bcde5b7dc0f0 [2019-12-07 11:01:46,861 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 11:01:46,869 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 11:01:46,871 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 11:01:46,872 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 11:01:46,872 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 11:01:46,872 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/../../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i [2019-12-07 11:01:46,909 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/data/44c9535f6/74c99f4a865047c3b53cf193e5d44b22/FLAG1ad25ae37 [2019-12-07 11:01:47,313 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 11:01:47,314 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/sv-benchmarks/c/array-memsafety/subseq-alloca-2.i [2019-12-07 11:01:47,323 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/data/44c9535f6/74c99f4a865047c3b53cf193e5d44b22/FLAG1ad25ae37 [2019-12-07 11:01:47,668 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/data/44c9535f6/74c99f4a865047c3b53cf193e5d44b22 [2019-12-07 11:01:47,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 11:01:47,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 11:01:47,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 11:01:47,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 11:01:47,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 11:01:47,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:01:47" (1/1) ... [2019-12-07 11:01:47,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e43617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:01:47, skipping insertion in model container [2019-12-07 11:01:47,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:01:47" (1/1) ... [2019-12-07 11:01:47,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 11:01:47,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 11:01:47,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:01:47,912 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 11:01:47,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:01:47,972 INFO L208 MainTranslator]: Completed translation [2019-12-07 11:01:47,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:01:47 WrapperNode [2019-12-07 11:01:47,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 11:01:47,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 11:01:47,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 11:01:47,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 11:01:47,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:01:47" (1/1) ... [2019-12-07 11:01:47,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:01:47" (1/1) ... [2019-12-07 11:01:48,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 11:01:48,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 11:01:48,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 11:01:48,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 11:01:48,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:01:47" (1/1) ... [2019-12-07 11:01:48,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:01:47" (1/1) ... [2019-12-07 11:01:48,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:01:47" (1/1) ... [2019-12-07 11:01:48,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:01:47" (1/1) ... [2019-12-07 11:01:48,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:01:47" (1/1) ... [2019-12-07 11:01:48,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:01:47" (1/1) ... [2019-12-07 11:01:48,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:01:47" (1/1) ... [2019-12-07 11:01:48,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 11:01:48,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 11:01:48,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 11:01:48,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 11:01:48,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:01:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/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 [2019-12-07 11:01:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 11:01:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 11:01:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 11:01:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 11:01:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 11:01:48,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 11:01:48,371 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 11:01:48,371 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 11:01:48,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:01:48 BoogieIcfgContainer [2019-12-07 11:01:48,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 11:01:48,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 11:01:48,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 11:01:48,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 11:01:48,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 11:01:47" (1/3) ... [2019-12-07 11:01:48,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@371423d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:01:48, skipping insertion in model container [2019-12-07 11:01:48,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:01:47" (2/3) ... [2019-12-07 11:01:48,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@371423d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:01:48, skipping insertion in model container [2019-12-07 11:01:48,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:01:48" (3/3) ... [2019-12-07 11:01:48,377 INFO L109 eAbstractionObserver]: Analyzing ICFG subseq-alloca-2.i [2019-12-07 11:01:48,383 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 11:01:48,388 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2019-12-07 11:01:48,395 INFO L249 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2019-12-07 11:01:48,408 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 11:01:48,408 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 11:01:48,408 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 11:01:48,408 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 11:01:48,408 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 11:01:48,408 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 11:01:48,408 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 11:01:48,408 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 11:01:48,418 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-07 11:01:48,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 11:01:48,422 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:48,423 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 11:01:48,423 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:48,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:48,427 INFO L82 PathProgramCache]: Analyzing trace with hash 155459, now seen corresponding path program 1 times [2019-12-07 11:01:48,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:48,433 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774310829] [2019-12-07 11:01:48,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:48,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774310829] [2019-12-07 11:01:48,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:01:48,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 11:01:48,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569665011] [2019-12-07 11:01:48,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:01:48,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:48,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:01:48,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:01:48,558 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-07 11:01:48,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:48,592 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-12-07 11:01:48,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:01:48,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-12-07 11:01:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:48,600 INFO L225 Difference]: With dead ends: 33 [2019-12-07 11:01:48,600 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 11:01:48,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:01:48,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 11:01:48,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-07 11:01:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 11:01:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-12-07 11:01:48,622 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 3 [2019-12-07 11:01:48,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:48,622 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-12-07 11:01:48,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:01:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-12-07 11:01:48,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 11:01:48,623 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:48,623 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 11:01:48,623 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:48,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:48,623 INFO L82 PathProgramCache]: Analyzing trace with hash 155460, now seen corresponding path program 1 times [2019-12-07 11:01:48,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:48,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568772039] [2019-12-07 11:01:48,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:48,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568772039] [2019-12-07 11:01:48,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:01:48,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 11:01:48,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229097733] [2019-12-07 11:01:48,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 11:01:48,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:48,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 11:01:48,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:01:48,671 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 4 states. [2019-12-07 11:01:48,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:48,756 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2019-12-07 11:01:48,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:01:48,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-12-07 11:01:48,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:48,757 INFO L225 Difference]: With dead ends: 62 [2019-12-07 11:01:48,757 INFO L226 Difference]: Without dead ends: 62 [2019-12-07 11:01:48,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:01:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-07 11:01:48,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 34. [2019-12-07 11:01:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 11:01:48,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-12-07 11:01:48,763 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 3 [2019-12-07 11:01:48,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:48,763 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-12-07 11:01:48,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 11:01:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-12-07 11:01:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 11:01:48,764 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:48,764 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 11:01:48,764 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:48,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:48,765 INFO L82 PathProgramCache]: Analyzing trace with hash 4917366, now seen corresponding path program 1 times [2019-12-07 11:01:48,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:48,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532218231] [2019-12-07 11:01:48,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:48,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532218231] [2019-12-07 11:01:48,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:01:48,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 11:01:48,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103263595] [2019-12-07 11:01:48,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:01:48,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:48,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:01:48,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:01:48,804 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 3 states. [2019-12-07 11:01:48,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:48,827 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-12-07 11:01:48,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:01:48,828 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 11:01:48,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:48,828 INFO L225 Difference]: With dead ends: 33 [2019-12-07 11:01:48,828 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 11:01:48,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:01:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 11:01:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-12-07 11:01:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 11:01:48,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-12-07 11:01:48,832 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 4 [2019-12-07 11:01:48,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:48,832 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-12-07 11:01:48,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:01:48,832 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-12-07 11:01:48,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 11:01:48,833 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:48,833 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 11:01:48,833 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:48,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:48,833 INFO L82 PathProgramCache]: Analyzing trace with hash 4914907, now seen corresponding path program 1 times [2019-12-07 11:01:48,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:48,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473987787] [2019-12-07 11:01:48,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:48,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473987787] [2019-12-07 11:01:48,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:01:48,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 11:01:48,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747750322] [2019-12-07 11:01:48,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:01:48,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:48,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:01:48,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:01:48,857 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 3 states. [2019-12-07 11:01:48,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:48,878 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-12-07 11:01:48,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:01:48,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 11:01:48,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:48,879 INFO L225 Difference]: With dead ends: 31 [2019-12-07 11:01:48,879 INFO L226 Difference]: Without dead ends: 31 [2019-12-07 11:01:48,879 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:01:48,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-07 11:01:48,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-12-07 11:01:48,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 11:01:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-12-07 11:01:48,881 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 4 [2019-12-07 11:01:48,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:48,882 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-12-07 11:01:48,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:01:48,882 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-12-07 11:01:48,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 11:01:48,882 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:48,882 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 11:01:48,882 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:48,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:48,882 INFO L82 PathProgramCache]: Analyzing trace with hash 4914908, now seen corresponding path program 1 times [2019-12-07 11:01:48,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:48,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147798947] [2019-12-07 11:01:48,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:48,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:48,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147798947] [2019-12-07 11:01:48,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:01:48,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 11:01:48,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294089947] [2019-12-07 11:01:48,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 11:01:48,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:48,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 11:01:48,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:01:48,926 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 5 states. [2019-12-07 11:01:48,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:48,987 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2019-12-07 11:01:48,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 11:01:48,987 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2019-12-07 11:01:48,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:48,988 INFO L225 Difference]: With dead ends: 55 [2019-12-07 11:01:48,988 INFO L226 Difference]: Without dead ends: 55 [2019-12-07 11:01:48,988 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-07 11:01:48,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-07 11:01:48,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2019-12-07 11:01:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 11:01:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-12-07 11:01:48,992 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 4 [2019-12-07 11:01:48,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:48,992 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-12-07 11:01:48,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 11:01:48,992 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-12-07 11:01:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 11:01:48,992 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:48,992 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-12-07 11:01:48,992 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:48,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:48,993 INFO L82 PathProgramCache]: Analyzing trace with hash 149484289, now seen corresponding path program 1 times [2019-12-07 11:01:48,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:48,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063031003] [2019-12-07 11:01:48,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:49,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063031003] [2019-12-07 11:01:49,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135912920] [2019-12-07 11:01:49,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/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 [2019-12-07 11:01:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:49,072 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 11:01:49,075 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:01:49,101 INFO L430 ElimStorePlain]: Different costs {0=[|v_#length_46|], 1=[|ULTIMATE.start_main_old_#valid|]} [2019-12-07 11:01:49,108 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 11:01:49,115 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-12-07 11:01:49,115 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:01:49,123 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:01:49,128 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-12-07 11:01:49,129 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 11:01:49,135 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:01:49,136 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:01:49,136 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2019-12-07 11:01:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:49,154 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:01:49,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:01:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:49,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1835339038] [2019-12-07 11:01:49,210 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2019-12-07 11:01:49,210 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:01:49,214 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:01:49,218 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:01:49,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:01:49,415 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:01:49,422 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:01:49,577 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:01:49,848 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:01:49,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:01:49,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-12-07 11:01:49,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653375592] [2019-12-07 11:01:49,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 11:01:49,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:49,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 11:01:49,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-07 11:01:49,850 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 9 states. [2019-12-07 11:01:50,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:50,012 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2019-12-07 11:01:50,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 11:01:50,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2019-12-07 11:01:50,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:50,013 INFO L225 Difference]: With dead ends: 87 [2019-12-07 11:01:50,013 INFO L226 Difference]: Without dead ends: 87 [2019-12-07 11:01:50,013 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2019-12-07 11:01:50,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-07 11:01:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 30. [2019-12-07 11:01:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 11:01:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-12-07 11:01:50,016 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 5 [2019-12-07 11:01:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:50,016 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-12-07 11:01:50,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 11:01:50,016 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-12-07 11:01:50,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 11:01:50,017 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:50,017 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 11:01:50,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:01:50,218 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:50,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:50,218 INFO L82 PathProgramCache]: Analyzing trace with hash 152438340, now seen corresponding path program 1 times [2019-12-07 11:01:50,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:50,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27717417] [2019-12-07 11:01:50,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:50,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27717417] [2019-12-07 11:01:50,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:01:50,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 11:01:50,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924297629] [2019-12-07 11:01:50,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:01:50,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:50,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:01:50,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:01:50,314 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 3 states. [2019-12-07 11:01:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:50,363 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2019-12-07 11:01:50,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:01:50,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-07 11:01:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:50,365 INFO L225 Difference]: With dead ends: 29 [2019-12-07 11:01:50,365 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 11:01:50,366 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:01:50,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 11:01:50,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-12-07 11:01:50,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 11:01:50,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-12-07 11:01:50,370 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 5 [2019-12-07 11:01:50,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:50,371 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-12-07 11:01:50,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:01:50,371 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-12-07 11:01:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 11:01:50,372 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:50,372 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 11:01:50,372 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:50,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:50,373 INFO L82 PathProgramCache]: Analyzing trace with hash 430623137, now seen corresponding path program 1 times [2019-12-07 11:01:50,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:50,374 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974526167] [2019-12-07 11:01:50,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:50,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974526167] [2019-12-07 11:01:50,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:01:50,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 11:01:50,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115309351] [2019-12-07 11:01:50,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 11:01:50,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:50,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 11:01:50,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:01:50,440 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2019-12-07 11:01:50,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:50,508 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-12-07 11:01:50,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:01:50,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-12-07 11:01:50,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:50,509 INFO L225 Difference]: With dead ends: 46 [2019-12-07 11:01:50,509 INFO L226 Difference]: Without dead ends: 46 [2019-12-07 11:01:50,510 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-07 11:01:50,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-07 11:01:50,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2019-12-07 11:01:50,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 11:01:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2019-12-07 11:01:50,514 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 6 [2019-12-07 11:01:50,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:50,515 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2019-12-07 11:01:50,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 11:01:50,515 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2019-12-07 11:01:50,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 11:01:50,515 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:50,516 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 11:01:50,516 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:50,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:50,516 INFO L82 PathProgramCache]: Analyzing trace with hash 430623136, now seen corresponding path program 1 times [2019-12-07 11:01:50,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:50,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773658539] [2019-12-07 11:01:50,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:50,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773658539] [2019-12-07 11:01:50,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:01:50,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 11:01:50,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046636112] [2019-12-07 11:01:50,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 11:01:50,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:50,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 11:01:50,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:01:50,544 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 4 states. [2019-12-07 11:01:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:50,573 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-12-07 11:01:50,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:01:50,573 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-12-07 11:01:50,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:50,573 INFO L225 Difference]: With dead ends: 32 [2019-12-07 11:01:50,573 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 11:01:50,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:01:50,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 11:01:50,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-07 11:01:50,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 11:01:50,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-12-07 11:01:50,575 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 6 [2019-12-07 11:01:50,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:50,576 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-12-07 11:01:50,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 11:01:50,576 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-12-07 11:01:50,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 11:01:50,576 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:50,576 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-12-07 11:01:50,576 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:50,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:50,576 INFO L82 PathProgramCache]: Analyzing trace with hash 428332682, now seen corresponding path program 1 times [2019-12-07 11:01:50,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:50,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793330784] [2019-12-07 11:01:50,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:50,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793330784] [2019-12-07 11:01:50,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525368190] [2019-12-07 11:01:50,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/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 [2019-12-07 11:01:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:50,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 11:01:50,633 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:01:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:50,691 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:01:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:50,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [199880272] [2019-12-07 11:01:50,738 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-12-07 11:01:50,738 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:01:50,739 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:01:50,739 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:01:50,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:01:50,994 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:01:51,237 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2019-12-07 11:01:51,403 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:01:51,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:01:51,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2019-12-07 11:01:51,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218163871] [2019-12-07 11:01:51,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 11:01:51,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:51,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 11:01:51,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-12-07 11:01:51,404 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 13 states. [2019-12-07 11:01:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:51,557 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2019-12-07 11:01:51,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 11:01:51,557 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 6 [2019-12-07 11:01:51,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:51,558 INFO L225 Difference]: With dead ends: 80 [2019-12-07 11:01:51,558 INFO L226 Difference]: Without dead ends: 80 [2019-12-07 11:01:51,558 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2019-12-07 11:01:51,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-07 11:01:51,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 29. [2019-12-07 11:01:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 11:01:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2019-12-07 11:01:51,560 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 6 [2019-12-07 11:01:51,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:51,561 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2019-12-07 11:01:51,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 11:01:51,561 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2019-12-07 11:01:51,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 11:01:51,561 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:51,561 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:01:51,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:01:51,762 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:51,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:51,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1512028313, now seen corresponding path program 1 times [2019-12-07 11:01:51,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:51,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020290337] [2019-12-07 11:01:51,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:51,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020290337] [2019-12-07 11:01:51,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:01:51,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 11:01:51,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437834013] [2019-12-07 11:01:51,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:01:51,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:51,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:01:51,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:01:51,805 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 3 states. [2019-12-07 11:01:51,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:51,824 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2019-12-07 11:01:51,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:01:51,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-12-07 11:01:51,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:51,825 INFO L225 Difference]: With dead ends: 26 [2019-12-07 11:01:51,825 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 11:01:51,825 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 [2019-12-07 11:01:51,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 11:01:51,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 11:01:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 11:01:51,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-12-07 11:01:51,827 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 8 [2019-12-07 11:01:51,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:51,827 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-12-07 11:01:51,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:01:51,827 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-12-07 11:01:51,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 11:01:51,827 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:51,827 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:01:51,828 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:51,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:51,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1512028314, now seen corresponding path program 1 times [2019-12-07 11:01:51,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:51,828 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607774132] [2019-12-07 11:01:51,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:51,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607774132] [2019-12-07 11:01:51,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:01:51,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 11:01:51,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43314167] [2019-12-07 11:01:51,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 11:01:51,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:51,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 11:01:51,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:01:51,860 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2019-12-07 11:01:51,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:51,894 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2019-12-07 11:01:51,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:01:51,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-12-07 11:01:51,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:51,895 INFO L225 Difference]: With dead ends: 31 [2019-12-07 11:01:51,895 INFO L226 Difference]: Without dead ends: 31 [2019-12-07 11:01:51,895 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:01:51,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-07 11:01:51,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-12-07 11:01:51,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 11:01:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-12-07 11:01:51,897 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 8 [2019-12-07 11:01:51,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:51,898 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-12-07 11:01:51,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 11:01:51,898 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-12-07 11:01:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 11:01:51,898 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:51,898 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:01:51,899 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:51,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:51,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1360453224, now seen corresponding path program 1 times [2019-12-07 11:01:51,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:51,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761412652] [2019-12-07 11:01:51,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:51,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761412652] [2019-12-07 11:01:51,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:01:51,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 11:01:51,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713119280] [2019-12-07 11:01:51,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 11:01:51,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:51,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 11:01:51,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:01:51,977 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2019-12-07 11:01:51,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:51,995 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2019-12-07 11:01:51,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:01:51,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-12-07 11:01:51,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:51,996 INFO L225 Difference]: With dead ends: 29 [2019-12-07 11:01:51,996 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 11:01:51,996 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:01:51,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 11:01:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-12-07 11:01:51,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 11:01:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-12-07 11:01:51,998 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 10 [2019-12-07 11:01:51,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:51,999 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-12-07 11:01:51,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 11:01:51,999 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-12-07 11:01:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 11:01:51,999 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:51,999 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:01:51,999 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:52,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:52,000 INFO L82 PathProgramCache]: Analyzing trace with hash -775606801, now seen corresponding path program 1 times [2019-12-07 11:01:52,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:52,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363845704] [2019-12-07 11:01:52,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:52,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363845704] [2019-12-07 11:01:52,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:01:52,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 11:01:52,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267347925] [2019-12-07 11:01:52,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:01:52,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:52,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:01:52,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:01:52,014 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-12-07 11:01:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:52,020 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-12-07 11:01:52,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:01:52,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-12-07 11:01:52,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:52,021 INFO L225 Difference]: With dead ends: 25 [2019-12-07 11:01:52,021 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 11:01:52,021 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:01:52,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 11:01:52,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-12-07 11:01:52,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 11:01:52,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-12-07 11:01:52,023 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 11 [2019-12-07 11:01:52,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:52,023 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-12-07 11:01:52,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:01:52,023 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-12-07 11:01:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 11:01:52,023 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:52,023 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:01:52,023 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:52,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:52,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1584616672, now seen corresponding path program 1 times [2019-12-07 11:01:52,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:52,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386730418] [2019-12-07 11:01:52,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:52,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386730418] [2019-12-07 11:01:52,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:01:52,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 11:01:52,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773012104] [2019-12-07 11:01:52,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 11:01:52,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:52,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 11:01:52,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-07 11:01:52,108 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2019-12-07 11:01:52,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:52,263 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2019-12-07 11:01:52,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 11:01:52,263 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-12-07 11:01:52,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:52,264 INFO L225 Difference]: With dead ends: 32 [2019-12-07 11:01:52,264 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 11:01:52,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-12-07 11:01:52,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 11:01:52,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-12-07 11:01:52,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-07 11:01:52,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-12-07 11:01:52,266 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2019-12-07 11:01:52,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:52,266 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-12-07 11:01:52,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 11:01:52,266 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-12-07 11:01:52,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 11:01:52,266 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:52,266 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:01:52,267 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:52,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:52,267 INFO L82 PathProgramCache]: Analyzing trace with hash 2121967043, now seen corresponding path program 1 times [2019-12-07 11:01:52,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:52,267 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591160266] [2019-12-07 11:01:52,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:52,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591160266] [2019-12-07 11:01:52,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845882955] [2019-12-07 11:01:52,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/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 [2019-12-07 11:01:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:52,356 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 11:01:52,357 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:01:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:52,431 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:01:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:01:52,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1705141468] [2019-12-07 11:01:52,515 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-12-07 11:01:52,515 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:01:52,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:01:52,515 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:01:52,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:01:52,649 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:01:52,788 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:01:53,457 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:01:53,726 WARN L192 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 96 [2019-12-07 11:01:53,965 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 92 [2019-12-07 11:01:54,275 WARN L192 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 97 [2019-12-07 11:01:54,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:01:54,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 6, 6] total 26 [2019-12-07 11:01:54,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215632264] [2019-12-07 11:01:54,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 11:01:54,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:54,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 11:01:54,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2019-12-07 11:01:54,281 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2019-12-07 11:01:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:54,335 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-12-07 11:01:54,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 11:01:54,336 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-07 11:01:54,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:54,336 INFO L225 Difference]: With dead ends: 33 [2019-12-07 11:01:54,336 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 11:01:54,337 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2019-12-07 11:01:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 11:01:54,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-12-07 11:01:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 11:01:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-12-07 11:01:54,338 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2019-12-07 11:01:54,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:54,338 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-12-07 11:01:54,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 11:01:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-12-07 11:01:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 11:01:54,339 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:54,339 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:01:54,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:01:54,540 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:54,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash -152878415, now seen corresponding path program 1 times [2019-12-07 11:01:54,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:54,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674718261] [2019-12-07 11:01:54,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:01:54,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674718261] [2019-12-07 11:01:54,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364399840] [2019-12-07 11:01:54,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/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 [2019-12-07 11:01:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:54,642 INFO L264 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 11:01:54,643 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:01:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:01:54,721 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:01:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:01:54,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1605546353] [2019-12-07 11:01:54,792 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:01:54,792 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:01:54,792 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:01:54,792 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:01:54,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:01:54,902 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:01:55,266 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:01:55,420 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2019-12-07 11:01:56,058 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:01:56,259 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:01:56,476 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:01:56,721 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:01:56,990 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:01:56,991 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:01:56,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:01:56,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2019-12-07 11:01:56,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557774183] [2019-12-07 11:01:56,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 11:01:56,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:56,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 11:01:56,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2019-12-07 11:01:56,992 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 17 states. [2019-12-07 11:01:57,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:57,195 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-12-07 11:01:57,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 11:01:57,196 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2019-12-07 11:01:57,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:57,196 INFO L225 Difference]: With dead ends: 36 [2019-12-07 11:01:57,196 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 11:01:57,197 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 11:01:57,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 11:01:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2019-12-07 11:01:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 11:01:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-12-07 11:01:57,199 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2019-12-07 11:01:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:57,199 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-12-07 11:01:57,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 11:01:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-12-07 11:01:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 11:01:57,199 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:01:57,200 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:01:57,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:01:57,401 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:01:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:01:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash -887214678, now seen corresponding path program 1 times [2019-12-07 11:01:57,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:01:57,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102532801] [2019-12-07 11:01:57,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:01:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:01:57,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102532801] [2019-12-07 11:01:57,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725993853] [2019-12-07 11:01:57,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/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 [2019-12-07 11:01:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:01:57,501 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 11:01:57,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:01:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:01:57,520 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:01:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:01:57,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [269455249] [2019-12-07 11:01:57,580 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:01:57,580 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:01:57,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:01:57,581 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:01:57,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:01:57,828 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:01:57,870 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:01:58,093 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:01:58,290 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:01:58,942 WARN L192 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2019-12-07 11:01:59,142 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2019-12-07 11:01:59,402 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-12-07 11:01:59,606 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2019-12-07 11:01:59,877 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:02:00,076 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:02:00,539 WARN L192 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:02:01,117 WARN L192 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:02:01,388 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:02:01,699 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:02:01,699 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:02:01,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:02:01,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2019-12-07 11:02:01,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910104215] [2019-12-07 11:02:01,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 11:02:01,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:02:01,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 11:02:01,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2019-12-07 11:02:01,701 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 13 states. [2019-12-07 11:02:02,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:02:02,352 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-12-07 11:02:02,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 11:02:02,352 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-07 11:02:02,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:02:02,353 INFO L225 Difference]: With dead ends: 34 [2019-12-07 11:02:02,353 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 11:02:02,353 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2019-12-07 11:02:02,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 11:02:02,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-12-07 11:02:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 11:02:02,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-12-07 11:02:02,355 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 18 [2019-12-07 11:02:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:02:02,355 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-12-07 11:02:02,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 11:02:02,355 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-12-07 11:02:02,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 11:02:02,356 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:02:02,356 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:02:02,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:02:02,557 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:02:02,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:02:02,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1844395536, now seen corresponding path program 2 times [2019-12-07 11:02:02,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:02:02,559 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718141206] [2019-12-07 11:02:02,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:02:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:02:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:02:02,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718141206] [2019-12-07 11:02:02,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269145960] [2019-12-07 11:02:02,799 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/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 [2019-12-07 11:02:02,847 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 11:02:02,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:02:02,848 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-07 11:02:02,849 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:02:05,029 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 37 [2019-12-07 11:02:05,340 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2019-12-07 11:02:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 11:02:05,373 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:02:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 11:02:05,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [550614078] [2019-12-07 11:02:05,828 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:02:05,828 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:02:05,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:02:05,828 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:02:05,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:02:06,248 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:02:06,421 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2019-12-07 11:02:07,252 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:02:07,528 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:02:07,807 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:02:08,251 WARN L192 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:02:08,780 WARN L192 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:02:08,781 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:02:08,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:02:08,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 24 [2019-12-07 11:02:08,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682074014] [2019-12-07 11:02:08,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 11:02:08,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:02:08,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 11:02:08,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 11:02:08,784 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 26 states. [2019-12-07 11:02:09,622 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2019-12-07 11:02:13,798 WARN L192 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-12-07 11:02:18,120 WARN L192 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-12-07 11:02:22,763 WARN L192 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2019-12-07 11:02:27,446 WARN L192 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2019-12-07 11:02:27,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:02:27,743 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2019-12-07 11:02:27,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-07 11:02:27,743 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 22 [2019-12-07 11:02:27,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:02:27,744 INFO L225 Difference]: With dead ends: 58 [2019-12-07 11:02:27,744 INFO L226 Difference]: Without dead ends: 58 [2019-12-07 11:02:27,745 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=861, Invalid=3561, Unknown=0, NotChecked=0, Total=4422 [2019-12-07 11:02:27,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-07 11:02:27,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 28. [2019-12-07 11:02:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 11:02:27,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-12-07 11:02:27,746 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2019-12-07 11:02:27,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:02:27,746 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-12-07 11:02:27,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 11:02:27,747 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-12-07 11:02:27,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 11:02:27,747 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:02:27,747 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:02:27,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:02:27,948 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:02:27,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:02:27,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1357437225, now seen corresponding path program 2 times [2019-12-07 11:02:27,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:02:27,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976521243] [2019-12-07 11:02:27,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:02:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:02:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:02:28,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976521243] [2019-12-07 11:02:28,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405848011] [2019-12-07 11:02:28,159 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:02:28,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 11:02:28,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:02:28,201 INFO L264 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 11:02:28,202 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:02:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:02:28,284 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:02:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:02:28,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1126921401] [2019-12-07 11:02:28,369 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:02:28,370 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:02:28,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:02:28,370 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:02:28,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:02:28,746 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:02:28,974 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:02:29,424 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2019-12-07 11:02:29,764 WARN L192 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-12-07 11:02:30,148 WARN L192 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2019-12-07 11:02:30,527 WARN L192 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:02:30,964 WARN L192 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:02:31,578 WARN L192 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:02:31,834 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:02:32,155 WARN L192 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:02:32,557 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:02:32,558 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:02:32,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:02:32,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2019-12-07 11:02:32,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911162847] [2019-12-07 11:02:32,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 11:02:32,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:02:32,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 11:02:32,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 11:02:32,560 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 21 states. [2019-12-07 11:02:33,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:02:33,128 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2019-12-07 11:02:33,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 11:02:33,128 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2019-12-07 11:02:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:02:33,128 INFO L225 Difference]: With dead ends: 43 [2019-12-07 11:02:33,128 INFO L226 Difference]: Without dead ends: 31 [2019-12-07 11:02:33,129 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=198, Invalid=1442, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 11:02:33,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-07 11:02:33,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-12-07 11:02:33,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 11:02:33,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-12-07 11:02:33,131 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2019-12-07 11:02:33,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:02:33,131 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-12-07 11:02:33,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 11:02:33,131 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-12-07 11:02:33,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-07 11:02:33,132 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:02:33,132 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:02:33,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:02:33,333 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:02:33,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:02:33,334 INFO L82 PathProgramCache]: Analyzing trace with hash 819766423, now seen corresponding path program 3 times [2019-12-07 11:02:33,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:02:33,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679410284] [2019-12-07 11:02:33,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:02:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:02:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:02:33,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679410284] [2019-12-07 11:02:33,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599789876] [2019-12-07 11:02:33,437 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:02:33,481 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:02:33,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:02:33,482 INFO L264 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-07 11:02:33,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:02:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:02:33,585 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:02:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:02:33,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263012607] [2019-12-07 11:02:33,704 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:02:33,704 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:02:33,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:02:33,704 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:02:33,704 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:02:34,072 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:02:34,286 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:02:35,120 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:02:35,564 WARN L192 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:02:35,973 WARN L192 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:02:36,238 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:02:36,580 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:02:36,581 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:02:36,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:02:36,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2019-12-07 11:02:36,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077807938] [2019-12-07 11:02:36,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 11:02:36,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:02:36,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 11:02:36,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 11:02:36,582 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 24 states. [2019-12-07 11:02:37,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:02:37,136 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-12-07 11:02:37,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 11:02:37,136 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2019-12-07 11:02:37,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:02:37,137 INFO L225 Difference]: With dead ends: 41 [2019-12-07 11:02:37,137 INFO L226 Difference]: Without dead ends: 39 [2019-12-07 11:02:37,137 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2019-12-07 11:02:37,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-07 11:02:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2019-12-07 11:02:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 11:02:37,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-12-07 11:02:37,138 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 26 [2019-12-07 11:02:37,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:02:37,139 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-12-07 11:02:37,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 11:02:37,139 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-12-07 11:02:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-07 11:02:37,139 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:02:37,139 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:02:37,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:02:37,340 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:02:37,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:02:37,340 INFO L82 PathProgramCache]: Analyzing trace with hash 144419414, now seen corresponding path program 4 times [2019-12-07 11:02:37,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:02:37,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92866701] [2019-12-07 11:02:37,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:02:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:02:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:02:37,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92866701] [2019-12-07 11:02:37,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671491985] [2019-12-07 11:02:37,762 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:02:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:02:37,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-07 11:02:37,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:02:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:02:38,109 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:02:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:02:38,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1696954702] [2019-12-07 11:02:38,383 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:02:38,383 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:02:38,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:02:38,383 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:02:38,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:02:38,450 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:02:38,749 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:02:39,008 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:02:39,291 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2019-12-07 11:02:39,737 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-12-07 11:02:39,970 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2019-12-07 11:02:40,249 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:02:40,732 WARN L192 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:02:41,386 WARN L192 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:02:41,943 WARN L192 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:02:42,491 WARN L192 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:02:42,964 WARN L192 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:02:42,967 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:02:42,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:02:42,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 33 [2019-12-07 11:02:42,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27749781] [2019-12-07 11:02:42,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-07 11:02:42,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:02:42,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-07 11:02:42,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1809, Unknown=0, NotChecked=0, Total=1980 [2019-12-07 11:02:42,970 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 33 states. [2019-12-07 11:02:43,692 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2019-12-07 11:02:44,074 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2019-12-07 11:02:44,422 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2019-12-07 11:02:44,743 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2019-12-07 11:02:45,649 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2019-12-07 11:02:47,307 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2019-12-07 11:02:48,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:02:48,355 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2019-12-07 11:02:48,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-07 11:02:48,356 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2019-12-07 11:02:48,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:02:48,356 INFO L225 Difference]: With dead ends: 114 [2019-12-07 11:02:48,356 INFO L226 Difference]: Without dead ends: 92 [2019-12-07 11:02:48,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=665, Invalid=5341, Unknown=0, NotChecked=0, Total=6006 [2019-12-07 11:02:48,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-07 11:02:48,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 46. [2019-12-07 11:02:48,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-07 11:02:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2019-12-07 11:02:48,359 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 32 [2019-12-07 11:02:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:02:48,360 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2019-12-07 11:02:48,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-07 11:02:48,360 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2019-12-07 11:02:48,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-07 11:02:48,360 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:02:48,360 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 11:02:48,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:02:48,562 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:02:48,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:02:48,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1989259272, now seen corresponding path program 5 times [2019-12-07 11:02:48,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:02:48,563 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132808527] [2019-12-07 11:02:48,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:02:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:02:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 39 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 11:02:48,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132808527] [2019-12-07 11:02:48,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314409738] [2019-12-07 11:02:48,659 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:02:48,725 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 11:02:48,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:02:48,726 INFO L264 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 11:02:48,728 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:02:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 11:02:48,850 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:02:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 11:02:48,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1143985368] [2019-12-07 11:02:48,937 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:02:48,937 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:02:48,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:02:48,937 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:02:48,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:02:49,006 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:02:49,291 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:02:49,502 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:02:49,952 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-12-07 11:02:50,210 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2019-12-07 11:02:50,661 WARN L192 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:02:51,344 WARN L192 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:02:51,874 WARN L192 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:02:52,181 WARN L192 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:02:52,862 WARN L192 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:02:53,441 WARN L192 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:02:53,444 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:02:53,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:02:53,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2019-12-07 11:02:53,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699209264] [2019-12-07 11:02:53,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 11:02:53,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:02:53,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 11:02:53,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 11:02:53,448 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 26 states. [2019-12-07 11:02:54,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:02:54,296 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2019-12-07 11:02:54,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 11:02:54,297 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 40 [2019-12-07 11:02:54,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:02:54,297 INFO L225 Difference]: With dead ends: 75 [2019-12-07 11:02:54,297 INFO L226 Difference]: Without dead ends: 52 [2019-12-07 11:02:54,298 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=305, Invalid=1675, Unknown=0, NotChecked=0, Total=1980 [2019-12-07 11:02:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-07 11:02:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2019-12-07 11:02:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 11:02:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-12-07 11:02:54,300 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 40 [2019-12-07 11:02:54,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:02:54,301 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-12-07 11:02:54,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 11:02:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-12-07 11:02:54,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-07 11:02:54,302 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:02:54,302 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:02:54,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:02:54,503 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:02:54,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:02:54,504 INFO L82 PathProgramCache]: Analyzing trace with hash -532326461, now seen corresponding path program 6 times [2019-12-07 11:02:54,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:02:54,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867505506] [2019-12-07 11:02:54,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:02:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:02:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:02:54,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867505506] [2019-12-07 11:02:54,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193883849] [2019-12-07 11:02:54,691 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:02:54,738 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:02:54,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:02:54,740 INFO L264 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-07 11:02:54,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:02:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:02:54,932 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:02:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:02:55,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1028151855] [2019-12-07 11:02:55,114 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:02:55,114 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:02:55,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:02:55,115 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:02:55,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:02:55,210 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:02:55,230 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:02:55,532 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:02:55,782 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:02:55,968 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2019-12-07 11:02:56,783 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:02:57,338 WARN L192 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:02:57,806 WARN L192 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:02:58,092 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:02:58,513 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:02:58,515 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:02:58,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:02:58,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2019-12-07 11:02:58,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719287667] [2019-12-07 11:02:58,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-07 11:02:58,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:02:58,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-07 11:02:58,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1664, Unknown=0, NotChecked=0, Total=1806 [2019-12-07 11:02:58,517 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 31 states. [2019-12-07 11:02:59,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:02:59,954 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2019-12-07 11:02:59,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 11:02:59,954 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 40 [2019-12-07 11:02:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:02:59,955 INFO L225 Difference]: With dead ends: 71 [2019-12-07 11:02:59,955 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 11:02:59,956 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=286, Invalid=2906, Unknown=0, NotChecked=0, Total=3192 [2019-12-07 11:02:59,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 11:02:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-12-07 11:02:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-07 11:02:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-12-07 11:02:59,957 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 40 [2019-12-07 11:02:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:02:59,957 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-12-07 11:02:59,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-07 11:02:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-12-07 11:02:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-07 11:02:59,958 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:02:59,958 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:03:00,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:00,159 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:03:00,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:03:00,160 INFO L82 PathProgramCache]: Analyzing trace with hash -700414159, now seen corresponding path program 7 times [2019-12-07 11:03:00,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:03:00,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30264418] [2019-12-07 11:03:00,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:03:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:03:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:00,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30264418] [2019-12-07 11:03:00,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58174542] [2019-12-07 11:03:00,294 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:03:00,335 INFO L264 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-07 11:03:00,337 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:03:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:00,391 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:03:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:00,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [706102782] [2019-12-07 11:03:00,541 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:03:00,542 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:03:00,542 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:03:00,542 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:03:00,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:03:00,797 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:03:00,811 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:03:01,018 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:03:01,235 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:03:01,608 WARN L192 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2019-12-07 11:03:02,720 WARN L192 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:03:03,170 WARN L192 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:03:03,491 WARN L192 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:03:03,942 WARN L192 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:03:04,479 WARN L192 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:03:04,481 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:03:04,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:03:04,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 23 [2019-12-07 11:03:04,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329135281] [2019-12-07 11:03:04,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 11:03:04,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:03:04,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 11:03:04,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 11:03:04,483 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 24 states. [2019-12-07 11:03:05,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:03:05,929 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2019-12-07 11:03:05,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 11:03:05,930 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 42 [2019-12-07 11:03:05,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:03:05,930 INFO L225 Difference]: With dead ends: 57 [2019-12-07 11:03:05,930 INFO L226 Difference]: Without dead ends: 55 [2019-12-07 11:03:05,931 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=328, Invalid=1928, Unknown=0, NotChecked=0, Total=2256 [2019-12-07 11:03:05,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-07 11:03:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2019-12-07 11:03:05,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 11:03:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-12-07 11:03:05,933 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 42 [2019-12-07 11:03:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:03:05,933 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-12-07 11:03:05,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 11:03:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-12-07 11:03:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-07 11:03:05,934 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:03:05,934 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:03:06,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:06,135 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:03:06,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:03:06,136 INFO L82 PathProgramCache]: Analyzing trace with hash -359812752, now seen corresponding path program 8 times [2019-12-07 11:03:06,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:03:06,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602976228] [2019-12-07 11:03:06,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:03:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:03:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:06,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602976228] [2019-12-07 11:03:06,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042757376] [2019-12-07 11:03:06,283 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:06,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 11:03:06,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:03:06,358 INFO L264 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 46 conjunts are in the unsatisfiable core [2019-12-07 11:03:06,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:03:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:06,414 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:03:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:06,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1768167568] [2019-12-07 11:03:06,479 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:03:06,479 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:03:06,479 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:03:06,479 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:03:06,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:03:06,571 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:03:06,859 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:03:07,080 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:03:07,593 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-12-07 11:03:07,849 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2019-12-07 11:03:08,192 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:03:08,417 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:03:08,661 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:03:09,124 WARN L192 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:03:09,494 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:03:09,495 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:03:09,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:03:09,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 20 [2019-12-07 11:03:09,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701498906] [2019-12-07 11:03:09,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 11:03:09,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:03:09,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 11:03:09,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2019-12-07 11:03:09,496 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 20 states. [2019-12-07 11:03:10,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:03:10,691 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2019-12-07 11:03:10,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 11:03:10,693 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-07 11:03:10,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:03:10,694 INFO L225 Difference]: With dead ends: 85 [2019-12-07 11:03:10,694 INFO L226 Difference]: Without dead ends: 55 [2019-12-07 11:03:10,697 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=255, Invalid=2097, Unknown=0, NotChecked=0, Total=2352 [2019-12-07 11:03:10,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-07 11:03:10,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-12-07 11:03:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-07 11:03:10,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-12-07 11:03:10,701 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2019-12-07 11:03:10,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:03:10,702 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-12-07 11:03:10,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 11:03:10,702 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-12-07 11:03:10,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-07 11:03:10,703 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:03:10,704 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:03:10,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:10,905 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:03:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:03:10,906 INFO L82 PathProgramCache]: Analyzing trace with hash -78540066, now seen corresponding path program 9 times [2019-12-07 11:03:10,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:03:10,907 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172183676] [2019-12-07 11:03:10,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:03:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:03:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 9 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:11,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172183676] [2019-12-07 11:03:11,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631915728] [2019-12-07 11:03:11,084 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:11,137 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:03:11,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:03:11,138 INFO L264 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-07 11:03:11,139 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:03:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:11,378 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:03:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:11,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1511362548] [2019-12-07 11:03:11,685 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:03:11,685 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:03:11,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:03:11,686 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:03:11,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:03:11,756 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:03:12,041 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:03:12,284 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:03:13,144 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:03:13,402 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:03:13,645 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:03:13,936 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:03:14,340 WARN L192 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:03:14,343 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:03:14,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:03:14,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 40 [2019-12-07 11:03:14,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040460142] [2019-12-07 11:03:14,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-07 11:03:14,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:03:14,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-07 11:03:14,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2562, Unknown=0, NotChecked=0, Total=2862 [2019-12-07 11:03:14,345 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 42 states. [2019-12-07 11:03:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:03:15,859 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2019-12-07 11:03:15,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 11:03:15,860 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2019-12-07 11:03:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:03:15,861 INFO L225 Difference]: With dead ends: 65 [2019-12-07 11:03:15,861 INFO L226 Difference]: Without dead ends: 63 [2019-12-07 11:03:15,864 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=544, Invalid=3362, Unknown=0, NotChecked=0, Total=3906 [2019-12-07 11:03:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-07 11:03:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2019-12-07 11:03:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-07 11:03:15,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-12-07 11:03:15,868 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 50 [2019-12-07 11:03:15,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:03:15,868 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-12-07 11:03:15,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-07 11:03:15,869 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-12-07 11:03:15,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-12-07 11:03:15,870 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:03:15,870 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:03:16,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:16,071 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:03:16,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:03:16,072 INFO L82 PathProgramCache]: Analyzing trace with hash -486504611, now seen corresponding path program 10 times [2019-12-07 11:03:16,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:03:16,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433646146] [2019-12-07 11:03:16,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:03:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:03:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:16,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433646146] [2019-12-07 11:03:16,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764536851] [2019-12-07 11:03:16,259 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:03:16,326 INFO L264 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 49 conjunts are in the unsatisfiable core [2019-12-07 11:03:16,328 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:03:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:16,851 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:03:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:17,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1516935901] [2019-12-07 11:03:17,865 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:03:17,865 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:03:17,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:03:17,866 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:03:17,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:03:18,021 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:03:18,029 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:03:18,358 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:03:18,622 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:03:19,596 WARN L192 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-12-07 11:03:20,133 WARN L192 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2019-12-07 11:03:20,516 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:03:20,718 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:03:20,988 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:03:21,254 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:03:21,567 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:03:21,961 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:03:21,963 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:03:21,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:03:21,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2019-12-07 11:03:21,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120373605] [2019-12-07 11:03:21,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-07 11:03:21,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:03:21,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-07 11:03:21,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2829, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 11:03:21,965 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 44 states. [2019-12-07 11:03:24,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:03:24,242 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2019-12-07 11:03:24,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-07 11:03:24,242 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 56 [2019-12-07 11:03:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:03:24,243 INFO L225 Difference]: With dead ends: 110 [2019-12-07 11:03:24,243 INFO L226 Difference]: Without dead ends: 72 [2019-12-07 11:03:24,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=739, Invalid=6401, Unknown=0, NotChecked=0, Total=7140 [2019-12-07 11:03:24,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-07 11:03:24,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2019-12-07 11:03:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-07 11:03:24,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2019-12-07 11:03:24,246 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 56 [2019-12-07 11:03:24,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:03:24,246 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2019-12-07 11:03:24,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-07 11:03:24,246 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2019-12-07 11:03:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-12-07 11:03:24,246 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:03:24,247 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:03:24,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:24,447 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:03:24,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:03:24,448 INFO L82 PathProgramCache]: Analyzing trace with hash -217208438, now seen corresponding path program 11 times [2019-12-07 11:03:24,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:03:24,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872111014] [2019-12-07 11:03:24,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:03:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:03:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 33 proven. 150 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:24,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872111014] [2019-12-07 11:03:24,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359754036] [2019-12-07 11:03:24,681 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:24,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-12-07 11:03:24,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:03:24,792 INFO L264 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 58 conjunts are in the unsatisfiable core [2019-12-07 11:03:24,793 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:03:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 33 proven. 150 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:24,861 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:03:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 33 proven. 150 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:24,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [191750682] [2019-12-07 11:03:24,941 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:03:24,941 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:03:24,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:03:24,941 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:03:24,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:03:25,037 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:03:25,328 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:03:25,570 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:03:26,384 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:03:26,615 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:03:26,837 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:03:27,103 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:03:27,429 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:03:27,431 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:03:27,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:03:27,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 24 [2019-12-07 11:03:27,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457824324] [2019-12-07 11:03:27,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 11:03:27,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:03:27,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 11:03:27,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 11:03:27,432 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 24 states. [2019-12-07 11:03:28,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:03:28,145 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2019-12-07 11:03:28,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-07 11:03:28,146 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 64 [2019-12-07 11:03:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:03:28,146 INFO L225 Difference]: With dead ends: 113 [2019-12-07 11:03:28,146 INFO L226 Difference]: Without dead ends: 71 [2019-12-07 11:03:28,147 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 169 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=307, Invalid=3115, Unknown=0, NotChecked=0, Total=3422 [2019-12-07 11:03:28,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-07 11:03:28,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-12-07 11:03:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-07 11:03:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2019-12-07 11:03:28,148 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 64 [2019-12-07 11:03:28,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:03:28,149 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2019-12-07 11:03:28,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 11:03:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2019-12-07 11:03:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-12-07 11:03:28,149 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:03:28,149 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:03:28,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:28,350 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:03:28,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:03:28,351 INFO L82 PathProgramCache]: Analyzing trace with hash 317517560, now seen corresponding path program 12 times [2019-12-07 11:03:28,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:03:28,351 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121901011] [2019-12-07 11:03:28,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:03:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:03:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:28,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121901011] [2019-12-07 11:03:28,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128438803] [2019-12-07 11:03:28,570 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:28,647 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:03:28,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:03:28,649 INFO L264 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 52 conjunts are in the unsatisfiable core [2019-12-07 11:03:28,650 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:03:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 36 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:29,023 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:03:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 49 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:29,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2048083907] [2019-12-07 11:03:29,509 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:03:29,509 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:03:29,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:03:29,509 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:03:29,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:03:29,620 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:03:29,926 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:03:30,200 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:03:30,624 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2019-12-07 11:03:31,007 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-12-07 11:03:31,716 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:03:32,191 WARN L192 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:03:32,655 WARN L192 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:03:33,265 WARN L192 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:03:34,153 WARN L192 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:03:34,160 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:03:34,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:03:34,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 52 [2019-12-07 11:03:34,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469485022] [2019-12-07 11:03:34,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-12-07 11:03:34,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:03:34,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-12-07 11:03:34,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=3852, Unknown=0, NotChecked=0, Total=4290 [2019-12-07 11:03:34,168 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 54 states. [2019-12-07 11:03:36,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:03:36,319 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2019-12-07 11:03:36,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 11:03:36,320 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 66 [2019-12-07 11:03:36,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:03:36,321 INFO L225 Difference]: With dead ends: 81 [2019-12-07 11:03:36,321 INFO L226 Difference]: Without dead ends: 79 [2019-12-07 11:03:36,323 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=813, Invalid=5039, Unknown=0, NotChecked=0, Total=5852 [2019-12-07 11:03:36,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-07 11:03:36,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2019-12-07 11:03:36,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-07 11:03:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2019-12-07 11:03:36,327 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 66 [2019-12-07 11:03:36,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:03:36,328 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2019-12-07 11:03:36,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-12-07 11:03:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2019-12-07 11:03:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-12-07 11:03:36,329 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:03:36,329 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:03:36,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:36,531 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:03:36,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:03:36,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1224153097, now seen corresponding path program 13 times [2019-12-07 11:03:36,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:03:36,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432892401] [2019-12-07 11:03:36,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:03:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:03:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 38 proven. 203 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:36,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432892401] [2019-12-07 11:03:36,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153389991] [2019-12-07 11:03:36,784 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:03:36,846 INFO L264 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 64 conjunts are in the unsatisfiable core [2019-12-07 11:03:36,847 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:03:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 38 proven. 203 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:37,863 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:03:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 38 proven. 203 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:38,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1547936968] [2019-12-07 11:03:38,658 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:03:38,658 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:03:38,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:03:38,658 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:03:38,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:03:38,757 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:03:39,067 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:03:39,335 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:03:40,460 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:03:40,890 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:03:41,261 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:03:41,537 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:03:41,872 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:03:42,254 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:03:42,256 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:03:42,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:03:42,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 50 [2019-12-07 11:03:42,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995261362] [2019-12-07 11:03:42,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-12-07 11:03:42,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:03:42,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-12-07 11:03:42,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=3679, Unknown=0, NotChecked=0, Total=3906 [2019-12-07 11:03:42,257 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 51 states. [2019-12-07 11:03:44,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:03:44,723 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2019-12-07 11:03:44,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-07 11:03:44,723 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 72 [2019-12-07 11:03:44,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:03:44,724 INFO L225 Difference]: With dead ends: 127 [2019-12-07 11:03:44,724 INFO L226 Difference]: Without dead ends: 79 [2019-12-07 11:03:44,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=445, Invalid=6197, Unknown=0, NotChecked=0, Total=6642 [2019-12-07 11:03:44,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-07 11:03:44,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2019-12-07 11:03:44,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-12-07 11:03:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2019-12-07 11:03:44,727 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 72 [2019-12-07 11:03:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:03:44,727 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2019-12-07 11:03:44,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-12-07 11:03:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2019-12-07 11:03:44,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-12-07 11:03:44,728 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:03:44,728 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:03:44,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:44,929 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:03:44,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:03:44,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1355096219, now seen corresponding path program 14 times [2019-12-07 11:03:44,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:03:44,931 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796780845] [2019-12-07 11:03:44,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:03:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:03:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 36 proven. 220 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:45,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796780845] [2019-12-07 11:03:45,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903527283] [2019-12-07 11:03:45,187 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:45,305 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-07 11:03:45,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:03:45,307 INFO L264 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 50 conjunts are in the unsatisfiable core [2019-12-07 11:03:45,308 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:03:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 49 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:45,754 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:03:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 64 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:46,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263372618] [2019-12-07 11:03:46,383 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:03:46,383 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:03:46,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:03:46,384 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:03:46,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:03:46,472 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:03:46,785 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:03:47,069 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:03:47,472 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2019-12-07 11:03:47,826 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2019-12-07 11:03:48,244 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-12-07 11:03:48,637 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2019-12-07 11:03:49,158 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:03:49,436 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:03:49,808 WARN L192 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:03:50,332 WARN L192 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:03:50,924 WARN L192 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:03:50,927 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:03:50,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:03:50,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 58 [2019-12-07 11:03:50,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463879507] [2019-12-07 11:03:50,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-12-07 11:03:50,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:03:50,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-12-07 11:03:50,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=4541, Unknown=0, NotChecked=0, Total=5112 [2019-12-07 11:03:50,929 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 60 states. [2019-12-07 11:03:52,103 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-07 11:03:52,333 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2019-12-07 11:03:52,634 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2019-12-07 11:03:52,927 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2019-12-07 11:03:53,217 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2019-12-07 11:03:53,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:03:53,580 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2019-12-07 11:03:53,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-07 11:03:53,580 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 74 [2019-12-07 11:03:53,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:03:53,580 INFO L225 Difference]: With dead ends: 89 [2019-12-07 11:03:53,580 INFO L226 Difference]: Without dead ends: 87 [2019-12-07 11:03:53,581 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1085, Invalid=5887, Unknown=0, NotChecked=0, Total=6972 [2019-12-07 11:03:53,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-07 11:03:53,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2019-12-07 11:03:53,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-07 11:03:53,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2019-12-07 11:03:53,582 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 74 [2019-12-07 11:03:53,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:03:53,583 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2019-12-07 11:03:53,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-12-07 11:03:53,583 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2019-12-07 11:03:53,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-12-07 11:03:53,583 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:03:53,583 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:03:53,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:53,785 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:03:53,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:03:53,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2094394716, now seen corresponding path program 15 times [2019-12-07 11:03:53,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:03:53,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421625833] [2019-12-07 11:03:53,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:03:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:03:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 43 proven. 264 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:54,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421625833] [2019-12-07 11:03:54,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188058754] [2019-12-07 11:03:54,105 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:54,205 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:03:54,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:03:54,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 68 conjunts are in the unsatisfiable core [2019-12-07 11:03:54,208 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:03:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 43 proven. 264 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:54,289 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:03:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 43 proven. 264 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:03:54,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1774156957] [2019-12-07 11:03:54,385 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:03:54,386 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:03:54,386 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:03:54,386 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:03:54,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:03:54,480 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:03:54,778 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:03:55,016 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:03:55,831 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:03:56,016 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:03:56,254 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:03:56,503 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:03:56,782 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:03:57,318 WARN L192 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:03:57,326 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:03:57,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:03:57,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 28 [2019-12-07 11:03:57,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911002341] [2019-12-07 11:03:57,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-07 11:03:57,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:03:57,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-07 11:03:57,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1427, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 11:03:57,329 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 28 states. [2019-12-07 11:03:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:03:59,669 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2019-12-07 11:03:59,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-07 11:03:59,670 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2019-12-07 11:03:59,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:03:59,670 INFO L225 Difference]: With dead ends: 141 [2019-12-07 11:03:59,670 INFO L226 Difference]: Without dead ends: 87 [2019-12-07 11:03:59,671 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 217 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=359, Invalid=4333, Unknown=0, NotChecked=0, Total=4692 [2019-12-07 11:03:59,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-07 11:03:59,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-12-07 11:03:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-07 11:03:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2019-12-07 11:03:59,672 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 80 [2019-12-07 11:03:59,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:03:59,672 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2019-12-07 11:03:59,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-07 11:03:59,672 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2019-12-07 11:03:59,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-12-07 11:03:59,673 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:03:59,673 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:03:59,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:03:59,874 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:03:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:03:59,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1994177554, now seen corresponding path program 16 times [2019-12-07 11:03:59,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:03:59,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991343391] [2019-12-07 11:03:59,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:03:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:04:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 49 proven. 275 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:00,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991343391] [2019-12-07 11:04:00,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487961299] [2019-12-07 11:04:00,161 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:04:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:04:00,231 INFO L264 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 60 conjunts are in the unsatisfiable core [2019-12-07 11:04:00,233 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:04:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 64 proven. 260 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:00,412 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:04:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 64 proven. 260 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:00,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1604779288] [2019-12-07 11:04:00,861 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:04:00,861 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:04:00,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:04:00,861 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:04:00,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:04:00,919 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:04:01,205 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:04:01,457 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:04:02,401 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:04:02,679 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:04:03,127 WARN L192 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:04:03,709 WARN L192 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:04:04,314 WARN L192 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:04:04,317 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:04:04,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:04:04,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 43 [2019-12-07 11:04:04,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157905813] [2019-12-07 11:04:04,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-07 11:04:04,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:04:04,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-07 11:04:04,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2806, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 11:04:04,318 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 44 states. [2019-12-07 11:04:06,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:04:06,971 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2019-12-07 11:04:06,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-07 11:04:06,972 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 82 [2019-12-07 11:04:06,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:04:06,973 INFO L225 Difference]: With dead ends: 97 [2019-12-07 11:04:06,973 INFO L226 Difference]: Without dead ends: 95 [2019-12-07 11:04:06,974 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 201 SyntacticMatches, 10 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=914, Invalid=5092, Unknown=0, NotChecked=0, Total=6006 [2019-12-07 11:04:06,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-12-07 11:04:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2019-12-07 11:04:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-12-07 11:04:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2019-12-07 11:04:06,977 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 82 [2019-12-07 11:04:06,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:04:06,977 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2019-12-07 11:04:06,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-07 11:04:06,977 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2019-12-07 11:04:06,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-12-07 11:04:06,978 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:04:06,978 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:04:07,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:04:07,180 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:04:07,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:04:07,180 INFO L82 PathProgramCache]: Analyzing trace with hash -393414255, now seen corresponding path program 17 times [2019-12-07 11:04:07,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:04:07,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390058230] [2019-12-07 11:04:07,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:04:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:04:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 240 proven. 141 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:07,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390058230] [2019-12-07 11:04:07,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112989204] [2019-12-07 11:04:07,593 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:04:07,791 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-12-07 11:04:07,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:04:07,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 76 conjunts are in the unsatisfiable core [2019-12-07 11:04:07,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:04:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 48 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:08,492 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:04:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 48 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:09,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [91229332] [2019-12-07 11:04:09,069 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:04:09,069 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:04:09,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:04:09,069 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:04:09,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:04:09,442 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:04:09,733 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:04:10,281 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2019-12-07 11:04:10,729 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2019-12-07 11:04:11,149 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-12-07 11:04:11,512 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2019-12-07 11:04:11,967 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:04:12,497 WARN L192 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:04:12,981 WARN L192 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:04:13,356 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:04:14,009 WARN L192 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:04:14,440 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:04:14,442 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:04:14,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:04:14,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 60 [2019-12-07 11:04:14,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865843646] [2019-12-07 11:04:14,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-12-07 11:04:14,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:04:14,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-12-07 11:04:14,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=4818, Unknown=0, NotChecked=0, Total=5112 [2019-12-07 11:04:14,444 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 60 states. [2019-12-07 11:04:16,481 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2019-12-07 11:04:17,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:04:17,855 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2019-12-07 11:04:17,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-07 11:04:17,855 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 88 [2019-12-07 11:04:17,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:04:17,856 INFO L225 Difference]: With dead ends: 155 [2019-12-07 11:04:17,856 INFO L226 Difference]: Without dead ends: 95 [2019-12-07 11:04:17,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 211 SyntacticMatches, 6 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=749, Invalid=9963, Unknown=0, NotChecked=0, Total=10712 [2019-12-07 11:04:17,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-12-07 11:04:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2019-12-07 11:04:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-12-07 11:04:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2019-12-07 11:04:17,858 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 88 [2019-12-07 11:04:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:04:17,858 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2019-12-07 11:04:17,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-12-07 11:04:17,858 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2019-12-07 11:04:17,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-12-07 11:04:17,858 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:04:17,858 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:04:18,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:04:18,060 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:04:18,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:04:18,061 INFO L82 PathProgramCache]: Analyzing trace with hash -319924993, now seen corresponding path program 18 times [2019-12-07 11:04:18,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:04:18,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529174668] [2019-12-07 11:04:18,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:04:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:04:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 64 proven. 336 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:18,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529174668] [2019-12-07 11:04:18,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96528237] [2019-12-07 11:04:18,383 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:04:18,506 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:04:18,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:04:18,509 INFO L264 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 67 conjunts are in the unsatisfiable core [2019-12-07 11:04:18,510 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:04:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 81 proven. 319 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:19,286 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:04:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 100 proven. 300 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:20,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1127366035] [2019-12-07 11:04:20,227 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:04:20,227 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:04:20,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:04:20,227 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:04:20,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:04:20,312 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:04:20,597 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:04:20,881 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:04:22,100 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:04:22,455 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:04:22,845 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:04:23,290 WARN L192 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:04:23,943 WARN L192 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:04:23,946 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:04:23,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:04:23,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 70 [2019-12-07 11:04:23,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355390348] [2019-12-07 11:04:23,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-12-07 11:04:23,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:04:23,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-12-07 11:04:23,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=6267, Unknown=0, NotChecked=0, Total=6972 [2019-12-07 11:04:23,948 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 72 states. [2019-12-07 11:04:25,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:04:25,670 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2019-12-07 11:04:25,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-07 11:04:25,670 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 90 [2019-12-07 11:04:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:04:25,671 INFO L225 Difference]: With dead ends: 105 [2019-12-07 11:04:25,671 INFO L226 Difference]: Without dead ends: 103 [2019-12-07 11:04:25,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2737 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1329, Invalid=8177, Unknown=0, NotChecked=0, Total=9506 [2019-12-07 11:04:25,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-07 11:04:25,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2019-12-07 11:04:25,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-07 11:04:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2019-12-07 11:04:25,674 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 90 [2019-12-07 11:04:25,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:04:25,674 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2019-12-07 11:04:25,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-12-07 11:04:25,674 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2019-12-07 11:04:25,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-12-07 11:04:25,674 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:04:25,675 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:04:25,875 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:04:25,875 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:04:25,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:04:25,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2050059454, now seen corresponding path program 19 times [2019-12-07 11:04:25,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:04:25,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081297022] [2019-12-07 11:04:25,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:04:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:04:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 53 proven. 410 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:26,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081297022] [2019-12-07 11:04:26,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579785237] [2019-12-07 11:04:26,308 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:04:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:04:26,400 INFO L264 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 82 conjunts are in the unsatisfiable core [2019-12-07 11:04:26,402 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:04:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 53 proven. 410 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:27,340 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:04:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 53 proven. 410 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:28,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1029826968] [2019-12-07 11:04:28,017 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:04:28,017 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:04:28,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:04:28,017 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:04:28,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:04:28,108 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:04:28,399 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:04:28,883 WARN L192 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:04:30,346 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:04:30,665 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:04:31,079 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:04:31,543 WARN L192 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:04:32,372 WARN L192 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:04:32,379 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:04:32,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:04:32,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 65 [2019-12-07 11:04:32,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221621137] [2019-12-07 11:04:32,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-12-07 11:04:32,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:04:32,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-12-07 11:04:32,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=5734, Unknown=0, NotChecked=0, Total=6006 [2019-12-07 11:04:32,382 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 66 states. [2019-12-07 11:04:39,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:04:39,553 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2019-12-07 11:04:39,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-07 11:04:39,554 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 96 [2019-12-07 11:04:39,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:04:39,554 INFO L225 Difference]: With dead ends: 169 [2019-12-07 11:04:39,554 INFO L226 Difference]: Without dead ends: 103 [2019-12-07 11:04:39,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2390 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=556, Invalid=9950, Unknown=0, NotChecked=0, Total=10506 [2019-12-07 11:04:39,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-07 11:04:39,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2019-12-07 11:04:39,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-07 11:04:39,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2019-12-07 11:04:39,556 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 96 [2019-12-07 11:04:39,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:04:39,557 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2019-12-07 11:04:39,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-12-07 11:04:39,557 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2019-12-07 11:04:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-12-07 11:04:39,557 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:04:39,557 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:04:39,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:04:39,759 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:04:39,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:04:39,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1771079124, now seen corresponding path program 20 times [2019-12-07 11:04:39,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:04:39,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313501233] [2019-12-07 11:04:39,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:04:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:04:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 81 proven. 403 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:40,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313501233] [2019-12-07 11:04:40,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487552493] [2019-12-07 11:04:40,166 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:04:40,364 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-12-07 11:04:40,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:04:40,366 INFO L264 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 62 conjunts are in the unsatisfiable core [2019-12-07 11:04:40,368 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:04:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 100 proven. 384 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:41,123 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:04:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 121 proven. 363 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:42,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [213862656] [2019-12-07 11:04:42,660 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:04:42,660 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:04:42,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:04:42,660 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:04:42,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:04:42,764 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:04:43,075 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:04:43,357 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:04:43,835 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2019-12-07 11:04:44,215 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-12-07 11:04:44,553 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2019-12-07 11:04:45,127 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:04:46,014 WARN L192 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:04:46,359 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:04:47,002 WARN L192 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:04:47,494 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:04:47,497 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:04:47,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:04:47,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 76 [2019-12-07 11:04:47,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212994579] [2019-12-07 11:04:47,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-12-07 11:04:47,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:04:47,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-12-07 11:04:47,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=916, Invalid=7094, Unknown=0, NotChecked=0, Total=8010 [2019-12-07 11:04:47,498 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 78 states. [2019-12-07 11:04:48,495 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2019-12-07 11:04:48,857 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2019-12-07 11:04:49,204 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2019-12-07 11:04:49,534 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2019-12-07 11:04:49,840 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2019-12-07 11:04:50,190 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2019-12-07 11:04:50,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:04:50,569 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2019-12-07 11:04:50,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-07 11:04:50,570 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 98 [2019-12-07 11:04:50,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:04:50,570 INFO L225 Difference]: With dead ends: 113 [2019-12-07 11:04:50,570 INFO L226 Difference]: Without dead ends: 111 [2019-12-07 11:04:50,571 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1742, Invalid=9178, Unknown=0, NotChecked=0, Total=10920 [2019-12-07 11:04:50,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-07 11:04:50,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2019-12-07 11:04:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-12-07 11:04:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2019-12-07 11:04:50,573 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 98 [2019-12-07 11:04:50,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:04:50,573 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2019-12-07 11:04:50,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-12-07 11:04:50,573 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2019-12-07 11:04:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-12-07 11:04:50,573 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:04:50,573 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:04:50,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:04:50,775 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:04:50,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:04:50,776 INFO L82 PathProgramCache]: Analyzing trace with hash -772064213, now seen corresponding path program 21 times [2019-12-07 11:04:50,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:04:50,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480871532] [2019-12-07 11:04:50,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:04:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:04:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 58 proven. 495 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:51,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480871532] [2019-12-07 11:04:51,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058649619] [2019-12-07 11:04:51,277 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:04:51,460 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:04:51,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:04:51,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 86 conjunts are in the unsatisfiable core [2019-12-07 11:04:51,464 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:04:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 58 proven. 495 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:51,567 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:04:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 58 proven. 495 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:51,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1831153791] [2019-12-07 11:04:51,691 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:04:51,691 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:04:51,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:04:51,691 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:04:51,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:04:51,946 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:04:51,953 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:04:52,188 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:04:52,443 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:04:53,095 WARN L192 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2019-12-07 11:04:54,031 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:04:54,312 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:04:54,686 WARN L192 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:04:54,957 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:04:55,252 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:04:55,664 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:04:55,669 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:04:55,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:04:55,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 34 [2019-12-07 11:04:55,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201496148] [2019-12-07 11:04:55,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-07 11:04:55,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:04:55,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-07 11:04:55,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1936, Unknown=0, NotChecked=0, Total=2070 [2019-12-07 11:04:55,670 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 34 states. [2019-12-07 11:04:57,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:04:57,618 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2019-12-07 11:04:57,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-07 11:04:57,618 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 104 [2019-12-07 11:04:57,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:04:57,619 INFO L225 Difference]: With dead ends: 183 [2019-12-07 11:04:57,619 INFO L226 Difference]: Without dead ends: 111 [2019-12-07 11:04:57,619 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 289 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=426, Invalid=6546, Unknown=0, NotChecked=0, Total=6972 [2019-12-07 11:04:57,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-07 11:04:57,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2019-12-07 11:04:57,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-12-07 11:04:57,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2019-12-07 11:04:57,621 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 104 [2019-12-07 11:04:57,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:04:57,621 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2019-12-07 11:04:57,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-07 11:04:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2019-12-07 11:04:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-12-07 11:04:57,621 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:04:57,621 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:04:57,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:04:57,823 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:04:57,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:04:57,823 INFO L82 PathProgramCache]: Analyzing trace with hash -12321895, now seen corresponding path program 22 times [2019-12-07 11:04:57,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:04:57,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597852066] [2019-12-07 11:04:57,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:04:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:04:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 100 proven. 476 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:58,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597852066] [2019-12-07 11:04:58,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892567843] [2019-12-07 11:04:58,215 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:04:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:04:58,286 INFO L264 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 75 conjunts are in the unsatisfiable core [2019-12-07 11:04:58,287 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:04:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 121 proven. 455 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:58,584 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:04:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 121 proven. 455 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:04:59,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113304793] [2019-12-07 11:04:59,742 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:04:59,742 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:04:59,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:04:59,742 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:04:59,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:04:59,847 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:04:59,853 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:05:00,176 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:05:00,471 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:05:01,200 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-12-07 11:05:01,491 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2019-12-07 11:05:01,882 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:05:02,582 WARN L192 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:05:03,586 WARN L192 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:05:04,208 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:05:04,622 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:05:05,277 WARN L192 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:05:05,282 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:05:05,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:05:05,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 55 [2019-12-07 11:05:05,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249876149] [2019-12-07 11:05:05,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-12-07 11:05:05,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:05:05,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-12-07 11:05:05,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=4165, Unknown=0, NotChecked=0, Total=4556 [2019-12-07 11:05:05,284 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 56 states. [2019-12-07 11:05:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:05:10,881 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2019-12-07 11:05:10,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-07 11:05:10,881 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 106 [2019-12-07 11:05:10,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:05:10,882 INFO L225 Difference]: With dead ends: 121 [2019-12-07 11:05:10,882 INFO L226 Difference]: Without dead ends: 119 [2019-12-07 11:05:10,882 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 264 SyntacticMatches, 13 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1415, Invalid=7705, Unknown=0, NotChecked=0, Total=9120 [2019-12-07 11:05:10,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-07 11:05:10,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2019-12-07 11:05:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-07 11:05:10,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2019-12-07 11:05:10,884 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 106 [2019-12-07 11:05:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:05:10,884 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2019-12-07 11:05:10,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-12-07 11:05:10,884 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2019-12-07 11:05:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-12-07 11:05:10,885 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:05:10,885 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:05:11,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:05:11,086 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:05:11,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:05:11,087 INFO L82 PathProgramCache]: Analyzing trace with hash -709740584, now seen corresponding path program 23 times [2019-12-07 11:05:11,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:05:11,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646108622] [2019-12-07 11:05:11,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:05:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:05:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 63 proven. 588 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:05:13,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646108622] [2019-12-07 11:05:13,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568075478] [2019-12-07 11:05:13,146 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:05:13,403 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-12-07 11:05:13,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:05:13,406 INFO L264 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 94 conjunts are in the unsatisfiable core [2019-12-07 11:05:13,407 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:05:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 63 proven. 588 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:05:16,098 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:05:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 63 proven. 588 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:05:17,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1528907795] [2019-12-07 11:05:17,095 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:05:17,096 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:05:17,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:05:17,096 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:05:17,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:05:17,330 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:05:17,371 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:05:17,574 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:05:17,903 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:05:18,453 WARN L192 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2019-12-07 11:05:19,849 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:05:20,182 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:05:20,522 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:05:20,908 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:05:21,378 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:05:21,381 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:05:21,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:05:21,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 76 [2019-12-07 11:05:21,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731533650] [2019-12-07 11:05:21,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-12-07 11:05:21,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:05:21,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-12-07 11:05:21,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=7394, Unknown=0, NotChecked=0, Total=7656 [2019-12-07 11:05:21,382 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 76 states. [2019-12-07 11:05:27,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:05:27,848 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2019-12-07 11:05:27,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-07 11:05:27,849 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 112 [2019-12-07 11:05:27,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:05:27,850 INFO L225 Difference]: With dead ends: 197 [2019-12-07 11:05:27,850 INFO L226 Difference]: Without dead ends: 119 [2019-12-07 11:05:27,851 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 273 SyntacticMatches, 7 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 13 DeprecatedPredicates, 3554 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=658, Invalid=15854, Unknown=0, NotChecked=0, Total=16512 [2019-12-07 11:05:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-07 11:05:27,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2019-12-07 11:05:27,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-07 11:05:27,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2019-12-07 11:05:27,854 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 112 [2019-12-07 11:05:27,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:05:27,854 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2019-12-07 11:05:27,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-12-07 11:05:27,854 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2019-12-07 11:05:27,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-12-07 11:05:27,854 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:05:27,855 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:05:28,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:05:28,056 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:05:28,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:05:28,056 INFO L82 PathProgramCache]: Analyzing trace with hash -13391546, now seen corresponding path program 24 times [2019-12-07 11:05:28,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:05:28,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227997032] [2019-12-07 11:05:28,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:05:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:05:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 121 proven. 555 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:05:28,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227997032] [2019-12-07 11:05:28,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539347559] [2019-12-07 11:05:28,520 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:05:28,711 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:05:28,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:05:28,714 INFO L264 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 82 conjunts are in the unsatisfiable core [2019-12-07 11:05:28,715 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:05:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 144 proven. 532 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:05:29,671 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:05:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 169 proven. 507 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:05:30,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1529707994] [2019-12-07 11:05:30,929 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:05:30,929 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:05:30,929 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:05:30,929 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:05:30,929 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:05:31,194 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:05:31,211 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:05:31,416 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:05:31,761 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:05:32,296 WARN L192 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2019-12-07 11:05:33,362 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:05:33,897 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:05:34,244 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:05:34,870 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:05:35,481 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:05:35,484 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:05:35,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:05:35,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 88 [2019-12-07 11:05:35,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656192609] [2019-12-07 11:05:35,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-12-07 11:05:35,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:05:35,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-12-07 11:05:35,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1033, Invalid=9269, Unknown=0, NotChecked=0, Total=10302 [2019-12-07 11:05:35,486 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 90 states. [2019-12-07 11:05:37,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:05:37,898 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2019-12-07 11:05:37,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-07 11:05:37,899 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 114 [2019-12-07 11:05:37,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:05:37,899 INFO L225 Difference]: With dead ends: 129 [2019-12-07 11:05:37,899 INFO L226 Difference]: Without dead ends: 127 [2019-12-07 11:05:37,900 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4038 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1969, Invalid=12073, Unknown=0, NotChecked=0, Total=14042 [2019-12-07 11:05:37,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-12-07 11:05:37,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2019-12-07 11:05:37,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-07 11:05:37,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2019-12-07 11:05:37,902 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 114 [2019-12-07 11:05:37,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:05:37,902 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2019-12-07 11:05:37,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-12-07 11:05:37,902 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2019-12-07 11:05:37,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-12-07 11:05:37,902 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:05:37,903 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:05:38,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:05:38,103 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:05:38,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:05:38,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1006776261, now seen corresponding path program 25 times [2019-12-07 11:05:38,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:05:38,104 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537228512] [2019-12-07 11:05:38,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:05:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:05:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 68 proven. 689 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:05:38,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537228512] [2019-12-07 11:05:38,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505210612] [2019-12-07 11:05:38,643 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:05:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:05:38,738 INFO L264 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 89 conjunts are in the unsatisfiable core [2019-12-07 11:05:38,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:05:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 144 proven. 613 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:05:40,314 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:05:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 144 proven. 613 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:05:42,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [196406656] [2019-12-07 11:05:42,696 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:05:42,696 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:05:42,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:05:42,696 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:05:42,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:05:42,948 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:05:42,962 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:05:43,173 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:05:44,153 WARN L192 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:05:44,939 WARN L192 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2019-12-07 11:05:46,187 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:05:46,820 WARN L192 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:05:47,508 WARN L192 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:05:48,162 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:05:48,766 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:05:48,769 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:05:48,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:05:48,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 84 [2019-12-07 11:05:48,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821261562] [2019-12-07 11:05:48,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-12-07 11:05:48,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:05:48,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-12-07 11:05:48,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=8540, Unknown=0, NotChecked=0, Total=9120 [2019-12-07 11:05:48,771 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 84 states. [2019-12-07 11:05:56,646 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2019-12-07 11:05:57,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:05:57,854 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2019-12-07 11:05:57,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-12-07 11:05:57,854 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 120 [2019-12-07 11:05:57,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:05:57,855 INFO L225 Difference]: With dead ends: 222 [2019-12-07 11:05:57,855 INFO L226 Difference]: Without dead ends: 136 [2019-12-07 11:05:57,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 283 SyntacticMatches, 14 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4307 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1960, Invalid=20092, Unknown=0, NotChecked=0, Total=22052 [2019-12-07 11:05:57,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-12-07 11:05:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2019-12-07 11:05:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-12-07 11:05:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2019-12-07 11:05:57,858 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 120 [2019-12-07 11:05:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:05:57,858 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2019-12-07 11:05:57,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-12-07 11:05:57,858 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2019-12-07 11:05:57,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-12-07 11:05:57,858 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:05:57,858 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:05:58,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:05:58,059 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:05:58,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:05:58,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1367012338, now seen corresponding path program 26 times [2019-12-07 11:05:58,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:05:58,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51780417] [2019-12-07 11:05:58,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:05:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:05:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 73 proven. 798 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:05:58,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51780417] [2019-12-07 11:05:58,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932932929] [2019-12-07 11:05:58,674 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:05:59,045 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-12-07 11:05:59,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:05:59,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 106 conjunts are in the unsatisfiable core [2019-12-07 11:05:59,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:05:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 73 proven. 798 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:05:59,185 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:05:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 73 proven. 798 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:05:59,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [580340083] [2019-12-07 11:05:59,345 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:05:59,345 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:05:59,345 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:05:59,345 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:05:59,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:05:59,420 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:05:59,747 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:06:00,041 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:06:01,066 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:06:01,347 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:06:01,637 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:06:02,041 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:06:02,457 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:06:02,460 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:06:02,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:06:02,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 40 [2019-12-07 11:06:02,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645611187] [2019-12-07 11:06:02,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-07 11:06:02,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:06:02,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-07 11:06:02,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2495, Unknown=0, NotChecked=0, Total=2652 [2019-12-07 11:06:02,462 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 40 states. [2019-12-07 11:06:08,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:06:08,981 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2019-12-07 11:06:08,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-12-07 11:06:08,982 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 128 [2019-12-07 11:06:08,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:06:08,982 INFO L225 Difference]: With dead ends: 225 [2019-12-07 11:06:08,982 INFO L226 Difference]: Without dead ends: 135 [2019-12-07 11:06:08,983 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 361 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=515, Invalid=9187, Unknown=0, NotChecked=0, Total=9702 [2019-12-07 11:06:08,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-12-07 11:06:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2019-12-07 11:06:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-07 11:06:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2019-12-07 11:06:08,984 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 128 [2019-12-07 11:06:08,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:06:08,985 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2019-12-07 11:06:08,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-07 11:06:08,985 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2019-12-07 11:06:08,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-12-07 11:06:08,985 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:06:08,985 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:06:09,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:06:09,186 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:06:09,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:06:09,186 INFO L82 PathProgramCache]: Analyzing trace with hash -50869920, now seen corresponding path program 27 times [2019-12-07 11:06:09,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:06:09,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430235045] [2019-12-07 11:06:09,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:06:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:06:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 169 proven. 731 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:06:09,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430235045] [2019-12-07 11:06:09,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308916216] [2019-12-07 11:06:09,710 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:06:10,033 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:06:10,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:06:10,037 INFO L264 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 96 conjunts are in the unsatisfiable core [2019-12-07 11:06:10,038 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:06:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 196 proven. 704 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:06:12,338 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:06:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 225 proven. 675 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:06:16,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2144640552] [2019-12-07 11:06:16,258 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:06:16,258 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:06:16,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:06:16,258 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:06:16,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:06:16,348 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:06:16,674 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:06:17,001 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:06:18,553 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:06:19,255 WARN L192 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:06:19,605 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:06:20,299 WARN L192 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:06:20,817 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:06:20,820 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:06:20,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:06:20,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 99 [2019-12-07 11:06:20,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13622172] [2019-12-07 11:06:20,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-12-07 11:06:20,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:06:20,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-12-07 11:06:20,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=11475, Unknown=0, NotChecked=0, Total=12656 [2019-12-07 11:06:20,822 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 101 states. [2019-12-07 11:06:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:06:23,744 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2019-12-07 11:06:23,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-07 11:06:23,744 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 130 [2019-12-07 11:06:23,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:06:23,745 INFO L225 Difference]: With dead ends: 145 [2019-12-07 11:06:23,745 INFO L226 Difference]: Without dead ends: 143 [2019-12-07 11:06:23,746 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4833 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=2320, Invalid=14710, Unknown=0, NotChecked=0, Total=17030 [2019-12-07 11:06:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-07 11:06:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2019-12-07 11:06:23,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-07 11:06:23,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2019-12-07 11:06:23,747 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 130 [2019-12-07 11:06:23,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:06:23,748 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2019-12-07 11:06:23,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-12-07 11:06:23,748 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2019-12-07 11:06:23,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-12-07 11:06:23,748 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:06:23,748 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:06:23,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:06:23,950 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:06:23,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:06:23,950 INFO L82 PathProgramCache]: Analyzing trace with hash -40872865, now seen corresponding path program 28 times [2019-12-07 11:06:23,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:06:23,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651104303] [2019-12-07 11:06:23,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:06:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:06:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 78 proven. 915 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:06:24,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651104303] [2019-12-07 11:06:24,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089003405] [2019-12-07 11:06:24,624 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:06:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:06:24,729 INFO L264 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 112 conjunts are in the unsatisfiable core [2019-12-07 11:06:24,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:06:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 78 proven. 915 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:06:29,682 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:06:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 78 proven. 915 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:06:31,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1849812210] [2019-12-07 11:06:31,415 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:06:31,415 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:06:31,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:06:31,416 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:06:31,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:06:31,512 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:06:31,809 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:06:32,183 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:06:33,443 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:06:33,898 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:06:34,450 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:06:34,804 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:06:35,217 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:06:35,751 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:06:35,755 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:06:35,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:06:35,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 90 [2019-12-07 11:06:35,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407176802] [2019-12-07 11:06:35,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-12-07 11:06:35,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:06:35,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-12-07 11:06:35,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=10159, Unknown=0, NotChecked=0, Total=10506 [2019-12-07 11:06:35,756 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 91 states. [2019-12-07 11:06:47,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:06:47,007 INFO L93 Difference]: Finished difference Result 239 states and 241 transitions. [2019-12-07 11:06:47,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-12-07 11:06:47,007 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 136 [2019-12-07 11:06:47,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:06:47,008 INFO L225 Difference]: With dead ends: 239 [2019-12-07 11:06:47,008 INFO L226 Difference]: Without dead ends: 143 [2019-12-07 11:06:47,009 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 341 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4240 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=741, Invalid=18165, Unknown=0, NotChecked=0, Total=18906 [2019-12-07 11:06:47,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-07 11:06:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-12-07 11:06:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-07 11:06:47,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2019-12-07 11:06:47,010 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 136 [2019-12-07 11:06:47,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:06:47,011 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2019-12-07 11:06:47,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-12-07 11:06:47,011 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2019-12-07 11:06:47,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-12-07 11:06:47,011 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:06:47,011 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:06:47,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:06:47,212 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:06:47,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:06:47,212 INFO L82 PathProgramCache]: Analyzing trace with hash 315612109, now seen corresponding path program 29 times [2019-12-07 11:06:47,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:06:47,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266964514] [2019-12-07 11:06:47,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:06:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:06:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 196 proven. 828 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:06:47,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266964514] [2019-12-07 11:06:47,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046339790] [2019-12-07 11:06:47,789 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:06:48,083 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-12-07 11:06:48,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:06:48,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 82 conjunts are in the unsatisfiable core [2019-12-07 11:06:48,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:06:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 225 proven. 799 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:06:50,135 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:06:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 256 proven. 768 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:06:54,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458977993] [2019-12-07 11:06:54,027 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:06:54,027 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:06:54,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:06:54,028 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:06:54,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:06:54,125 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:06:54,440 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:06:54,789 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:06:55,480 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-12-07 11:06:56,297 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:06:56,644 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:06:56,963 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:06:57,831 WARN L192 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:06:58,383 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:06:58,386 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:06:58,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:06:58,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 106 [2019-12-07 11:06:58,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573639892] [2019-12-07 11:06:58,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 108 states [2019-12-07 11:06:58,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:06:58,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2019-12-07 11:06:58,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1691, Invalid=12589, Unknown=0, NotChecked=0, Total=14280 [2019-12-07 11:06:58,388 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 108 states. [2019-12-07 11:07:00,453 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2019-12-07 11:07:01,347 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2019-12-07 11:07:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:07:02,676 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2019-12-07 11:07:02,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-07 11:07:02,677 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 138 [2019-12-07 11:07:02,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:07:02,680 INFO L225 Difference]: With dead ends: 153 [2019-12-07 11:07:02,680 INFO L226 Difference]: Without dead ends: 151 [2019-12-07 11:07:02,682 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=3197, Invalid=16263, Unknown=0, NotChecked=0, Total=19460 [2019-12-07 11:07:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-07 11:07:02,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2019-12-07 11:07:02,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-07 11:07:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2019-12-07 11:07:02,689 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 138 [2019-12-07 11:07:02,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:07:02,690 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2019-12-07 11:07:02,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 108 states. [2019-12-07 11:07:02,690 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2019-12-07 11:07:02,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-12-07 11:07:02,692 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:07:02,693 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:07:02,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:07:02,894 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:07:02,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:07:02,895 INFO L82 PathProgramCache]: Analyzing trace with hash 127541516, now seen corresponding path program 30 times [2019-12-07 11:07:02,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:07:02,895 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905790274] [2019-12-07 11:07:02,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:07:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:07:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 83 proven. 1040 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:07:03,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905790274] [2019-12-07 11:07:03,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025943834] [2019-12-07 11:07:03,692 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:07:04,044 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:07:04,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:07:04,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 116 conjunts are in the unsatisfiable core [2019-12-07 11:07:04,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:07:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 83 proven. 1040 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:07:04,197 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:07:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 83 proven. 1040 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:07:04,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1965715444] [2019-12-07 11:07:04,370 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:07:04,370 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:07:04,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:07:04,371 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:07:04,371 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:07:04,444 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:07:04,724 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:07:05,009 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:07:06,068 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:07:06,352 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:07:06,752 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:07:07,250 WARN L192 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:07:07,809 WARN L192 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:07:07,813 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:07:07,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:07:07,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 44 [2019-12-07 11:07:07,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834929801] [2019-12-07 11:07:07,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-07 11:07:07,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:07:07,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-07 11:07:07,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2915, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 11:07:07,814 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 44 states. [2019-12-07 11:07:15,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:07:15,941 INFO L93 Difference]: Finished difference Result 253 states and 255 transitions. [2019-12-07 11:07:15,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-12-07 11:07:15,941 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 144 [2019-12-07 11:07:15,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:07:15,942 INFO L225 Difference]: With dead ends: 253 [2019-12-07 11:07:15,942 INFO L226 Difference]: Without dead ends: 151 [2019-12-07 11:07:15,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 409 SyntacticMatches, 6 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=567, Invalid=11205, Unknown=0, NotChecked=0, Total=11772 [2019-12-07 11:07:15,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-07 11:07:15,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2019-12-07 11:07:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-07 11:07:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2019-12-07 11:07:15,945 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 144 [2019-12-07 11:07:15,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:07:15,945 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2019-12-07 11:07:15,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-07 11:07:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2019-12-07 11:07:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-12-07 11:07:15,945 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:07:15,946 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:07:16,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:07:16,147 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:07:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:07:16,148 INFO L82 PathProgramCache]: Analyzing trace with hash 969562746, now seen corresponding path program 31 times [2019-12-07 11:07:16,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:07:16,148 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888037349] [2019-12-07 11:07:16,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:07:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:07:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 225 proven. 931 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:07:18,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888037349] [2019-12-07 11:07:18,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763188296] [2019-12-07 11:07:18,223 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:07:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:07:18,315 INFO L264 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 100 conjunts are in the unsatisfiable core [2019-12-07 11:07:18,316 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:07:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 256 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:07:18,875 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:07:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 256 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:07:22,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1062481346] [2019-12-07 11:07:22,080 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:07:22,080 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:07:22,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:07:22,080 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:07:22,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:07:22,471 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:07:22,781 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:07:23,435 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2019-12-07 11:07:24,232 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:07:24,820 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:07:25,426 WARN L192 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:07:25,756 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:07:26,172 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:07:26,764 WARN L192 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:07:26,767 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:07:26,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:07:26,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 75 [2019-12-07 11:07:26,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422178619] [2019-12-07 11:07:26,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-12-07 11:07:26,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:07:26,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-12-07 11:07:26,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=7010, Unknown=0, NotChecked=0, Total=7656 [2019-12-07 11:07:26,769 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 76 states. [2019-12-07 11:07:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:07:33,586 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2019-12-07 11:07:33,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-07 11:07:33,587 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 146 [2019-12-07 11:07:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:07:33,590 INFO L225 Difference]: With dead ends: 161 [2019-12-07 11:07:33,590 INFO L226 Difference]: Without dead ends: 159 [2019-12-07 11:07:33,591 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 369 SyntacticMatches, 18 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3722 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=2510, Invalid=13240, Unknown=0, NotChecked=0, Total=15750 [2019-12-07 11:07:33,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-07 11:07:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2019-12-07 11:07:33,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-07 11:07:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2019-12-07 11:07:33,597 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 146 [2019-12-07 11:07:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:07:33,598 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2019-12-07 11:07:33,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-12-07 11:07:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2019-12-07 11:07:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-12-07 11:07:33,599 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:07:33,600 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:07:33,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:07:33,801 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:07:33,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:07:33,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1680594439, now seen corresponding path program 32 times [2019-12-07 11:07:33,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:07:33,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820338204] [2019-12-07 11:07:33,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:07:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:07:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 856 proven. 405 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:07:35,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820338204] [2019-12-07 11:07:35,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164492135] [2019-12-07 11:07:35,142 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:07:35,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-12-07 11:07:35,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:07:35,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 124 conjunts are in the unsatisfiable core [2019-12-07 11:07:35,754 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:07:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 88 proven. 1173 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:07:38,846 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:07:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 88 proven. 1173 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:07:40,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [380225312] [2019-12-07 11:07:40,552 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:07:40,553 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:07:40,553 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:07:40,553 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:07:40,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:07:40,787 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:07:40,792 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:07:41,024 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:07:41,387 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:07:41,946 WARN L192 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2019-12-07 11:07:42,736 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-12-07 11:07:43,418 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:07:43,847 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:07:44,205 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:07:44,636 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:07:45,393 WARN L192 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:07:45,400 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:07:45,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:07:45,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 100 [2019-12-07 11:07:45,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472090914] [2019-12-07 11:07:45,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-12-07 11:07:45,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:07:45,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-12-07 11:07:45,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=11837, Unknown=0, NotChecked=0, Total=12432 [2019-12-07 11:07:45,402 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 100 states. [2019-12-07 11:07:56,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:07:56,301 INFO L93 Difference]: Finished difference Result 267 states and 269 transitions. [2019-12-07 11:07:56,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-12-07 11:07:56,302 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 152 [2019-12-07 11:07:56,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:07:56,302 INFO L225 Difference]: With dead ends: 267 [2019-12-07 11:07:56,302 INFO L226 Difference]: Without dead ends: 159 [2019-12-07 11:07:56,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 376 SyntacticMatches, 9 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 18 DeprecatedPredicates, 8020 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=1606, Invalid=26450, Unknown=0, NotChecked=0, Total=28056 [2019-12-07 11:07:56,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-07 11:07:56,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2019-12-07 11:07:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-07 11:07:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2019-12-07 11:07:56,308 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 152 [2019-12-07 11:07:56,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:07:56,308 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2019-12-07 11:07:56,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-12-07 11:07:56,308 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2019-12-07 11:07:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-12-07 11:07:56,309 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:07:56,309 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:07:56,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:07:56,510 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:07:56,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:07:56,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1876748953, now seen corresponding path program 33 times [2019-12-07 11:07:56,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:07:56,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656237633] [2019-12-07 11:07:56,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:07:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:07:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 256 proven. 1040 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:07:57,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656237633] [2019-12-07 11:07:57,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518754183] [2019-12-07 11:07:57,230 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:07:57,582 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:07:57,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:07:57,586 INFO L264 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 111 conjunts are in the unsatisfiable core [2019-12-07 11:07:57,588 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:07:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 289 proven. 1007 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:07:59,248 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:08:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 324 proven. 972 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:08:04,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [325698658] [2019-12-07 11:08:04,989 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:08:04,989 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:08:04,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:08:04,990 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:08:04,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:08:05,087 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:08:05,387 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:08:05,761 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:08:06,746 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-12-07 11:08:07,144 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2019-12-07 11:08:07,610 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:08:07,986 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:08:08,555 WARN L192 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:08:09,323 WARN L192 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:08:10,620 WARN L192 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:08:11,201 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:08:11,205 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:08:11,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:08:11,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 117 [2019-12-07 11:08:11,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528482157] [2019-12-07 11:08:11,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 119 states [2019-12-07 11:08:11,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:08:11,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2019-12-07 11:08:11,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1589, Invalid=15441, Unknown=0, NotChecked=0, Total=17030 [2019-12-07 11:08:11,207 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 119 states. [2019-12-07 11:08:15,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:08:15,599 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2019-12-07 11:08:15,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-07 11:08:15,600 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 154 [2019-12-07 11:08:15,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:08:15,600 INFO L225 Difference]: With dead ends: 169 [2019-12-07 11:08:15,600 INFO L226 Difference]: Without dead ends: 167 [2019-12-07 11:08:15,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6531 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=3139, Invalid=19813, Unknown=0, NotChecked=0, Total=22952 [2019-12-07 11:08:15,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-12-07 11:08:15,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2019-12-07 11:08:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-12-07 11:08:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2019-12-07 11:08:15,603 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 154 [2019-12-07 11:08:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:08:15,603 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2019-12-07 11:08:15,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 119 states. [2019-12-07 11:08:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2019-12-07 11:08:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-12-07 11:08:15,603 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:08:15,604 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:08:15,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:08:15,805 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:08:15,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:08:15,806 INFO L82 PathProgramCache]: Analyzing trace with hash 274612006, now seen corresponding path program 34 times [2019-12-07 11:08:15,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:08:15,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337777769] [2019-12-07 11:08:15,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:08:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:08:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 93 proven. 1314 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:08:16,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337777769] [2019-12-07 11:08:16,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678747097] [2019-12-07 11:08:16,701 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:08:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:08:16,829 INFO L264 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 130 conjunts are in the unsatisfiable core [2019-12-07 11:08:16,831 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:08:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 93 proven. 1314 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:08:20,908 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:08:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 93 proven. 1314 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:08:25,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [578473553] [2019-12-07 11:08:25,504 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:08:25,504 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:08:25,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:08:25,505 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:08:25,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:08:25,614 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:08:25,920 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:08:26,304 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:08:28,082 WARN L192 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:08:28,883 WARN L192 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:08:29,588 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:08:30,499 WARN L192 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:08:31,429 WARN L192 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:08:32,069 WARN L192 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:08:32,074 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:08:32,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:08:32,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 105 [2019-12-07 11:08:32,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379670082] [2019-12-07 11:08:32,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-12-07 11:08:32,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:08:32,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-12-07 11:08:32,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=13414, Unknown=0, NotChecked=0, Total=13806 [2019-12-07 11:08:32,076 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 106 states. [2019-12-07 11:08:45,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:08:45,453 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2019-12-07 11:08:45,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-12-07 11:08:45,454 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 160 [2019-12-07 11:08:45,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:08:45,455 INFO L225 Difference]: With dead ends: 281 [2019-12-07 11:08:45,455 INFO L226 Difference]: Without dead ends: 167 [2019-12-07 11:08:45,456 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5602 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=852, Invalid=24270, Unknown=0, NotChecked=0, Total=25122 [2019-12-07 11:08:45,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-12-07 11:08:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2019-12-07 11:08:45,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-12-07 11:08:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2019-12-07 11:08:45,458 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 160 [2019-12-07 11:08:45,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:08:45,458 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2019-12-07 11:08:45,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 106 states. [2019-12-07 11:08:45,458 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2019-12-07 11:08:45,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-12-07 11:08:45,459 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:08:45,459 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:08:45,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:08:45,660 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:08:45,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:08:45,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1576656020, now seen corresponding path program 35 times [2019-12-07 11:08:45,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:08:45,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823734662] [2019-12-07 11:08:45,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:08:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:08:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 289 proven. 1155 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:08:46,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823734662] [2019-12-07 11:08:46,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68009241] [2019-12-07 11:08:46,452 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:08:47,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-12-07 11:08:47,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:08:47,363 INFO L264 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 96 conjunts are in the unsatisfiable core [2019-12-07 11:08:47,364 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:08:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 324 proven. 1120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:08:49,085 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:08:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 324 proven. 1120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:08:55,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [617671784] [2019-12-07 11:08:55,161 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:08:55,161 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:08:55,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:08:55,161 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:08:55,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:08:55,396 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:08:55,402 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:08:55,630 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:08:56,009 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:08:56,621 WARN L192 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2019-12-07 11:08:57,895 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:08:58,253 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:08:58,720 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:08:59,450 WARN L192 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:09:00,423 WARN L192 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:09:00,430 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:09:00,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:09:00,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 125 [2019-12-07 11:09:00,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488635544] [2019-12-07 11:09:00,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 126 states [2019-12-07 11:09:00,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:09:00,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2019-12-07 11:09:00,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1820, Invalid=17086, Unknown=0, NotChecked=0, Total=18906 [2019-12-07 11:09:00,432 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 126 states. [2019-12-07 11:09:07,003 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2019-12-07 11:09:07,568 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2019-12-07 11:09:08,110 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2019-12-07 11:09:09,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:09:09,671 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2019-12-07 11:09:09,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-07 11:09:09,672 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 162 [2019-12-07 11:09:09,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:09:09,673 INFO L225 Difference]: With dead ends: 177 [2019-12-07 11:09:09,673 INFO L226 Difference]: Without dead ends: 175 [2019-12-07 11:09:09,675 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8011 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=4987, Invalid=27233, Unknown=0, NotChecked=0, Total=32220 [2019-12-07 11:09:09,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-07 11:09:09,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2019-12-07 11:09:09,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-12-07 11:09:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2019-12-07 11:09:09,678 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 162 [2019-12-07 11:09:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:09:09,679 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2019-12-07 11:09:09,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 126 states. [2019-12-07 11:09:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2019-12-07 11:09:09,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-12-07 11:09:09,680 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:09:09,681 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:09:09,881 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:09:09,882 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:09:09,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:09:09,883 INFO L82 PathProgramCache]: Analyzing trace with hash -365154157, now seen corresponding path program 36 times [2019-12-07 11:09:09,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:09:09,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576946439] [2019-12-07 11:09:09,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:09:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:09:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1562 backedges. 98 proven. 1463 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:09:10,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576946439] [2019-12-07 11:09:10,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091556834] [2019-12-07 11:09:10,907 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:09:11,461 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:09:11,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:09:11,467 INFO L264 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 134 conjunts are in the unsatisfiable core [2019-12-07 11:09:11,469 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:09:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1562 backedges. 98 proven. 1463 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:09:11,649 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:09:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1562 backedges. 98 proven. 1463 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:09:11,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [756431016] [2019-12-07 11:09:11,861 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:09:11,861 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:09:11,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:09:11,862 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:09:11,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:09:11,953 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:09:12,244 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:09:12,554 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:09:13,874 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:09:14,406 WARN L192 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:09:14,717 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:09:15,032 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:09:15,400 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:09:15,821 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:09:15,825 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:09:15,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:09:15,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 50 [2019-12-07 11:09:15,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047112261] [2019-12-07 11:09:15,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-12-07 11:09:15,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:09:15,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-12-07 11:09:15,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3605, Unknown=0, NotChecked=0, Total=3782 [2019-12-07 11:09:15,826 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand 50 states. [2019-12-07 11:09:26,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:09:26,260 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2019-12-07 11:09:26,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-12-07 11:09:26,261 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 168 [2019-12-07 11:09:26,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:09:26,262 INFO L225 Difference]: With dead ends: 295 [2019-12-07 11:09:26,262 INFO L226 Difference]: Without dead ends: 175 [2019-12-07 11:09:26,262 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 481 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2734 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=645, Invalid=14607, Unknown=0, NotChecked=0, Total=15252 [2019-12-07 11:09:26,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-07 11:09:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2019-12-07 11:09:26,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-12-07 11:09:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2019-12-07 11:09:26,264 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 168 [2019-12-07 11:09:26,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:09:26,264 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2019-12-07 11:09:26,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-12-07 11:09:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2019-12-07 11:09:26,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-12-07 11:09:26,265 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:09:26,265 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:09:26,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:09:26,466 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:09:26,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:09:26,466 INFO L82 PathProgramCache]: Analyzing trace with hash 441614337, now seen corresponding path program 37 times [2019-12-07 11:09:26,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:09:26,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242371059] [2019-12-07 11:09:26,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:09:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:09:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 324 proven. 1276 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:09:27,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242371059] [2019-12-07 11:09:27,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705712195] [2019-12-07 11:09:27,293 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:09:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:09:27,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 115 conjunts are in the unsatisfiable core [2019-12-07 11:09:27,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:09:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 361 proven. 1239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:09:28,136 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:09:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 361 proven. 1239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:09:30,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1315915896] [2019-12-07 11:09:30,699 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:09:30,699 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:09:30,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:09:30,699 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:09:30,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:09:30,787 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:09:31,074 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:09:31,417 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:09:33,129 WARN L192 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:09:33,961 WARN L192 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:09:34,306 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:09:35,496 WARN L192 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:09:36,020 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:09:36,024 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:09:36,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:09:36,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 87 [2019-12-07 11:09:36,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257385295] [2019-12-07 11:09:36,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-12-07 11:09:36,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:09:36,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-12-07 11:09:36,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=9065, Unknown=0, NotChecked=0, Total=9900 [2019-12-07 11:09:36,026 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand 88 states. [2019-12-07 11:09:39,885 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2019-12-07 11:09:40,507 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2019-12-07 11:09:41,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:09:41,772 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2019-12-07 11:09:41,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-12-07 11:09:41,772 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 170 [2019-12-07 11:09:41,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:09:41,773 INFO L225 Difference]: With dead ends: 185 [2019-12-07 11:09:41,773 INFO L226 Difference]: Without dead ends: 183 [2019-12-07 11:09:41,774 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 432 SyntacticMatches, 21 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4877 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=3323, Invalid=17269, Unknown=0, NotChecked=0, Total=20592 [2019-12-07 11:09:41,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-07 11:09:41,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2019-12-07 11:09:41,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-12-07 11:09:41,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2019-12-07 11:09:41,776 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 170 [2019-12-07 11:09:41,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:09:41,776 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2019-12-07 11:09:41,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-12-07 11:09:41,776 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2019-12-07 11:09:41,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-12-07 11:09:41,777 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:09:41,777 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:09:41,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:09:41,978 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:09:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:09:41,979 INFO L82 PathProgramCache]: Analyzing trace with hash 576048704, now seen corresponding path program 38 times [2019-12-07 11:09:41,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:09:41,979 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228695188] [2019-12-07 11:09:41,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:09:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:09:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1724 backedges. 103 proven. 1620 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:09:45,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228695188] [2019-12-07 11:09:45,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944162250] [2019-12-07 11:09:45,075 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:09:46,204 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-12-07 11:09:46,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:09:46,210 INFO L264 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 140 conjunts are in the unsatisfiable core [2019-12-07 11:09:46,212 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:09:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1724 backedges. 103 proven. 1620 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:09:46,394 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:09:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1724 backedges. 103 proven. 1620 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:09:46,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1408099206] [2019-12-07 11:09:46,613 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:09:46,613 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:09:46,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:09:46,614 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:09:46,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:09:46,705 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:09:47,012 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:09:47,335 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:09:48,697 WARN L192 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:09:48,969 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:09:49,282 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:09:49,584 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:09:49,963 WARN L192 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:09:50,539 WARN L192 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:09:50,544 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:09:50,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:09:50,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 52 [2019-12-07 11:09:50,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136006587] [2019-12-07 11:09:50,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-12-07 11:09:50,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:09:50,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-12-07 11:09:50,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3851, Unknown=0, NotChecked=0, Total=4032 [2019-12-07 11:09:50,545 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand 52 states. [2019-12-07 11:10:01,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:10:01,287 INFO L93 Difference]: Finished difference Result 309 states and 311 transitions. [2019-12-07 11:10:01,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-12-07 11:10:01,288 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 176 [2019-12-07 11:10:01,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:10:01,288 INFO L225 Difference]: With dead ends: 309 [2019-12-07 11:10:01,289 INFO L226 Difference]: Without dead ends: 183 [2019-12-07 11:10:01,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 505 SyntacticMatches, 6 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2957 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=671, Invalid=15841, Unknown=0, NotChecked=0, Total=16512 [2019-12-07 11:10:01,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-07 11:10:01,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2019-12-07 11:10:01,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-12-07 11:10:01,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2019-12-07 11:10:01,291 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 176 [2019-12-07 11:10:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:10:01,291 INFO L462 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2019-12-07 11:10:01,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-12-07 11:10:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2019-12-07 11:10:01,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-12-07 11:10:01,291 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:10:01,292 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:10:01,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:10:01,493 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:10:01,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:10:01,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1340813394, now seen corresponding path program 39 times [2019-12-07 11:10:01,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:10:01,494 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105785326] [2019-12-07 11:10:01,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:10:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:10:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 361 proven. 1403 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:10:02,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105785326] [2019-12-07 11:10:02,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756719501] [2019-12-07 11:10:02,418 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:10:02,925 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:10:02,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:10:02,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 126 conjunts are in the unsatisfiable core [2019-12-07 11:10:02,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:10:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 400 proven. 1364 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:10:06,539 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:10:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 441 proven. 1323 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:10:15,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83500348] [2019-12-07 11:10:15,867 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:10:15,867 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:10:15,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:10:15,867 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:10:15,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:10:15,929 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:10:16,213 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:10:16,632 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:10:18,533 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:10:19,262 WARN L192 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:10:19,682 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:10:20,518 WARN L192 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:10:21,633 WARN L192 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:10:22,539 WARN L192 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:10:22,547 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:10:22,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:10:22,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 135 [2019-12-07 11:10:22,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694249018] [2019-12-07 11:10:22,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 137 states [2019-12-07 11:10:22,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:10:22,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2019-12-07 11:10:22,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2060, Invalid=19992, Unknown=0, NotChecked=0, Total=22052 [2019-12-07 11:10:22,550 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 137 states. [2019-12-07 11:10:34,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:10:34,835 INFO L93 Difference]: Finished difference Result 193 states and 195 transitions. [2019-12-07 11:10:34,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-12-07 11:10:34,835 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 178 [2019-12-07 11:10:34,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:10:34,836 INFO L225 Difference]: With dead ends: 193 [2019-12-07 11:10:34,836 INFO L226 Difference]: Without dead ends: 191 [2019-12-07 11:10:34,837 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8481 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=4084, Invalid=25672, Unknown=0, NotChecked=0, Total=29756 [2019-12-07 11:10:34,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-07 11:10:34,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2019-12-07 11:10:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-12-07 11:10:34,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2019-12-07 11:10:34,839 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 178 [2019-12-07 11:10:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:10:34,839 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2019-12-07 11:10:34,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 137 states. [2019-12-07 11:10:34,839 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2019-12-07 11:10:34,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-12-07 11:10:34,840 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:10:34,840 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:10:35,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:10:35,041 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:10:35,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:10:35,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1435047891, now seen corresponding path program 40 times [2019-12-07 11:10:35,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:10:35,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432389345] [2019-12-07 11:10:35,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:10:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:10:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1894 backedges. 108 proven. 1785 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:10:36,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432389345] [2019-12-07 11:10:36,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913130666] [2019-12-07 11:10:36,148 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:10:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:10:36,294 INFO L264 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 148 conjunts are in the unsatisfiable core [2019-12-07 11:10:36,296 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:10:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1894 backedges. 108 proven. 1785 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:10:41,808 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:10:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1894 backedges. 108 proven. 1785 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:10:46,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [211549850] [2019-12-07 11:10:46,264 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:10:46,265 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:10:46,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:10:46,265 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:10:46,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:10:46,639 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:10:47,062 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:10:48,026 WARN L192 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2019-12-07 11:10:49,612 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:10:50,228 WARN L192 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:10:50,674 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:10:51,120 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:10:52,346 WARN L192 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:10:52,361 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:10:52,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:10:52,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 121 [2019-12-07 11:10:52,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171907983] [2019-12-07 11:10:52,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 122 states [2019-12-07 11:10:52,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:10:52,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2019-12-07 11:10:52,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=17334, Unknown=0, NotChecked=0, Total=17822 [2019-12-07 11:10:52,366 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand 122 states. [2019-12-07 11:11:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:11:07,353 INFO L93 Difference]: Finished difference Result 323 states and 325 transitions. [2019-12-07 11:11:07,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-12-07 11:11:07,353 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 184 [2019-12-07 11:11:07,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:11:07,354 INFO L225 Difference]: With dead ends: 323 [2019-12-07 11:11:07,354 INFO L226 Difference]: Without dead ends: 191 [2019-12-07 11:11:07,354 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 467 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8374 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=1017, Invalid=31563, Unknown=0, NotChecked=0, Total=32580 [2019-12-07 11:11:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-07 11:11:07,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2019-12-07 11:11:07,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-12-07 11:11:07,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2019-12-07 11:11:07,356 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 184 [2019-12-07 11:11:07,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:11:07,356 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2019-12-07 11:11:07,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 122 states. [2019-12-07 11:11:07,356 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2019-12-07 11:11:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-12-07 11:11:07,357 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:11:07,357 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:11:07,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:11:07,558 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 11:11:07,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:11:07,559 INFO L82 PathProgramCache]: Analyzing trace with hash 51157915, now seen corresponding path program 41 times [2019-12-07 11:11:07,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:11:07,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723302254] [2019-12-07 11:11:07,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:11:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:11:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1937 backedges. 400 proven. 1536 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:11:08,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723302254] [2019-12-07 11:11:08,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096145813] [2019-12-07 11:11:08,552 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:11:09,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2019-12-07 11:11:09,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:11:09,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 67 conjunts are in the unsatisfiable core [2019-12-07 11:11:09,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:11:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1937 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2019-12-07 11:11:09,595 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:11:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1937 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2019-12-07 11:11:10,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1852111749] [2019-12-07 11:11:10,099 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 11:11:10,099 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:11:10,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:11:10,099 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:11:10,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:11:10,318 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:11:10,323 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:11:10,530 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:11:10,830 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-12-07 11:11:11,522 WARN L192 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2019-12-07 11:11:12,211 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-12-07 11:11:12,597 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2019-12-07 11:11:13,071 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-12-07 11:11:13,619 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 11:11:14,027 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-12-07 11:11:14,591 WARN L192 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-12-07 11:11:15,618 WARN L192 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-12-07 11:11:16,021 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2019-12-07 11:11:16,025 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:11:16,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:11:16,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 5, 5] total 57 [2019-12-07 11:11:16,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354655393] [2019-12-07 11:11:16,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-12-07 11:11:16,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:11:16,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-12-07 11:11:16,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=4456, Unknown=0, NotChecked=0, Total=4970 [2019-12-07 11:11:16,026 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 59 states. [2019-12-07 11:11:20,437 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2019-12-07 11:11:20,870 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2019-12-07 11:11:20,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:11:20,952 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2019-12-07 11:11:20,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-12-07 11:11:20,954 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 186 [2019-12-07 11:11:20,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:11:20,954 INFO L225 Difference]: With dead ends: 191 [2019-12-07 11:11:20,955 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 11:11:20,956 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2557, Invalid=11249, Unknown=0, NotChecked=0, Total=13806 [2019-12-07 11:11:20,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 11:11:20,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 11:11:20,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 11:11:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 11:11:20,957 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 186 [2019-12-07 11:11:20,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:11:20,958 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 11:11:20,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-12-07 11:11:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 11:11:20,958 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 11:11:21,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:11:21,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 11:11:21 BoogieIcfgContainer [2019-12-07 11:11:21,171 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 11:11:21,172 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 11:11:21,172 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 11:11:21,172 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 11:11:21,173 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:01:48" (3/4) ... [2019-12-07 11:11:21,181 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 11:11:21,190 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2019-12-07 11:11:21,190 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2019-12-07 11:11:21,190 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 11:11:21,222 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7277e692-44d0-4597-b1bc-e13fe905e8bb/bin/utaipan/witness.graphml [2019-12-07 11:11:21,222 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 11:11:21,223 INFO L168 Benchmark]: Toolchain (without parser) took 573552.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.0 MB). Free memory was 943.5 MB in the beginning and 979.8 MB in the end (delta: -36.3 MB). Peak memory consumption was 124.7 MB. Max. memory is 11.5 GB. [2019-12-07 11:11:21,223 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:11:21,223 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -169.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-12-07 11:11:21,223 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:11:21,223 INFO L168 Benchmark]: Boogie Preprocessor took 19.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 11:11:21,223 INFO L168 Benchmark]: RCFGBuilder took 350.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 44.4 MB). Peak memory consumption was 44.4 MB. Max. memory is 11.5 GB. [2019-12-07 11:11:21,223 INFO L168 Benchmark]: TraceAbstraction took 572798.39 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 31.5 MB). Free memory was 1.1 GB in the beginning and 981.9 MB in the end (delta: 80.7 MB). Peak memory consumption was 112.2 MB. Max. memory is 11.5 GB. [2019-12-07 11:11:21,223 INFO L168 Benchmark]: Witness Printer took 50.10 ms. Allocated memory is still 1.2 GB. Free memory was 981.9 MB in the beginning and 979.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 11.5 GB. [2019-12-07 11:11:21,224 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 301.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -169.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 350.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 44.4 MB). Peak memory consumption was 44.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 572798.39 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 31.5 MB). Free memory was 1.1 GB in the beginning and 981.9 MB in the end (delta: 80.7 MB). Peak memory consumption was 112.2 MB. Max. memory is 11.5 GB. * Witness Printer took 50.10 ms. Allocated memory is still 1.2 GB. Free memory was 981.9 MB in the beginning and 979.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 550]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 550]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 19 error locations. Result: SAFE, OverallTime: 572.7s, OverallIterations: 59, TraceHistogramMax: 23, AutomataDifference: 226.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1513 SDtfs, 44887 SDslu, 35544 SDs, 0 SdLazy, 107466 SolverSat, 8865 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 96.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15297 GetRequests, 10758 SyntacticMatches, 185 SemanticMatches, 4354 ConstructedPredicates, 0 IntricatePredicates, 47 DeprecatedPredicates, 123618 ImplicationChecksByTransitivity, 407.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=190occurred in iteration=58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 59 MinimizatonAttempts, 346 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 9.7s SatisfiabilityAnalysisTime, 133.8s InterpolantComputationTime, 8718 NumberOfCodeBlocks, 8718 NumberOfCodeBlocksAsserted, 291 NumberOfCheckSat, 12884 ConstructedInterpolants, 989 QuantifiedInterpolants, 18427047 SizeOfPredicates, 658 NumberOfNonLiveVariables, 24113 ConjunctsInSsa, 3311 ConjunctsInUnsatCore, 151 InterpolantComputations, 13 PerfectInterpolantSequences, 16916/87074 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 273, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 12, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 20, TOOLS_POST_TIME[ms]: 196, 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: 20, TOOLS_QUANTIFIERELIM_TIME[ms]: 192, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 95, FLUID_QUERY_TIME[ms]: 1, FLUID_QUERIES: 38, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME[ms]: 27, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 19, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME[ms]: 3, DOMAIN_ISBOTTOM_APPLICATIONS: 12, DOMAIN_ISBOTTOM_TIME[ms]: 18, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 68, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 68, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 0, PATH_EXPR_TIME[ms]: 0, REGEX_TO_DAG_TIME[ms]: 1, DAG_COMPRESSION_TIME[ms]: 5, DAG_COMPRESSION_PROCESSED_NODES: 286, DAG_COMPRESSION_RETAINED_NODES: 40, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...