./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/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 e872a0dffbf376eb2d8b1e3516401a8dafe115a6 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 20:38:35,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:38:35,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:38:35,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:38:35,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:38:35,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:38:35,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:38:35,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:38:35,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:38:35,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:38:35,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:38:35,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:38:35,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:38:35,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:38:35,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:38:35,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:38:35,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:38:35,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:38:35,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:38:35,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:38:35,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:38:35,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:38:35,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:38:35,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:38:35,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:38:35,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:38:35,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:38:35,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:38:35,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:38:35,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:38:35,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:38:35,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:38:35,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:38:35,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:38:35,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:38:35,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:38:35,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:38:35,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:38:35,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:38:35,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:38:35,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:38:35,893 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 20:38:35,911 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:38:35,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:38:35,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:38:35,912 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:38:35,912 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:38:35,912 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:38:35,912 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 20:38:35,912 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:38:35,913 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:38:35,913 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 20:38:35,913 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 20:38:35,913 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:38:35,913 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 20:38:35,913 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 20:38:35,913 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 20:38:35,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 20:38:35,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 20:38:35,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:38:35,914 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 20:38:35,914 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 20:38:35,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 20:38:35,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 20:38:35,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:38:35,915 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 20:38:35,915 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 20:38:35,915 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 20:38:35,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:38:35,915 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 20:38:35,915 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 20:38:35,916 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:38:35,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:38:35,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:38:35,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:38:35,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:38:35,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:38:35,916 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 20:38:35,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 20:38:35,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:38:35,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:38:35,917 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e872a0dffbf376eb2d8b1e3516401a8dafe115a6 [2020-12-09 20:38:36,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:38:36,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:38:36,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:38:36,107 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:38:36,107 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:38:36,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2020-12-09 20:38:36,150 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan/data/b0611720a/1f4da180ea264745a84cc058ebb414ac/FLAG8ad0867b0 [2020-12-09 20:38:36,512 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:38:36,512 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2020-12-09 20:38:36,516 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan/data/b0611720a/1f4da180ea264745a84cc058ebb414ac/FLAG8ad0867b0 [2020-12-09 20:38:36,526 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan/data/b0611720a/1f4da180ea264745a84cc058ebb414ac [2020-12-09 20:38:36,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:38:36,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:38:36,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:38:36,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:38:36,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:38:36,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:38:36" (1/1) ... [2020-12-09 20:38:36,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24420774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:38:36, skipping insertion in model container [2020-12-09 20:38:36,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:38:36" (1/1) ... [2020-12-09 20:38:36,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:38:36,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:38:36,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:38:36,675 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:38:36,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:38:36,697 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:38:36,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:38:36 WrapperNode [2020-12-09 20:38:36,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:38:36,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:38:36,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:38:36,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:38:36,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:38:36" (1/1) ... [2020-12-09 20:38:36,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:38:36" (1/1) ... [2020-12-09 20:38:36,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:38:36,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:38:36,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:38:36,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:38:36,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:38:36" (1/1) ... [2020-12-09 20:38:36,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:38:36" (1/1) ... [2020-12-09 20:38:36,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:38:36" (1/1) ... [2020-12-09 20:38:36,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:38:36" (1/1) ... [2020-12-09 20:38:36,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:38:36" (1/1) ... [2020-12-09 20:38:36,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:38:36" (1/1) ... [2020-12-09 20:38:36,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:38:36" (1/1) ... [2020-12-09 20:38:36,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:38:36,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:38:36,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:38:36,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:38:36,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:38:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:38:36,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 20:38:36,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:38:36,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:38:36,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 20:38:36,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:38:36,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 20:38:37,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:38:37,039 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 20:38:37,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:38:37 BoogieIcfgContainer [2020-12-09 20:38:37,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:38:37,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:38:37,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:38:37,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:38:37,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:38:36" (1/3) ... [2020-12-09 20:38:37,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368b0586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:38:37, skipping insertion in model container [2020-12-09 20:38:37,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:38:36" (2/3) ... [2020-12-09 20:38:37,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368b0586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:38:37, skipping insertion in model container [2020-12-09 20:38:37,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:38:37" (3/3) ... [2020-12-09 20:38:37,047 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers2.c [2020-12-09 20:38:37,057 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:38:37,060 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2020-12-09 20:38:37,067 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-12-09 20:38:37,082 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:38:37,082 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 20:38:37,083 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:38:37,083 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:38:37,083 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:38:37,083 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:38:37,083 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:38:37,083 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:38:37,092 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-09 20:38:37,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 20:38:37,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:37,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 20:38:37,097 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:37,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:37,101 INFO L82 PathProgramCache]: Analyzing trace with hash 81046, now seen corresponding path program 1 times [2020-12-09 20:38:37,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:37,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713709094] [2020-12-09 20:38:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:38:37,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713709094] [2020-12-09 20:38:37,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:38:37,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 20:38:37,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264901545] [2020-12-09 20:38:37,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:38:37,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:37,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:38:37,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:38:37,228 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-12-09 20:38:37,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:37,258 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2020-12-09 20:38:37,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:38:37,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 20:38:37,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:37,265 INFO L225 Difference]: With dead ends: 17 [2020-12-09 20:38:37,265 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 20:38:37,266 INFO L677 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 [2020-12-09 20:38:37,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 20:38:37,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 20:38:37,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 20:38:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-09 20:38:37,292 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 3 [2020-12-09 20:38:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:37,292 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-09 20:38:37,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:38:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-09 20:38:37,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 20:38:37,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:37,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 20:38:37,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 20:38:37,293 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:37,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:37,294 INFO L82 PathProgramCache]: Analyzing trace with hash 81047, now seen corresponding path program 1 times [2020-12-09 20:38:37,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:37,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447170069] [2020-12-09 20:38:37,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:38:37,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447170069] [2020-12-09 20:38:37,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:38:37,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 20:38:37,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685709806] [2020-12-09 20:38:37,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:38:37,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:37,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:38:37,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:38:37,329 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 3 states. [2020-12-09 20:38:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:37,346 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2020-12-09 20:38:37,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:38:37,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 20:38:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:37,347 INFO L225 Difference]: With dead ends: 18 [2020-12-09 20:38:37,347 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 20:38:37,348 INFO L677 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 [2020-12-09 20:38:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 20:38:37,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-09 20:38:37,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 20:38:37,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-09 20:38:37,351 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 3 [2020-12-09 20:38:37,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:37,351 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-09 20:38:37,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:38:37,351 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-09 20:38:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 20:38:37,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:37,351 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-12-09 20:38:37,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 20:38:37,352 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:37,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:37,352 INFO L82 PathProgramCache]: Analyzing trace with hash 77927813, now seen corresponding path program 1 times [2020-12-09 20:38:37,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:37,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618777721] [2020-12-09 20:38:37,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:38:37,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618777721] [2020-12-09 20:38:37,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601640161] [2020-12-09 20:38:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:38:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:37,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 20:38:37,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:38:37,463 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-09 20:38:37,464 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:38:37,469 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:38:37,470 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:38:37,470 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-09 20:38:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:38:37,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:38:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:38:37,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744790577] [2020-12-09 20:38:37,527 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-12-09 20:38:37,527 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:38:37,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:38:37,534 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:38:37,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:38:37,795 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:38:37,888 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:38:37,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:38:37,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-09 20:38:37,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678675741] [2020-12-09 20:38:37,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 20:38:37,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:37,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 20:38:37,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-09 20:38:37,891 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-12-09 20:38:37,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:37,955 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-09 20:38:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:38:37,955 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 20:38:37,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:37,957 INFO L225 Difference]: With dead ends: 24 [2020-12-09 20:38:37,957 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 20:38:37,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-09 20:38:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 20:38:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-09 20:38:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 20:38:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-09 20:38:37,962 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 5 [2020-12-09 20:38:37,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:37,962 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-09 20:38:37,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 20:38:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-09 20:38:37,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 20:38:37,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:37,963 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-12-09 20:38:38,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 20:38:38,165 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:38,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2028487428, now seen corresponding path program 1 times [2020-12-09 20:38:38,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:38,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320935644] [2020-12-09 20:38:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 20:38:38,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320935644] [2020-12-09 20:38:38,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:38:38,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:38:38,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676023880] [2020-12-09 20:38:38,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:38:38,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:38,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:38:38,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:38:38,265 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 3 states. [2020-12-09 20:38:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:38,334 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-12-09 20:38:38,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:38:38,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-09 20:38:38,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:38,338 INFO L225 Difference]: With dead ends: 31 [2020-12-09 20:38:38,338 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 20:38:38,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:38:38,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 20:38:38,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-12-09 20:38:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 20:38:38,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-09 20:38:38,348 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 8 [2020-12-09 20:38:38,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:38,348 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-09 20:38:38,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:38:38,349 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-09 20:38:38,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 20:38:38,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:38,350 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-12-09 20:38:38,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-09 20:38:38,350 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:38,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:38,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2028488527, now seen corresponding path program 1 times [2020-12-09 20:38:38,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:38,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975790415] [2020-12-09 20:38:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:38:38,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975790415] [2020-12-09 20:38:38,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581944586] [2020-12-09 20:38:38,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:38:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:38,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 20:38:38,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:38:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:38:38,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:38:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:38:38,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2097546755] [2020-12-09 20:38:38,466 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 20:38:38,466 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:38:38,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:38:38,467 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:38:38,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:38:38,625 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:38:38,818 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:38:38,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:38:38,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2020-12-09 20:38:38,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73692100] [2020-12-09 20:38:38,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 20:38:38,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:38,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 20:38:38,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-12-09 20:38:38,821 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 9 states. [2020-12-09 20:38:38,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:38,849 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-12-09 20:38:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 20:38:38,849 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2020-12-09 20:38:38,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:38,850 INFO L225 Difference]: With dead ends: 29 [2020-12-09 20:38:38,850 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 20:38:38,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-12-09 20:38:38,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 20:38:38,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-09 20:38:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 20:38:38,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-09 20:38:38,853 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 8 [2020-12-09 20:38:38,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:38,853 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-09 20:38:38,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 20:38:38,853 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-09 20:38:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 20:38:38,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:38,854 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2020-12-09 20:38:39,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:38:39,056 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:39,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:39,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1976235185, now seen corresponding path program 2 times [2020-12-09 20:38:39,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:39,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551337320] [2020-12-09 20:38:39,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:38:39,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551337320] [2020-12-09 20:38:39,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820868850] [2020-12-09 20:38:39,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:38:39,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 20:38:39,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:38:39,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 20:38:39,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:38:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 20:38:39,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:38:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 20:38:39,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 20:38:39,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 12 [2020-12-09 20:38:39,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861168401] [2020-12-09 20:38:39,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:38:39,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:39,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:38:39,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-09 20:38:39,404 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2020-12-09 20:38:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:39,426 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-12-09 20:38:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:38:39,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 20:38:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:39,427 INFO L225 Difference]: With dead ends: 27 [2020-12-09 20:38:39,427 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 20:38:39,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-09 20:38:39,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 20:38:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-09 20:38:39,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 20:38:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-09 20:38:39,430 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 11 [2020-12-09 20:38:39,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:39,431 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-09 20:38:39,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:38:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-09 20:38:39,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 20:38:39,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:39,431 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2020-12-09 20:38:39,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-09 20:38:39,632 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:39,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:39,633 INFO L82 PathProgramCache]: Analyzing trace with hash 621829369, now seen corresponding path program 2 times [2020-12-09 20:38:39,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:39,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238433217] [2020-12-09 20:38:39,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:38:39,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238433217] [2020-12-09 20:38:39,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616303458] [2020-12-09 20:38:39,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/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 [2020-12-09 20:38:39,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 20:38:39,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:38:39,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 20:38:39,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:38:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 20:38:39,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:38:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 20:38:39,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 20:38:39,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [8] total 12 [2020-12-09 20:38:39,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333636862] [2020-12-09 20:38:39,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 20:38:39,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:39,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 20:38:39,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-12-09 20:38:39,962 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 6 states. [2020-12-09 20:38:40,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:40,024 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-09 20:38:40,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:38:40,024 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-09 20:38:40,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:40,025 INFO L225 Difference]: With dead ends: 40 [2020-12-09 20:38:40,025 INFO L226 Difference]: Without dead ends: 40 [2020-12-09 20:38:40,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-12-09 20:38:40,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-09 20:38:40,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2020-12-09 20:38:40,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 20:38:40,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-12-09 20:38:40,028 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2020-12-09 20:38:40,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:40,028 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-12-09 20:38:40,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 20:38:40,028 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-12-09 20:38:40,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 20:38:40,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:40,028 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2020-12-09 20:38:40,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:38:40,230 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:40,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:40,231 INFO L82 PathProgramCache]: Analyzing trace with hash 621829368, now seen corresponding path program 1 times [2020-12-09 20:38:40,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:40,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28985894] [2020-12-09 20:38:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:38:40,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28985894] [2020-12-09 20:38:40,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524330017] [2020-12-09 20:38:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/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 [2020-12-09 20:38:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:40,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 20:38:40,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:38:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:38:40,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:38:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:38:40,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [836287255] [2020-12-09 20:38:40,519 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 20:38:40,519 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:38:40,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:38:40,520 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:38:40,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:38:40,700 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:38:40,902 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:38:40,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:38:40,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2020-12-09 20:38:40,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754455566] [2020-12-09 20:38:40,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 20:38:40,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:40,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 20:38:40,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-09 20:38:40,904 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 13 states. [2020-12-09 20:38:40,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:40,938 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-12-09 20:38:40,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 20:38:40,939 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-12-09 20:38:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:40,940 INFO L225 Difference]: With dead ends: 39 [2020-12-09 20:38:40,940 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 20:38:40,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-09 20:38:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 20:38:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-09 20:38:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-09 20:38:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-12-09 20:38:40,944 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 16 [2020-12-09 20:38:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:40,944 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-12-09 20:38:40,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 20:38:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-12-09 20:38:40,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 20:38:40,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:40,945 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1] [2020-12-09 20:38:41,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-09 20:38:41,147 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:41,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:41,148 INFO L82 PathProgramCache]: Analyzing trace with hash -714852032, now seen corresponding path program 2 times [2020-12-09 20:38:41,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:41,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516811111] [2020-12-09 20:38:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 20:38:41,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516811111] [2020-12-09 20:38:41,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:38:41,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:38:41,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258348955] [2020-12-09 20:38:41,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:38:41,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:41,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:38:41,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:38:41,232 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 4 states. [2020-12-09 20:38:41,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:41,253 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-12-09 20:38:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:38:41,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-12-09 20:38:41,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:41,255 INFO L225 Difference]: With dead ends: 38 [2020-12-09 20:38:41,255 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 20:38:41,255 INFO L677 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 [2020-12-09 20:38:41,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 20:38:41,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-09 20:38:41,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-09 20:38:41,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-12-09 20:38:41,259 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 24 [2020-12-09 20:38:41,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:41,259 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-12-09 20:38:41,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:38:41,259 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-12-09 20:38:41,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 20:38:41,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:41,260 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2020-12-09 20:38:41,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-12-09 20:38:41,261 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:41,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:41,261 INFO L82 PathProgramCache]: Analyzing trace with hash -685576509, now seen corresponding path program 1 times [2020-12-09 20:38:41,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:41,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389266941] [2020-12-09 20:38:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 20:38:41,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389266941] [2020-12-09 20:38:41,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:38:41,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:38:41,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469086425] [2020-12-09 20:38:41,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:38:41,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:41,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:38:41,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:38:41,285 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 3 states. [2020-12-09 20:38:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:41,296 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-12-09 20:38:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:38:41,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-09 20:38:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:41,297 INFO L225 Difference]: With dead ends: 37 [2020-12-09 20:38:41,297 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 20:38:41,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:38:41,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 20:38:41,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-09 20:38:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-09 20:38:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-12-09 20:38:41,299 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 25 [2020-12-09 20:38:41,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:41,300 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-12-09 20:38:41,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:38:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-12-09 20:38:41,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 20:38:41,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:41,300 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2020-12-09 20:38:41,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-12-09 20:38:41,301 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:41,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:41,301 INFO L82 PathProgramCache]: Analyzing trace with hash -685576508, now seen corresponding path program 1 times [2020-12-09 20:38:41,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:41,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923122317] [2020-12-09 20:38:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 20:38:41,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923122317] [2020-12-09 20:38:41,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:38:41,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:38:41,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681228293] [2020-12-09 20:38:41,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:38:41,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:41,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:38:41,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:38:41,329 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 3 states. [2020-12-09 20:38:41,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:41,343 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-12-09 20:38:41,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:38:41,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-09 20:38:41,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:41,344 INFO L225 Difference]: With dead ends: 37 [2020-12-09 20:38:41,344 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 20:38:41,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:38:41,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 20:38:41,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-09 20:38:41,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-09 20:38:41,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-12-09 20:38:41,347 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 25 [2020-12-09 20:38:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:41,347 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-12-09 20:38:41,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:38:41,347 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-12-09 20:38:41,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 20:38:41,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:41,348 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:38:41,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-12-09 20:38:41,348 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:41,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:41,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1709004728, now seen corresponding path program 1 times [2020-12-09 20:38:41,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:41,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121200760] [2020-12-09 20:38:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 20:38:41,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121200760] [2020-12-09 20:38:41,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839551150] [2020-12-09 20:38:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/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 [2020-12-09 20:38:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:41,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 20:38:41,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:38:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 20:38:41,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:38:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 20:38:41,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [418124930] [2020-12-09 20:38:41,453 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 20:38:41,453 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:38:41,453 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:38:41,453 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:38:41,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:38:41,738 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:38:42,046 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:38:42,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:38:42,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2020-12-09 20:38:42,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834487166] [2020-12-09 20:38:42,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 20:38:42,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:42,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 20:38:42,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-12-09 20:38:42,047 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 7 states. [2020-12-09 20:38:42,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:42,071 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-12-09 20:38:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:38:42,072 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-12-09 20:38:42,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:42,072 INFO L225 Difference]: With dead ends: 45 [2020-12-09 20:38:42,072 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 20:38:42,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-12-09 20:38:42,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 20:38:42,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-12-09 20:38:42,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-09 20:38:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-09 20:38:42,075 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 27 [2020-12-09 20:38:42,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:42,075 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-09 20:38:42,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 20:38:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-09 20:38:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 20:38:42,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:42,076 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1] [2020-12-09 20:38:42,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:38:42,278 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:42,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:42,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1439573112, now seen corresponding path program 1 times [2020-12-09 20:38:42,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:42,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185211470] [2020-12-09 20:38:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 20:38:42,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185211470] [2020-12-09 20:38:42,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835469665] [2020-12-09 20:38:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/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 [2020-12-09 20:38:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:42,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 20:38:42,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:38:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 20:38:42,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:38:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 20:38:42,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [117181930] [2020-12-09 20:38:42,437 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 20:38:42,437 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:38:42,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:38:42,437 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:38:42,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:38:42,652 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:38:42,992 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:38:42,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:38:42,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-12-09 20:38:42,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966915406] [2020-12-09 20:38:42,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 20:38:42,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:42,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 20:38:42,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-12-09 20:38:42,994 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 6 states. [2020-12-09 20:38:43,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:43,036 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-09 20:38:43,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:38:43,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-12-09 20:38:43,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:43,037 INFO L225 Difference]: With dead ends: 46 [2020-12-09 20:38:43,037 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 20:38:43,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-12-09 20:38:43,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 20:38:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-12-09 20:38:43,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 20:38:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-12-09 20:38:43,040 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 28 [2020-12-09 20:38:43,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:43,040 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-12-09 20:38:43,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 20:38:43,040 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-12-09 20:38:43,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 20:38:43,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:43,041 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 1, 1, 1] [2020-12-09 20:38:43,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:38:43,242 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:43,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:43,244 INFO L82 PathProgramCache]: Analyzing trace with hash -450269247, now seen corresponding path program 1 times [2020-12-09 20:38:43,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:43,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364251796] [2020-12-09 20:38:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-09 20:38:43,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364251796] [2020-12-09 20:38:43,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213086107] [2020-12-09 20:38:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/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 [2020-12-09 20:38:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:43,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-09 20:38:43,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:38:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 90 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:38:43,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:38:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 100 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:38:44,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [454206150] [2020-12-09 20:38:44,133 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 20:38:44,133 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:38:44,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:38:44,134 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:38:44,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:38:44,355 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:38:44,743 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:38:44,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:38:44,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 14] total 29 [2020-12-09 20:38:44,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212799088] [2020-12-09 20:38:44,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-09 20:38:44,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:44,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-09 20:38:44,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=965, Unknown=0, NotChecked=0, Total=1332 [2020-12-09 20:38:44,744 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 31 states. [2020-12-09 20:38:45,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:45,294 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-12-09 20:38:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-09 20:38:45,294 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2020-12-09 20:38:45,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:45,295 INFO L225 Difference]: With dead ends: 60 [2020-12-09 20:38:45,295 INFO L226 Difference]: Without dead ends: 60 [2020-12-09 20:38:45,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=953, Invalid=2127, Unknown=0, NotChecked=0, Total=3080 [2020-12-09 20:38:45,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-09 20:38:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2020-12-09 20:38:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 20:38:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-12-09 20:38:45,299 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 30 [2020-12-09 20:38:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:45,300 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-12-09 20:38:45,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-09 20:38:45,300 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-12-09 20:38:45,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-09 20:38:45,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:45,301 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1] [2020-12-09 20:38:45,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2020-12-09 20:38:45,503 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:45,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:45,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1355532940, now seen corresponding path program 2 times [2020-12-09 20:38:45,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:45,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097567681] [2020-12-09 20:38:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 20:38:45,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097567681] [2020-12-09 20:38:45,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957689066] [2020-12-09 20:38:45,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/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 [2020-12-09 20:38:45,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-09 20:38:45,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:38:45,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 20:38:45,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:38:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 20:38:45,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:38:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 20:38:45,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [126079939] [2020-12-09 20:38:45,704 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 20:38:45,704 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:38:45,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:38:45,705 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:38:45,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:38:45,933 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:38:46,234 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:38:46,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:38:46,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2020-12-09 20:38:46,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262300959] [2020-12-09 20:38:46,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 20:38:46,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:46,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 20:38:46,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-12-09 20:38:46,236 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 13 states. [2020-12-09 20:38:46,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:46,280 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-12-09 20:38:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 20:38:46,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-12-09 20:38:46,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:46,281 INFO L225 Difference]: With dead ends: 68 [2020-12-09 20:38:46,281 INFO L226 Difference]: Without dead ends: 68 [2020-12-09 20:38:46,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-12-09 20:38:46,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-09 20:38:46,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2020-12-09 20:38:46,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-09 20:38:46,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-12-09 20:38:46,284 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 36 [2020-12-09 20:38:46,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:46,284 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-12-09 20:38:46,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 20:38:46,285 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-12-09 20:38:46,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-09 20:38:46,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:46,285 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 4, 1, 1, 1] [2020-12-09 20:38:46,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-12-09 20:38:46,487 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:46,488 INFO L82 PathProgramCache]: Analyzing trace with hash -928185916, now seen corresponding path program 2 times [2020-12-09 20:38:46,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:46,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086415553] [2020-12-09 20:38:46,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-12-09 20:38:46,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086415553] [2020-12-09 20:38:46,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75174707] [2020-12-09 20:38:46,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/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 [2020-12-09 20:38:46,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 20:38:46,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:38:46,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 20:38:46,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:38:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-12-09 20:38:46,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:38:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-12-09 20:38:46,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1736964852] [2020-12-09 20:38:46,731 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 20:38:46,731 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:38:46,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:38:46,731 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:38:46,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:38:46,946 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:38:47,278 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:38:47,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:38:47,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2020-12-09 20:38:47,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332179131] [2020-12-09 20:38:47,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 20:38:47,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:47,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 20:38:47,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-12-09 20:38:47,279 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 13 states. [2020-12-09 20:38:47,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:47,327 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-12-09 20:38:47,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:38:47,328 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-12-09 20:38:47,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:47,328 INFO L225 Difference]: With dead ends: 59 [2020-12-09 20:38:47,328 INFO L226 Difference]: Without dead ends: 59 [2020-12-09 20:38:47,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2020-12-09 20:38:47,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-09 20:38:47,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-09 20:38:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-09 20:38:47,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-12-09 20:38:47,331 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 37 [2020-12-09 20:38:47,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:47,331 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-12-09 20:38:47,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 20:38:47,332 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-12-09 20:38:47,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-09 20:38:47,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:47,332 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 6, 6, 1, 1, 1] [2020-12-09 20:38:47,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:38:47,534 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:47,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:47,535 INFO L82 PathProgramCache]: Analyzing trace with hash -973914943, now seen corresponding path program 2 times [2020-12-09 20:38:47,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:47,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131247536] [2020-12-09 20:38:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:38:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 19 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-09 20:38:47,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131247536] [2020-12-09 20:38:47,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239526884] [2020-12-09 20:38:47,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/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 [2020-12-09 20:38:47,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 20:38:47,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:38:47,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 20:38:47,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:38:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-09 20:38:47,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:38:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-09 20:38:52,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 20:38:52,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 19 [2020-12-09 20:38:52,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096325906] [2020-12-09 20:38:52,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 20:38:52,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:38:52,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 20:38:52,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2020-12-09 20:38:52,321 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 7 states. [2020-12-09 20:38:52,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:38:52,414 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-09 20:38:52,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 20:38:52,415 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-12-09 20:38:52,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:38:52,415 INFO L225 Difference]: With dead ends: 58 [2020-12-09 20:38:52,416 INFO L226 Difference]: Without dead ends: 58 [2020-12-09 20:38:52,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2020-12-09 20:38:52,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-09 20:38:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-09 20:38:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 20:38:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-12-09 20:38:52,419 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 42 [2020-12-09 20:38:52,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:38:52,419 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-12-09 20:38:52,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 20:38:52,420 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-12-09 20:38:52,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-09 20:38:52,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:38:52,421 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1] [2020-12-09 20:38:52,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-12-09 20:38:52,621 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 20:38:52,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:38:52,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1385066996, now seen corresponding path program 3 times [2020-12-09 20:38:52,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:38:52,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362888596] [2020-12-09 20:38:52,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:38:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:38:52,660 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:38:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:38:52,718 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:38:52,736 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 20:38:52,736 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 20:38:52,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2020-12-09 20:38:52,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:38:52 BoogieIcfgContainer [2020-12-09 20:38:52,771 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 20:38:52,772 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 20:38:52,772 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 20:38:52,772 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 20:38:52,772 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:38:37" (3/4) ... [2020-12-09 20:38:52,774 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 20:38:52,812 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_84c89da3-1805-446e-a5a6-c10246301919/bin/utaipan/witness.graphml [2020-12-09 20:38:52,812 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 20:38:52,813 INFO L168 Benchmark]: Toolchain (without parser) took 16282.88 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 70.0 MB in the beginning and 75.7 MB in the end (delta: -5.7 MB). Peak memory consumption was 44.2 MB. Max. memory is 16.1 GB. [2020-12-09 20:38:52,813 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 107.0 MB. Free memory was 86.1 MB in the beginning and 86.0 MB in the end (delta: 79.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:38:52,813 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.77 ms. Allocated memory is still 107.0 MB. Free memory was 69.7 MB in the beginning and 83.6 MB in the end (delta: -13.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 20:38:52,813 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.23 ms. Allocated memory is still 107.0 MB. Free memory was 83.6 MB in the beginning and 82.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:38:52,814 INFO L168 Benchmark]: Boogie Preprocessor took 15.95 ms. Allocated memory is still 107.0 MB. Free memory was 82.1 MB in the beginning and 81.1 MB in the end (delta: 945.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:38:52,814 INFO L168 Benchmark]: RCFGBuilder took 299.62 ms. Allocated memory is still 107.0 MB. Free memory was 81.1 MB in the beginning and 59.8 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 20:38:52,814 INFO L168 Benchmark]: TraceAbstraction took 15730.12 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 59.0 MB in the beginning and 79.9 MB in the end (delta: -20.9 MB). Peak memory consumption was 32.0 MB. Max. memory is 16.1 GB. [2020-12-09 20:38:52,814 INFO L168 Benchmark]: Witness Printer took 40.33 ms. Allocated memory is still 157.3 MB. Free memory was 79.9 MB in the beginning and 75.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:38:52,816 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 107.0 MB. Free memory was 86.1 MB in the beginning and 86.0 MB in the end (delta: 79.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 166.77 ms. Allocated memory is still 107.0 MB. Free memory was 69.7 MB in the beginning and 83.6 MB in the end (delta: -13.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.23 ms. Allocated memory is still 107.0 MB. Free memory was 83.6 MB in the beginning and 82.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.95 ms. Allocated memory is still 107.0 MB. Free memory was 82.1 MB in the beginning and 81.1 MB in the end (delta: 945.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 299.62 ms. Allocated memory is still 107.0 MB. Free memory was 81.1 MB in the beginning and 59.8 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15730.12 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 59.0 MB in the beginning and 79.9 MB in the end (delta: -20.9 MB). Peak memory consumption was 32.0 MB. Max. memory is 16.1 GB. * Witness Printer took 40.33 ms. Allocated memory is still 157.3 MB. Free memory was 79.9 MB in the beginning and 75.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1] int array[10]; [L5] int i = 0; VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND FALSE !(i < 10) [L9] return array; [L13] int* numbers = getNumbers(); [L15] int numbers2[10]; [L17] int i = 0; VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND FALSE !(i < 10) [L21] return numbers2; [L21] return numbers2; [L25] int *numbers = getNumbers2(); [L26] numbers[0] = 100 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 9 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.6s, OverallIterations: 18, TraceHistogramMax: 10, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 163 SDtfs, 367 SDslu, 182 SDs, 0 SdLazy, 664 SolverSat, 103 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 780 GetRequests, 568 SyntacticMatches, 9 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 8.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 17 MinimizatonAttempts, 40 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.0s InterpolantComputationTime, 654 NumberOfCodeBlocks, 559 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 817 ConstructedInterpolants, 55 QuantifiedInterpolants, 249082 SizeOfPredicates, 23 NumberOfNonLiveVariables, 918 ConjunctsInSsa, 109 ConjunctsInUnsatCore, 39 InterpolantComputations, 10 PerfectInterpolantSequences, 2381/2758 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...