./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.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_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/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 32d9f155778c5c4efaa55d37fdad329bb0d271b5 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:36:20,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:36:20,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:36:20,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:36:20,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:36:20,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:36:20,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:36:20,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:36:20,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:36:20,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:36:20,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:36:20,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:36:20,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:36:20,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:36:20,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:36:20,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:36:20,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:36:20,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:36:20,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:36:20,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:36:20,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:36:20,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:36:20,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:36:20,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:36:20,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:36:20,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:36:20,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:36:20,560 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:36:20,561 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:36:20,562 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:36:20,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:36:20,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:36:20,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:36:20,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:36:20,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:36:20,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:36:20,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:36:20,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:36:20,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:36:20,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:36:20,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:36:20,575 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-03 12:36:20,626 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:36:20,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:36:20,627 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:36:20,628 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:36:20,628 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:36:20,628 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:36:20,628 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:36:20,629 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:36:20,629 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:36:20,642 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:36:20,644 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:36:20,644 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:36:20,644 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:36:20,644 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:36:20,645 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:36:20,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 12:36:20,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 12:36:20,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:36:20,647 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:36:20,647 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:36:20,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:36:20,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:36:20,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:36:20,649 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-03 12:36:20,649 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-03 12:36:20,649 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-03 12:36:20,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:36:20,651 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:36:20,651 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:36:20,651 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:36:20,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:36:20,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:36:20,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:36:20,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:36:20,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:36:20,653 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:36:20,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:36:20,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:36:20,653 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:36:20,654 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_4e3630aa-9095-4287-8347-a4815e9e16d5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32d9f155778c5c4efaa55d37fdad329bb0d271b5 [2020-12-03 12:36:20,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:36:21,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:36:21,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:36:21,021 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:36:21,028 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:36:21,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2020-12-03 12:36:21,102 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan/data/273c617e5/e577a96cae1048a48096432a572c569e/FLAG238e839df [2020-12-03 12:36:21,571 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:36:21,571 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2020-12-03 12:36:21,589 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan/data/273c617e5/e577a96cae1048a48096432a572c569e/FLAG238e839df [2020-12-03 12:36:22,090 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan/data/273c617e5/e577a96cae1048a48096432a572c569e [2020-12-03 12:36:22,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:36:22,096 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:36:22,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:36:22,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:36:22,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:36:22,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59af61b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22, skipping insertion in model container [2020-12-03 12:36:22,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:36:22,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:36:22,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:36:22,311 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:36:22,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:36:22,340 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:36:22,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22 WrapperNode [2020-12-03 12:36:22,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:36:22,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:36:22,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:36:22,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:36:22,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:36:22,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:36:22,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:36:22,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:36:22,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:36:22,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:36:22,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:36:22,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:36:22,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:36:22,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-03 12:36:22,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:36:22,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:36:22,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-03 12:36:22,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:36:22,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-03 12:36:23,023 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:36:23,023 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-03 12:36:23,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:36:23 BoogieIcfgContainer [2020-12-03 12:36:23,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:36:23,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:36:23,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:36:23,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:36:23,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:36:22" (1/3) ... [2020-12-03 12:36:23,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d22f14a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:36:23, skipping insertion in model container [2020-12-03 12:36:23,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (2/3) ... [2020-12-03 12:36:23,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d22f14a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:36:23, skipping insertion in model container [2020-12-03 12:36:23,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:36:23" (3/3) ... [2020-12-03 12:36:23,036 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5.c [2020-12-03 12:36:23,050 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:36:23,053 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-03 12:36:23,062 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-03 12:36:23,082 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:36:23,082 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-03 12:36:23,082 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:36:23,082 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:36:23,083 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:36:23,083 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:36:23,083 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:36:23,083 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:36:23,096 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-03 12:36:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:36:23,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:23,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:36:23,104 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:23,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:23,110 INFO L82 PathProgramCache]: Analyzing trace with hash 3150815, now seen corresponding path program 1 times [2020-12-03 12:36:23,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:23,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799987808] [2020-12-03 12:36:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:23,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799987808] [2020-12-03 12:36:23,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:36:23,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:36:23,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435325749] [2020-12-03 12:36:23,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:36:23,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:23,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:36:23,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:36:23,312 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-12-03 12:36:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:23,366 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-12-03 12:36:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:36:23,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-03 12:36:23,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:23,376 INFO L225 Difference]: With dead ends: 37 [2020-12-03 12:36:23,376 INFO L226 Difference]: Without dead ends: 35 [2020-12-03 12:36:23,378 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 [2020-12-03 12:36:23,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-03 12:36:23,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2020-12-03 12:36:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-03 12:36:23,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-03 12:36:23,409 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-12-03 12:36:23,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:23,409 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-03 12:36:23,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:36:23,410 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-03 12:36:23,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:36:23,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:23,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:36:23,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:36:23,411 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:23,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:23,412 INFO L82 PathProgramCache]: Analyzing trace with hash 3078660, now seen corresponding path program 1 times [2020-12-03 12:36:23,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:23,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421508299] [2020-12-03 12:36:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:23,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421508299] [2020-12-03 12:36:23,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:36:23,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:36:23,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850761195] [2020-12-03 12:36:23,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:36:23,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:23,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:36:23,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:36:23,512 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-12-03 12:36:23,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:23,632 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-12-03 12:36:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:36:23,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-03 12:36:23,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:23,638 INFO L225 Difference]: With dead ends: 45 [2020-12-03 12:36:23,638 INFO L226 Difference]: Without dead ends: 45 [2020-12-03 12:36:23,640 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 [2020-12-03 12:36:23,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-03 12:36:23,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 21. [2020-12-03 12:36:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-03 12:36:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-03 12:36:23,648 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 4 [2020-12-03 12:36:23,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:23,649 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-03 12:36:23,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:36:23,650 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-03 12:36:23,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:36:23,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:23,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:36:23,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:36:23,651 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:23,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:23,653 INFO L82 PathProgramCache]: Analyzing trace with hash 3080752, now seen corresponding path program 1 times [2020-12-03 12:36:23,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:23,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085223465] [2020-12-03 12:36:23,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:23,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085223465] [2020-12-03 12:36:23,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:36:23,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-03 12:36:23,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545690318] [2020-12-03 12:36:23,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:36:23,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:23,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:36:23,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:36:23,740 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 3 states. [2020-12-03 12:36:23,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:23,773 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-12-03 12:36:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:36:23,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-03 12:36:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:23,776 INFO L225 Difference]: With dead ends: 19 [2020-12-03 12:36:23,776 INFO L226 Difference]: Without dead ends: 19 [2020-12-03 12:36:23,776 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 [2020-12-03 12:36:23,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-03 12:36:23,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-03 12:36:23,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-03 12:36:23,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-03 12:36:23,781 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2020-12-03 12:36:23,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:23,782 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-03 12:36:23,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:36:23,782 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-03 12:36:23,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:36:23,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:23,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:36:23,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:36:23,783 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:23,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:23,784 INFO L82 PathProgramCache]: Analyzing trace with hash 3080753, now seen corresponding path program 1 times [2020-12-03 12:36:23,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:23,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023581894] [2020-12-03 12:36:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:23,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023581894] [2020-12-03 12:36:23,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:36:23,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:36:23,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088210055] [2020-12-03 12:36:23,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:36:23,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:23,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:36:23,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:36:23,892 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2020-12-03 12:36:23,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:23,949 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-03 12:36:23,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:36:23,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-03 12:36:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:23,951 INFO L225 Difference]: With dead ends: 20 [2020-12-03 12:36:23,951 INFO L226 Difference]: Without dead ends: 20 [2020-12-03 12:36:23,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:36:23,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-03 12:36:23,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-03 12:36:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-03 12:36:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-03 12:36:23,960 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-12-03 12:36:23,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:23,960 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-03 12:36:23,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:36:23,960 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-03 12:36:23,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-03 12:36:23,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:23,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:23,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-03 12:36:23,963 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:23,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:23,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1585672413, now seen corresponding path program 1 times [2020-12-03 12:36:23,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:23,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877085571] [2020-12-03 12:36:23,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:24,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877085571] [2020-12-03 12:36:24,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631387410] [2020-12-03 12:36:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:24,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-03 12:36:24,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:24,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:24,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1905665434] [2020-12-03 12:36:24,288 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:36:24,288 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:24,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:24,297 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:24,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:24,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:25,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:25,235 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:36:25,896 WARN L197 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 86 [2020-12-03 12:36:26,427 WARN L197 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 62 [2020-12-03 12:36:26,933 WARN L197 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2020-12-03 12:36:26,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:26,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2020-12-03 12:36:26,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547681245] [2020-12-03 12:36:26,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:36:26,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:26,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:36:26,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:36:26,937 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-12-03 12:36:27,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:27,059 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-12-03 12:36:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:36:27,060 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-03 12:36:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:27,060 INFO L225 Difference]: With dead ends: 25 [2020-12-03 12:36:27,060 INFO L226 Difference]: Without dead ends: 25 [2020-12-03 12:36:27,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:36:27,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-03 12:36:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-03 12:36:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-03 12:36:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-03 12:36:27,064 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2020-12-03 12:36:27,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:27,064 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-03 12:36:27,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:36:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-03 12:36:27,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:36:27,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:27,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:27,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:27,282 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:27,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:27,283 INFO L82 PathProgramCache]: Analyzing trace with hash 596146973, now seen corresponding path program 1 times [2020-12-03 12:36:27,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:27,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878833849] [2020-12-03 12:36:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:27,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878833849] [2020-12-03 12:36:27,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972761477] [2020-12-03 12:36:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:27,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 12:36:27,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:27,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:27,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [765708449] [2020-12-03 12:36:27,591 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:36:27,592 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:27,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:27,592 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:27,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:27,686 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:27,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:27,941 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:28,576 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:36:28,745 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-03 12:36:29,275 WARN L197 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-03 12:36:29,446 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-03 12:36:29,644 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-03 12:36:29,805 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-12-03 12:36:29,988 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-03 12:36:29,990 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:36:29,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:29,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2020-12-03 12:36:29,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477395429] [2020-12-03 12:36:29,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-03 12:36:29,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:29,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-03 12:36:29,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-12-03 12:36:29,992 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 10 states. [2020-12-03 12:36:30,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:30,275 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-12-03 12:36:30,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-03 12:36:30,275 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2020-12-03 12:36:30,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:30,277 INFO L225 Difference]: With dead ends: 64 [2020-12-03 12:36:30,278 INFO L226 Difference]: Without dead ends: 64 [2020-12-03 12:36:30,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2020-12-03 12:36:30,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-03 12:36:30,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 33. [2020-12-03 12:36:30,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-03 12:36:30,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-12-03 12:36:30,284 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 10 [2020-12-03 12:36:30,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:30,284 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-12-03 12:36:30,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-03 12:36:30,284 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-12-03 12:36:30,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:36:30,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:30,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:30,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:30,502 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:30,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:30,502 INFO L82 PathProgramCache]: Analyzing trace with hash 596149066, now seen corresponding path program 1 times [2020-12-03 12:36:30,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:30,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244261658] [2020-12-03 12:36:30,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:30,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244261658] [2020-12-03 12:36:30,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108515634] [2020-12-03 12:36:30,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:30,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-03 12:36:30,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:30,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:30,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1908689139] [2020-12-03 12:36:30,858 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:36:30,858 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:30,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:30,859 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:30,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:30,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:31,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:31,241 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:31,732 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:36:31,965 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-12-03 12:36:32,491 WARN L197 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-03 12:36:32,653 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-03 12:36:32,859 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-03 12:36:33,020 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-12-03 12:36:33,184 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-03 12:36:33,186 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:36:33,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:33,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 8 [2020-12-03 12:36:33,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071005837] [2020-12-03 12:36:33,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-03 12:36:33,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:33,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-03 12:36:33,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-12-03 12:36:33,189 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 10 states. [2020-12-03 12:36:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:33,315 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2020-12-03 12:36:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:36:33,315 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2020-12-03 12:36:33,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:33,319 INFO L225 Difference]: With dead ends: 61 [2020-12-03 12:36:33,319 INFO L226 Difference]: Without dead ends: 61 [2020-12-03 12:36:33,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-03 12:36:33,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-03 12:36:33,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-12-03 12:36:33,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-03 12:36:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2020-12-03 12:36:33,334 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 10 [2020-12-03 12:36:33,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:33,334 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2020-12-03 12:36:33,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-03 12:36:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2020-12-03 12:36:33,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-03 12:36:33,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:33,336 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:33,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:33,562 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:33,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:33,562 INFO L82 PathProgramCache]: Analyzing trace with hash 188329252, now seen corresponding path program 1 times [2020-12-03 12:36:33,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:33,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144792838] [2020-12-03 12:36:33,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-03 12:36:33,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144792838] [2020-12-03 12:36:33,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265923226] [2020-12-03 12:36:33,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/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 [2020-12-03 12:36:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:33,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 12:36:33,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:33,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:33,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1701107965] [2020-12-03 12:36:33,790 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-03 12:36:33,790 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:33,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:33,790 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:33,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:33,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:34,070 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:34,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:34,689 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:36:35,161 WARN L197 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-03 12:36:35,301 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-03 12:36:35,459 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-03 12:36:35,583 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-12-03 12:36:35,714 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-03 12:36:35,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:35,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 4, 4] total 16 [2020-12-03 12:36:35,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319764184] [2020-12-03 12:36:35,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 12:36:35,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:35,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 12:36:35,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-12-03 12:36:35,818 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand 8 states. [2020-12-03 12:36:36,172 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2020-12-03 12:36:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:36,280 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2020-12-03 12:36:36,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 12:36:36,280 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-03 12:36:36,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:36,281 INFO L225 Difference]: With dead ends: 54 [2020-12-03 12:36:36,281 INFO L226 Difference]: Without dead ends: 54 [2020-12-03 12:36:36,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-12-03 12:36:36,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-03 12:36:36,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-03 12:36:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-03 12:36:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-12-03 12:36:36,286 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 13 [2020-12-03 12:36:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:36,286 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-12-03 12:36:36,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 12:36:36,286 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2020-12-03 12:36:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-03 12:36:36,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:36,287 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2020-12-03 12:36:36,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-12-03 12:36:36,490 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:36,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:36,490 INFO L82 PathProgramCache]: Analyzing trace with hash 188258073, now seen corresponding path program 2 times [2020-12-03 12:36:36,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:36,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925535793] [2020-12-03 12:36:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:36:36,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925535793] [2020-12-03 12:36:36,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:36:36,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:36:36,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508845574] [2020-12-03 12:36:36,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:36:36,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:36,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:36:36,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:36:36,548 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand 3 states. [2020-12-03 12:36:36,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:36,573 INFO L93 Difference]: Finished difference Result 81 states and 110 transitions. [2020-12-03 12:36:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:36:36,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-03 12:36:36,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:36,575 INFO L225 Difference]: With dead ends: 81 [2020-12-03 12:36:36,576 INFO L226 Difference]: Without dead ends: 81 [2020-12-03 12:36:36,576 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 [2020-12-03 12:36:36,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-03 12:36:36,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2020-12-03 12:36:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-03 12:36:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2020-12-03 12:36:36,590 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 13 [2020-12-03 12:36:36,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:36,591 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2020-12-03 12:36:36,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:36:36,591 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2020-12-03 12:36:36,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-03 12:36:36,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:36,592 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2020-12-03 12:36:36,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2020-12-03 12:36:36,593 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:36,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:36,593 INFO L82 PathProgramCache]: Analyzing trace with hash 521636203, now seen corresponding path program 3 times [2020-12-03 12:36:36,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:36,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166531950] [2020-12-03 12:36:36,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-03 12:36:36,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166531950] [2020-12-03 12:36:36,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483556102] [2020-12-03 12:36:36,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/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 [2020-12-03 12:36:36,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-03 12:36:36,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:36:36,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 12:36:36,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-03 12:36:36,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-03 12:36:36,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1588460570] [2020-12-03 12:36:36,802 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:36:36,802 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:36,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:36,803 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:36,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:36,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:37,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:37,081 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:37,488 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:36:37,620 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-03 12:36:38,009 WARN L197 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-03 12:36:38,272 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-03 12:36:38,418 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-12-03 12:36:38,573 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-03 12:36:38,575 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:36:38,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:38,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2020-12-03 12:36:38,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622183204] [2020-12-03 12:36:38,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 12:36:38,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:38,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 12:36:38,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-12-03 12:36:38,577 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand 8 states. [2020-12-03 12:36:38,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:38,669 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-12-03 12:36:38,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:36:38,669 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-03 12:36:38,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:38,670 INFO L225 Difference]: With dead ends: 52 [2020-12-03 12:36:38,670 INFO L226 Difference]: Without dead ends: 52 [2020-12-03 12:36:38,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-12-03 12:36:38,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-03 12:36:38,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-12-03 12:36:38,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-03 12:36:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2020-12-03 12:36:38,673 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 13 [2020-12-03 12:36:38,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:38,674 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2020-12-03 12:36:38,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 12:36:38,674 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2020-12-03 12:36:38,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-03 12:36:38,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:38,675 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2020-12-03 12:36:38,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:38,878 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:38,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:38,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1541033020, now seen corresponding path program 1 times [2020-12-03 12:36:38,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:38,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559397992] [2020-12-03 12:36:38,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:38,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559397992] [2020-12-03 12:36:38,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782615900] [2020-12-03 12:36:38,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/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 [2020-12-03 12:36:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:38,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-03 12:36:38,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:36:39,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:36:39,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1507348189] [2020-12-03 12:36:39,025 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:36:39,025 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:39,026 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:39,026 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:39,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:39,092 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:39,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:39,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:39,762 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:36:39,904 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-12-03 12:36:40,267 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-03 12:36:40,598 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-03 12:36:40,757 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-12-03 12:36:40,895 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-03 12:36:40,897 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:36:40,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:40,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 2, 2] total 4 [2020-12-03 12:36:40,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178354490] [2020-12-03 12:36:40,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:36:40,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:40,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:36:40,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:36:40,899 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand 5 states. [2020-12-03 12:36:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:40,956 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2020-12-03 12:36:40,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:36:40,957 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-03 12:36:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:40,957 INFO L225 Difference]: With dead ends: 44 [2020-12-03 12:36:40,957 INFO L226 Difference]: Without dead ends: 44 [2020-12-03 12:36:40,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:36:40,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-03 12:36:40,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-03 12:36:40,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-03 12:36:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-12-03 12:36:40,961 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 14 [2020-12-03 12:36:40,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:40,962 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-12-03 12:36:40,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:36:40,962 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-12-03 12:36:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-03 12:36:40,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:40,963 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2020-12-03 12:36:41,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:41,178 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:41,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:41,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1541033021, now seen corresponding path program 1 times [2020-12-03 12:36:41,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:41,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586345788] [2020-12-03 12:36:41,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:36:41,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586345788] [2020-12-03 12:36:41,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385705399] [2020-12-03 12:36:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/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 [2020-12-03 12:36:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:41,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-03 12:36:41,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:36:41,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:36:41,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [789646291] [2020-12-03 12:36:41,382 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:36:41,382 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:41,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:41,383 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:41,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:41,453 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:41,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:41,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:42,022 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:36:42,165 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-03 12:36:42,506 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-03 12:36:42,762 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-03 12:36:42,999 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-03 12:36:43,000 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:36:43,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:43,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-03 12:36:43,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213892050] [2020-12-03 12:36:43,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:36:43,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:43,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:36:43,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:36:43,002 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-12-03 12:36:43,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:43,097 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2020-12-03 12:36:43,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:36:43,097 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-03 12:36:43,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:43,098 INFO L225 Difference]: With dead ends: 73 [2020-12-03 12:36:43,099 INFO L226 Difference]: Without dead ends: 73 [2020-12-03 12:36:43,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-12-03 12:36:43,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-03 12:36:43,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2020-12-03 12:36:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-03 12:36:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2020-12-03 12:36:43,103 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 14 [2020-12-03 12:36:43,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:43,104 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2020-12-03 12:36:43,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:36:43,104 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2020-12-03 12:36:43,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-03 12:36:43,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:43,105 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:43,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:43,326 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:43,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:43,326 INFO L82 PathProgramCache]: Analyzing trace with hash 595785087, now seen corresponding path program 1 times [2020-12-03 12:36:43,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:43,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815350844] [2020-12-03 12:36:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:43,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815350844] [2020-12-03 12:36:43,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696638797] [2020-12-03 12:36:43,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/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 [2020-12-03 12:36:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:43,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 12:36:43,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:43,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:43,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [655538596] [2020-12-03 12:36:43,460 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-03 12:36:43,460 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:43,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:43,467 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:43,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:43,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:43,671 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:43,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:44,178 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:36:44,597 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-03 12:36:44,848 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-03 12:36:44,964 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-12-03 12:36:45,087 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-03 12:36:45,265 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:36:45,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:45,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2020-12-03 12:36:45,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116785732] [2020-12-03 12:36:45,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-03 12:36:45,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:45,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-03 12:36:45,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-12-03 12:36:45,267 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand 9 states. [2020-12-03 12:36:45,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:45,366 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2020-12-03 12:36:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 12:36:45,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-03 12:36:45,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:45,368 INFO L225 Difference]: With dead ends: 103 [2020-12-03 12:36:45,368 INFO L226 Difference]: Without dead ends: 103 [2020-12-03 12:36:45,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-12-03 12:36:45,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-03 12:36:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-12-03 12:36:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-03 12:36:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 110 transitions. [2020-12-03 12:36:45,373 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 110 transitions. Word has length 15 [2020-12-03 12:36:45,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:45,374 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 110 transitions. [2020-12-03 12:36:45,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-03 12:36:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 110 transitions. [2020-12-03 12:36:45,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-03 12:36:45,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:45,375 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1] [2020-12-03 12:36:45,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2020-12-03 12:36:45,582 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:45,582 INFO L82 PathProgramCache]: Analyzing trace with hash -830929546, now seen corresponding path program 4 times [2020-12-03 12:36:45,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:45,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704015836] [2020-12-03 12:36:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:36:45,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704015836] [2020-12-03 12:36:45,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332580165] [2020-12-03 12:36:45,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/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 [2020-12-03 12:36:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:45,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 12:36:45,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:36:45,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:36:45,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1077700675] [2020-12-03 12:36:45,715 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:36:45,715 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:45,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:45,716 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:45,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:45,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:45,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:45,929 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:46,264 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:36:46,378 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-03 12:36:46,743 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-03 12:36:46,995 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-03 12:36:47,247 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-03 12:36:47,248 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:36:47,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:47,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-12-03 12:36:47,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673359429] [2020-12-03 12:36:47,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:36:47,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:47,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:36:47,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:36:47,251 INFO L87 Difference]: Start difference. First operand 80 states and 110 transitions. Second operand 6 states. [2020-12-03 12:36:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:47,315 INFO L93 Difference]: Finished difference Result 194 states and 267 transitions. [2020-12-03 12:36:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:36:47,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-03 12:36:47,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:47,317 INFO L225 Difference]: With dead ends: 194 [2020-12-03 12:36:47,317 INFO L226 Difference]: Without dead ends: 194 [2020-12-03 12:36:47,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-12-03 12:36:47,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-03 12:36:47,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 100. [2020-12-03 12:36:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-03 12:36:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 138 transitions. [2020-12-03 12:36:47,324 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 138 transitions. Word has length 16 [2020-12-03 12:36:47,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:47,324 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 138 transitions. [2020-12-03 12:36:47,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:36:47,325 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 138 transitions. [2020-12-03 12:36:47,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-03 12:36:47,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:47,325 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1] [2020-12-03 12:36:47,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2020-12-03 12:36:47,554 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:47,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:47,554 INFO L82 PathProgramCache]: Analyzing trace with hash 924819805, now seen corresponding path program 2 times [2020-12-03 12:36:47,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:47,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826359500] [2020-12-03 12:36:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-03 12:36:47,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826359500] [2020-12-03 12:36:47,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857631112] [2020-12-03 12:36:47,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/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 [2020-12-03 12:36:47,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-03 12:36:47,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:36:47,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-03 12:36:47,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-03 12:36:47,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-03 12:36:47,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [269180813] [2020-12-03 12:36:47,873 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:36:47,873 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:47,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:47,874 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:47,874 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:47,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:48,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:48,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:48,634 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:36:48,854 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-03 12:36:49,277 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-03 12:36:49,401 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-03 12:36:49,554 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-03 12:36:49,881 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-03 12:36:49,882 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:36:49,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:49,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2020-12-03 12:36:49,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932565190] [2020-12-03 12:36:49,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 12:36:49,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 12:36:49,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-12-03 12:36:49,885 INFO L87 Difference]: Start difference. First operand 100 states and 138 transitions. Second operand 12 states. [2020-12-03 12:36:50,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:50,016 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2020-12-03 12:36:50,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:36:50,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-12-03 12:36:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:50,020 INFO L225 Difference]: With dead ends: 98 [2020-12-03 12:36:50,020 INFO L226 Difference]: Without dead ends: 98 [2020-12-03 12:36:50,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-12-03 12:36:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-03 12:36:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 58. [2020-12-03 12:36:50,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-03 12:36:50,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2020-12-03 12:36:50,029 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 20 [2020-12-03 12:36:50,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:50,030 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2020-12-03 12:36:50,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 12:36:50,030 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2020-12-03 12:36:50,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-03 12:36:50,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:50,031 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1] [2020-12-03 12:36:50,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:50,250 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:50,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:50,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1432583701, now seen corresponding path program 2 times [2020-12-03 12:36:50,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:50,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710624132] [2020-12-03 12:36:50,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 39 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-03 12:36:50,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710624132] [2020-12-03 12:36:50,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321606486] [2020-12-03 12:36:50,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/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 [2020-12-03 12:36:50,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-03 12:36:50,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:36:50,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-03 12:36:50,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-03 12:36:50,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-03 12:36:50,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [27485107] [2020-12-03 12:36:50,701 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:36:50,701 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:50,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:50,702 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:50,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:50,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:50,887 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:50,925 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:51,299 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:36:51,501 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-12-03 12:36:51,934 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-03 12:36:52,203 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-03 12:36:52,475 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-03 12:36:52,476 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:36:52,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:52,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 14 [2020-12-03 12:36:52,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063493627] [2020-12-03 12:36:52,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-03 12:36:52,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:52,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-03 12:36:52,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2020-12-03 12:36:52,478 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 14 states. [2020-12-03 12:36:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:53,037 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-12-03 12:36:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-03 12:36:53,037 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-12-03 12:36:53,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:53,038 INFO L225 Difference]: With dead ends: 74 [2020-12-03 12:36:53,038 INFO L226 Difference]: Without dead ends: 74 [2020-12-03 12:36:53,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-12-03 12:36:53,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-03 12:36:53,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2020-12-03 12:36:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-03 12:36:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2020-12-03 12:36:53,044 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 28 [2020-12-03 12:36:53,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:53,045 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2020-12-03 12:36:53,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-03 12:36:53,045 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2020-12-03 12:36:53,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-03 12:36:53,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:53,050 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:53,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2020-12-03 12:36:53,268 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:53,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:53,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1496073855, now seen corresponding path program 2 times [2020-12-03 12:36:53,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:53,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764492690] [2020-12-03 12:36:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 149 proven. 27 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-03 12:36:53,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764492690] [2020-12-03 12:36:53,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295099309] [2020-12-03 12:36:53,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:53,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-03 12:36:53,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:36:53,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 12:36:53,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-12-03 12:36:53,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-12-03 12:36:53,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-03 12:36:53,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [9] total 13 [2020-12-03 12:36:53,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304739477] [2020-12-03 12:36:53,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:36:53,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:53,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:36:53,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-12-03 12:36:53,686 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 6 states. [2020-12-03 12:36:53,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:53,715 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2020-12-03 12:36:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:36:53,715 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-12-03 12:36:53,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:53,718 INFO L225 Difference]: With dead ends: 67 [2020-12-03 12:36:53,718 INFO L226 Difference]: Without dead ends: 0 [2020-12-03 12:36:53,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-12-03 12:36:53,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-03 12:36:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-03 12:36:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-03 12:36:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-03 12:36:53,720 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2020-12-03 12:36:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:53,720 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-03 12:36:53,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:36:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-03 12:36:53,720 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-03 12:36:53,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2020-12-03 12:36:53,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:36:53 BoogieIcfgContainer [2020-12-03 12:36:53,937 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:36:53,938 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:36:53,938 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:36:53,938 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:36:53,939 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:36:23" (3/4) ... [2020-12-03 12:36:53,941 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-03 12:36:53,949 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-12-03 12:36:53,950 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-03 12:36:53,950 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-03 12:36:53,994 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4e3630aa-9095-4287-8347-a4815e9e16d5/bin/utaipan/witness.graphml [2020-12-03 12:36:53,994 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:36:53,995 INFO L168 Benchmark]: Toolchain (without parser) took 31898.04 ms. Allocated memory was 94.4 MB in the beginning and 249.6 MB in the end (delta: 155.2 MB). Free memory was 74.2 MB in the beginning and 192.4 MB in the end (delta: -118.2 MB). Peak memory consumption was 37.2 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:53,995 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 77.6 MB. Free memory is still 53.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:53,995 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.06 ms. Allocated memory is still 94.4 MB. Free memory was 74.0 MB in the beginning and 67.0 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:53,996 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.25 ms. Allocated memory is still 94.4 MB. Free memory was 67.0 MB in the beginning and 65.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:53,996 INFO L168 Benchmark]: Boogie Preprocessor took 24.72 ms. Allocated memory is still 94.4 MB. Free memory was 65.5 MB in the beginning and 64.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:53,996 INFO L168 Benchmark]: RCFGBuilder took 622.27 ms. Allocated memory is still 94.4 MB. Free memory was 64.2 MB in the beginning and 41.9 MB in the end (delta: 22.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:53,997 INFO L168 Benchmark]: TraceAbstraction took 30910.62 ms. Allocated memory was 94.4 MB in the beginning and 249.6 MB in the end (delta: 155.2 MB). Free memory was 41.6 MB in the beginning and 195.6 MB in the end (delta: -154.0 MB). Peak memory consumption was 1.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:53,997 INFO L168 Benchmark]: Witness Printer took 56.07 ms. Allocated memory is still 249.6 MB. Free memory was 194.5 MB in the beginning and 192.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:53,999 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 77.6 MB. Free memory is still 53.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 243.06 ms. Allocated memory is still 94.4 MB. Free memory was 74.0 MB in the beginning and 67.0 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.25 ms. Allocated memory is still 94.4 MB. Free memory was 67.0 MB in the beginning and 65.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.72 ms. Allocated memory is still 94.4 MB. Free memory was 65.5 MB in the beginning and 64.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 622.27 ms. Allocated memory is still 94.4 MB. Free memory was 64.2 MB in the beginning and 41.9 MB in the end (delta: 22.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 30910.62 ms. Allocated memory was 94.4 MB in the beginning and 249.6 MB in the end (delta: 155.2 MB). Free memory was 41.6 MB in the beginning and 195.6 MB in the end (delta: -154.0 MB). Peak memory consumption was 1.4 MB. Max. memory is 16.1 GB. * Witness Printer took 56.07 ms. Allocated memory is still 249.6 MB. Free memory was 194.5 MB in the beginning and 192.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 30.8s, OverallIterations: 17, TraceHistogramMax: 9, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 182 SDtfs, 577 SDslu, 287 SDs, 0 SdLazy, 861 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 655 GetRequests, 459 SyntacticMatches, 6 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 15.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 286 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 451 NumberOfCodeBlocks, 373 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 621 ConstructedInterpolants, 11 QuantifiedInterpolants, 147489 SizeOfPredicates, 49 NumberOfNonLiveVariables, 1142 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 41 InterpolantComputations, 7 PerfectInterpolantSequences, 941/1181 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 1847, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 18, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 44, TOOLS_POST_TIME[ms]: 939, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 44, TOOLS_QUANTIFIERELIM_TIME[ms]: 915, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 158, FLUID_QUERY_TIME[ms]: 5, FLUID_QUERIES: 77, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 8, DOMAIN_JOIN_TIME[ms]: 471, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 4, DOMAIN_WIDEN_TIME[ms]: 325, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME[ms]: 20, DOMAIN_ISBOTTOM_APPLICATIONS: 18, DOMAIN_ISBOTTOM_TIME[ms]: 42, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 1229, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 1228, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 10, DAG_COMPRESSION_PROCESSED_NODES: 139, DAG_COMPRESSION_RETAINED_NODES: 54, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...