./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i --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_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/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 b05f810cf5c3fdbb476cd22f2154f4cd5a41b63d ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 06:57:17,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 06:57:17,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 06:57:17,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 06:57:17,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 06:57:17,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 06:57:17,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 06:57:17,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 06:57:17,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 06:57:17,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 06:57:17,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 06:57:17,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 06:57:17,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 06:57:17,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 06:57:17,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 06:57:17,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 06:57:17,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 06:57:17,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 06:57:17,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 06:57:17,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 06:57:17,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 06:57:17,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 06:57:17,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 06:57:17,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 06:57:17,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 06:57:17,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 06:57:17,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 06:57:17,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 06:57:17,352 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 06:57:17,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 06:57:17,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 06:57:17,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 06:57:17,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 06:57:17,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 06:57:17,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 06:57:17,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 06:57:17,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 06:57:17,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 06:57:17,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 06:57:17,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 06:57:17,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 06:57:17,359 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 06:57:17,381 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 06:57:17,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 06:57:17,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 06:57:17,382 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 06:57:17,382 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 06:57:17,382 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 06:57:17,383 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 06:57:17,383 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 06:57:17,383 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 06:57:17,383 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 06:57:17,383 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 06:57:17,383 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 06:57:17,383 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 06:57:17,384 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 06:57:17,384 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 06:57:17,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 06:57:17,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 06:57:17,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 06:57:17,385 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 06:57:17,385 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 06:57:17,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 06:57:17,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 06:57:17,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 06:57:17,385 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 06:57:17,385 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 06:57:17,385 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 06:57:17,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 06:57:17,386 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 06:57:17,386 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 06:57:17,386 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 06:57:17,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 06:57:17,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 06:57:17,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:57:17,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 06:57:17,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 06:57:17,387 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 06:57:17,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 06:57:17,387 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 06:57:17,387 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 06:57:17,388 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_c956799f-1424-41a3-ab68-98705feb10b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b05f810cf5c3fdbb476cd22f2154f4cd5a41b63d [2020-12-09 06:57:17,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 06:57:17,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 06:57:17,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 06:57:17,594 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 06:57:17,594 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 06:57:17,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2020-12-09 06:57:17,637 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/data/81970a99f/8d4fd7a49db543ffb40c2f5550dd0a1b/FLAGde2592f6a [2020-12-09 06:57:18,049 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 06:57:18,049 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2020-12-09 06:57:18,061 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/data/81970a99f/8d4fd7a49db543ffb40c2f5550dd0a1b/FLAGde2592f6a [2020-12-09 06:57:18,073 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/data/81970a99f/8d4fd7a49db543ffb40c2f5550dd0a1b [2020-12-09 06:57:18,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 06:57:18,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 06:57:18,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 06:57:18,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 06:57:18,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 06:57:18,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:57:18" (1/1) ... [2020-12-09 06:57:18,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ada1f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:18, skipping insertion in model container [2020-12-09 06:57:18,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:57:18" (1/1) ... [2020-12-09 06:57:18,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 06:57:18,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 06:57:18,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:57:18,348 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 06:57:18,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:57:18,419 INFO L208 MainTranslator]: Completed translation [2020-12-09 06:57:18,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:18 WrapperNode [2020-12-09 06:57:18,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 06:57:18,420 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 06:57:18,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 06:57:18,420 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 06:57:18,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:18" (1/1) ... [2020-12-09 06:57:18,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:18" (1/1) ... [2020-12-09 06:57:18,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 06:57:18,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 06:57:18,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 06:57:18,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 06:57:18,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:18" (1/1) ... [2020-12-09 06:57:18,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:18" (1/1) ... [2020-12-09 06:57:18,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:18" (1/1) ... [2020-12-09 06:57:18,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:18" (1/1) ... [2020-12-09 06:57:18,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:18" (1/1) ... [2020-12-09 06:57:18,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:18" (1/1) ... [2020-12-09 06:57:18,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:18" (1/1) ... [2020-12-09 06:57:18,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 06:57:18,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 06:57:18,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 06:57:18,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 06:57:18,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:57:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 06:57:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 06:57:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 06:57:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 06:57:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 06:57:18,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 06:57:18,868 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 06:57:18,868 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 06:57:18,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:57:18 BoogieIcfgContainer [2020-12-09 06:57:18,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 06:57:18,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 06:57:18,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 06:57:18,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 06:57:18,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:57:18" (1/3) ... [2020-12-09 06:57:18,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32da684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:57:18, skipping insertion in model container [2020-12-09 06:57:18,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:18" (2/3) ... [2020-12-09 06:57:18,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32da684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:57:18, skipping insertion in model container [2020-12-09 06:57:18,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:57:18" (3/3) ... [2020-12-09 06:57:18,875 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2020-12-09 06:57:18,885 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 06:57:18,887 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-12-09 06:57:18,894 INFO L253 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-12-09 06:57:18,907 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 06:57:18,908 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 06:57:18,908 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 06:57:18,908 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 06:57:18,908 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 06:57:18,908 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 06:57:18,908 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 06:57:18,908 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 06:57:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-12-09 06:57:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 06:57:18,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:18,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 06:57:18,922 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:18,929 INFO L82 PathProgramCache]: Analyzing trace with hash 144888, now seen corresponding path program 1 times [2020-12-09 06:57:18,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:18,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901712623] [2020-12-09 06:57:18,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:19,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901712623] [2020-12-09 06:57:19,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:57:19,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 06:57:19,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455144806] [2020-12-09 06:57:19,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 06:57:19,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:19,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 06:57:19,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 06:57:19,066 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-12-09 06:57:19,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:19,096 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-12-09 06:57:19,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 06:57:19,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 06:57:19,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:19,102 INFO L225 Difference]: With dead ends: 29 [2020-12-09 06:57:19,102 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 06:57:19,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 06:57:19,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 06:57:19,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-09 06:57:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 06:57:19,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-09 06:57:19,124 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 3 [2020-12-09 06:57:19,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:19,125 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-09 06:57:19,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 06:57:19,125 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-09 06:57:19,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 06:57:19,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:19,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 06:57:19,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 06:57:19,125 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:19,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:19,126 INFO L82 PathProgramCache]: Analyzing trace with hash 144889, now seen corresponding path program 1 times [2020-12-09 06:57:19,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:19,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402167459] [2020-12-09 06:57:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:19,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402167459] [2020-12-09 06:57:19,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:57:19,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:57:19,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983788526] [2020-12-09 06:57:19,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:57:19,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:19,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:57:19,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:57:19,181 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2020-12-09 06:57:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:19,225 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-12-09 06:57:19,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 06:57:19,225 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-12-09 06:57:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:19,226 INFO L225 Difference]: With dead ends: 30 [2020-12-09 06:57:19,226 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 06:57:19,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:57:19,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 06:57:19,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-09 06:57:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 06:57:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-12-09 06:57:19,231 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 3 [2020-12-09 06:57:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:19,232 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-12-09 06:57:19,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:57:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-12-09 06:57:19,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 06:57:19,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:19,232 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-12-09 06:57:19,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 06:57:19,233 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:19,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:19,234 INFO L82 PathProgramCache]: Analyzing trace with hash 139321714, now seen corresponding path program 1 times [2020-12-09 06:57:19,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:19,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158304950] [2020-12-09 06:57:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:19,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158304950] [2020-12-09 06:57:19,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394523390] [2020-12-09 06:57:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:19,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 06:57:19,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:19,390 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_40|], 1=[|ULTIMATE.start_main_old_#valid|]} [2020-12-09 06:57:19,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 06:57:19,405 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 06:57:19,406 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 06:57:19,415 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 06:57:19,422 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 06:57:19,427 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 06:57:19,432 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 06:57:19,435 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 06:57:19,435 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-09 06:57:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:19,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:19,493 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 06:57:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:19,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [273219325] [2020-12-09 06:57:19,536 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-12-09 06:57:19,536 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:57:19,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:57:19,545 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:57:19,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:57:19,912 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:57:20,183 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:57:20,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:57:20,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2020-12-09 06:57:20,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186994827] [2020-12-09 06:57:20,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 06:57:20,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:20,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 06:57:20,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-09 06:57:20,185 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 9 states. [2020-12-09 06:57:20,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:20,265 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-12-09 06:57:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 06:57:20,265 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2020-12-09 06:57:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:20,265 INFO L225 Difference]: With dead ends: 29 [2020-12-09 06:57:20,265 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 06:57:20,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-09 06:57:20,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 06:57:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-09 06:57:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 06:57:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-09 06:57:20,268 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 5 [2020-12-09 06:57:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:20,268 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-09 06:57:20,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 06:57:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-09 06:57:20,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 06:57:20,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:20,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 06:57:20,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 06:57:20,470 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:20,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:20,471 INFO L82 PathProgramCache]: Analyzing trace with hash 24098178, now seen corresponding path program 1 times [2020-12-09 06:57:20,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:20,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622102912] [2020-12-09 06:57:20,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:20,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622102912] [2020-12-09 06:57:20,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730622463] [2020-12-09 06:57:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:20,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 06:57:20,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:20,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:20,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [44141104] [2020-12-09 06:57:20,783 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 06:57:20,783 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:57:20,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:57:20,783 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:57:20,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:57:21,137 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:57:21,397 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-12-09 06:57:21,635 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 57 [2020-12-09 06:57:21,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:57:21,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4, 4] total 16 [2020-12-09 06:57:21,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549182649] [2020-12-09 06:57:21,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 06:57:21,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:21,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 06:57:21,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-09 06:57:21,638 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-12-09 06:57:21,825 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-12-09 06:57:21,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:21,878 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-09 06:57:21,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 06:57:21,878 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-09 06:57:21,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:21,878 INFO L225 Difference]: With dead ends: 32 [2020-12-09 06:57:21,879 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 06:57:21,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-09 06:57:21,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 06:57:21,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-12-09 06:57:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 06:57:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-12-09 06:57:21,881 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 6 [2020-12-09 06:57:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:21,881 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-12-09 06:57:21,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 06:57:21,882 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-12-09 06:57:21,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 06:57:21,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:21,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 06:57:22,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-09 06:57:22,084 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:22,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:22,085 INFO L82 PathProgramCache]: Analyzing trace with hash 24095719, now seen corresponding path program 1 times [2020-12-09 06:57:22,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:22,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867982861] [2020-12-09 06:57:22,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:22,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867982861] [2020-12-09 06:57:22,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:57:22,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 06:57:22,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779039706] [2020-12-09 06:57:22,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 06:57:22,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:22,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 06:57:22,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 06:57:22,133 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2020-12-09 06:57:22,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:22,148 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-12-09 06:57:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 06:57:22,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 06:57:22,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:22,149 INFO L225 Difference]: With dead ends: 27 [2020-12-09 06:57:22,149 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 06:57:22,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 06:57:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 06:57:22,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-09 06:57:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 06:57:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-09 06:57:22,151 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 6 [2020-12-09 06:57:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:22,152 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-09 06:57:22,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 06:57:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-09 06:57:22,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 06:57:22,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:22,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 06:57:22,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-12-09 06:57:22,152 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:22,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:22,152 INFO L82 PathProgramCache]: Analyzing trace with hash 24095720, now seen corresponding path program 1 times [2020-12-09 06:57:22,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:22,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074097511] [2020-12-09 06:57:22,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:22,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074097511] [2020-12-09 06:57:22,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:57:22,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 06:57:22,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345849145] [2020-12-09 06:57:22,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 06:57:22,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:22,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 06:57:22,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:57:22,185 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-12-09 06:57:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:22,217 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-12-09 06:57:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 06:57:22,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-09 06:57:22,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:22,218 INFO L225 Difference]: With dead ends: 28 [2020-12-09 06:57:22,218 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 06:57:22,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 06:57:22,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 06:57:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-09 06:57:22,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 06:57:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-09 06:57:22,220 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 6 [2020-12-09 06:57:22,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:22,220 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-09 06:57:22,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 06:57:22,221 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-09 06:57:22,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 06:57:22,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:22,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:22,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-12-09 06:57:22,221 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:22,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1681216678, now seen corresponding path program 1 times [2020-12-09 06:57:22,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:22,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607678505] [2020-12-09 06:57:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:22,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607678505] [2020-12-09 06:57:22,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204333473] [2020-12-09 06:57:22,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:22,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 06:57:22,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:22,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:22,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1720707800] [2020-12-09 06:57:22,443 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 06:57:22,443 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:57:22,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:57:22,443 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:57:22,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:57:22,907 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:57:23,060 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-12-09 06:57:23,414 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-12-09 06:57:23,668 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-12-09 06:57:23,669 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:57:23,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:57:23,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2020-12-09 06:57:23,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087210097] [2020-12-09 06:57:23,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 06:57:23,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:23,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 06:57:23,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-12-09 06:57:23,670 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 14 states. [2020-12-09 06:57:23,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:23,753 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-12-09 06:57:23,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 06:57:23,753 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 8 [2020-12-09 06:57:23,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:23,754 INFO L225 Difference]: With dead ends: 28 [2020-12-09 06:57:23,754 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 06:57:23,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2020-12-09 06:57:23,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 06:57:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-09 06:57:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 06:57:23,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-09 06:57:23,757 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2020-12-09 06:57:23,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:23,757 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-09 06:57:23,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 06:57:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-09 06:57:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 06:57:23,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:23,758 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:23,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-09 06:57:23,960 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:23,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:23,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1681214220, now seen corresponding path program 1 times [2020-12-09 06:57:23,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:23,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855259855] [2020-12-09 06:57:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:24,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855259855] [2020-12-09 06:57:24,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354014109] [2020-12-09 06:57:24,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:24,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 06:57:24,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:24,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:24,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [675289531] [2020-12-09 06:57:24,143 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 06:57:24,144 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:57:24,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:57:24,144 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:57:24,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:57:24,462 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:57:24,884 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-12-09 06:57:24,964 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:57:24,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:57:24,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2020-12-09 06:57:24,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660545904] [2020-12-09 06:57:24,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 06:57:24,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:24,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 06:57:24,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-12-09 06:57:24,965 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 11 states. [2020-12-09 06:57:25,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:25,014 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-12-09 06:57:25,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 06:57:25,015 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 8 [2020-12-09 06:57:25,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:25,015 INFO L225 Difference]: With dead ends: 26 [2020-12-09 06:57:25,015 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 06:57:25,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-12-09 06:57:25,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 06:57:25,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-09 06:57:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 06:57:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-09 06:57:25,017 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 8 [2020-12-09 06:57:25,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:25,017 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-09 06:57:25,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 06:57:25,018 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-09 06:57:25,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 06:57:25,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:25,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:25,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:25,220 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:25,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:25,221 INFO L82 PathProgramCache]: Analyzing trace with hash 578109460, now seen corresponding path program 1 times [2020-12-09 06:57:25,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:25,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578028313] [2020-12-09 06:57:25,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:25,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578028313] [2020-12-09 06:57:25,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592022130] [2020-12-09 06:57:25,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:25,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 06:57:25,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:25,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:25,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627362810] [2020-12-09 06:57:25,405 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 06:57:25,405 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:57:25,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:57:25,405 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:57:25,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:57:25,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:57:25,696 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:57:25,703 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:57:25,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:57:25,816 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:57:26,147 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-12-09 06:57:26,434 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-12-09 06:57:26,750 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:57:26,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:57:26,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2020-12-09 06:57:26,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387770132] [2020-12-09 06:57:26,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 06:57:26,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:26,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 06:57:26,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2020-12-09 06:57:26,751 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 15 states. [2020-12-09 06:57:26,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:26,828 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-12-09 06:57:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 06:57:26,828 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 9 [2020-12-09 06:57:26,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:26,829 INFO L225 Difference]: With dead ends: 25 [2020-12-09 06:57:26,829 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 06:57:26,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2020-12-09 06:57:26,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 06:57:26,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-09 06:57:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 06:57:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-09 06:57:26,831 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2020-12-09 06:57:26,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:26,831 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-09 06:57:26,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 06:57:26,831 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-09 06:57:26,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 06:57:26,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:26,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:27,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-12-09 06:57:27,033 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:27,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:27,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1512460873, now seen corresponding path program 1 times [2020-12-09 06:57:27,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:27,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36647933] [2020-12-09 06:57:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:27,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36647933] [2020-12-09 06:57:27,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:57:27,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 06:57:27,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497903035] [2020-12-09 06:57:27,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 06:57:27,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:27,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 06:57:27,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:57:27,070 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2020-12-09 06:57:27,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:27,102 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-12-09 06:57:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 06:57:27,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 06:57:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:27,103 INFO L225 Difference]: With dead ends: 23 [2020-12-09 06:57:27,103 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 06:57:27,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 06:57:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 06:57:27,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-09 06:57:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 06:57:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-09 06:57:27,104 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 11 [2020-12-09 06:57:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:27,104 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-09 06:57:27,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 06:57:27,104 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-09 06:57:27,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 06:57:27,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:27,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:27,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2020-12-09 06:57:27,105 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:27,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:27,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1512460874, now seen corresponding path program 1 times [2020-12-09 06:57:27,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:27,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808352751] [2020-12-09 06:57:27,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:27,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808352751] [2020-12-09 06:57:27,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514869020] [2020-12-09 06:57:27,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:27,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 06:57:27,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:27,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:27,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [979709341] [2020-12-09 06:57:27,245 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 06:57:27,245 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:57:27,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:57:27,245 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:57:27,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:57:27,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:57:27,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:57:27,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:57:27,918 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:57:28,304 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-12-09 06:57:28,528 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-12-09 06:57:28,661 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-12-09 06:57:29,047 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2020-12-09 06:57:29,456 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2020-12-09 06:57:29,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:57:29,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4, 4] total 16 [2020-12-09 06:57:29,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704246550] [2020-12-09 06:57:29,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 06:57:29,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:29,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 06:57:29,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-12-09 06:57:29,458 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2020-12-09 06:57:29,652 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-12-09 06:57:29,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:29,726 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-12-09 06:57:29,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 06:57:29,727 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2020-12-09 06:57:29,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:29,727 INFO L225 Difference]: With dead ends: 26 [2020-12-09 06:57:29,727 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 06:57:29,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-12-09 06:57:29,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 06:57:29,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-09 06:57:29,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 06:57:29,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-09 06:57:29,729 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2020-12-09 06:57:29,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:29,730 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-09 06:57:29,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 06:57:29,730 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-09 06:57:29,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 06:57:29,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:29,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:29,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:29,932 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:29,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:29,934 INFO L82 PathProgramCache]: Analyzing trace with hash -778742729, now seen corresponding path program 1 times [2020-12-09 06:57:29,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:29,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106868934] [2020-12-09 06:57:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:29,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106868934] [2020-12-09 06:57:29,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:57:29,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 06:57:29,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507646011] [2020-12-09 06:57:29,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 06:57:29,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:29,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 06:57:29,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 06:57:29,996 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-12-09 06:57:30,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:30,037 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-12-09 06:57:30,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 06:57:30,038 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-09 06:57:30,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:30,038 INFO L225 Difference]: With dead ends: 27 [2020-12-09 06:57:30,038 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 06:57:30,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-09 06:57:30,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 06:57:30,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-09 06:57:30,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 06:57:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-09 06:57:30,040 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2020-12-09 06:57:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:30,040 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-09 06:57:30,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 06:57:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-09 06:57:30,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 06:57:30,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:30,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:30,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260 [2020-12-09 06:57:30,040 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:30,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:30,041 INFO L82 PathProgramCache]: Analyzing trace with hash -778742728, now seen corresponding path program 1 times [2020-12-09 06:57:30,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:30,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233786949] [2020-12-09 06:57:30,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:30,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233786949] [2020-12-09 06:57:30,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459129034] [2020-12-09 06:57:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:30,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-09 06:57:30,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:30,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:30,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1961913764] [2020-12-09 06:57:30,229 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-09 06:57:30,229 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:57:30,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:57:30,229 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:57:30,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:57:30,483 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:57:30,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:57:30,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:57:30,612 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:57:30,860 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-12-09 06:57:31,416 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-12-09 06:57:31,599 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-12-09 06:57:31,830 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-12-09 06:57:32,051 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-12-09 06:57:32,317 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2020-12-09 06:57:32,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:57:32,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7, 6, 6] total 24 [2020-12-09 06:57:32,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398211089] [2020-12-09 06:57:32,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 06:57:32,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:32,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 06:57:32,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2020-12-09 06:57:32,319 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 13 states. [2020-12-09 06:57:32,514 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-12-09 06:57:32,996 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-12-09 06:57:33,190 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 86 [2020-12-09 06:57:33,413 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 91 [2020-12-09 06:57:33,668 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 97 [2020-12-09 06:57:33,930 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 97 [2020-12-09 06:57:34,200 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 102 [2020-12-09 06:57:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:34,256 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-09 06:57:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-09 06:57:34,257 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2020-12-09 06:57:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:34,257 INFO L225 Difference]: With dead ends: 28 [2020-12-09 06:57:34,257 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 06:57:34,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2020-12-09 06:57:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 06:57:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-09 06:57:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 06:57:34,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-12-09 06:57:34,259 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2020-12-09 06:57:34,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:34,259 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-12-09 06:57:34,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 06:57:34,259 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-12-09 06:57:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 06:57:34,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:34,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:34,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:34,461 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:34,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:34,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1628741520, now seen corresponding path program 1 times [2020-12-09 06:57:34,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:34,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429741281] [2020-12-09 06:57:34,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 06:57:34,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429741281] [2020-12-09 06:57:34,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:57:34,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:57:34,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540274025] [2020-12-09 06:57:34,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:57:34,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:34,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:57:34,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:57:34,546 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2020-12-09 06:57:34,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:34,560 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-12-09 06:57:34,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 06:57:34,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-09 06:57:34,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:34,561 INFO L225 Difference]: With dead ends: 26 [2020-12-09 06:57:34,561 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 06:57:34,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:57:34,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 06:57:34,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-09 06:57:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 06:57:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-09 06:57:34,562 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2020-12-09 06:57:34,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:34,562 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-09 06:57:34,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:57:34,562 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-09 06:57:34,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 06:57:34,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:34,563 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:34,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301 [2020-12-09 06:57:34,563 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:34,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:34,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1889787036, now seen corresponding path program 1 times [2020-12-09 06:57:34,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:34,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543845743] [2020-12-09 06:57:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:34,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543845743] [2020-12-09 06:57:34,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832918705] [2020-12-09 06:57:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:34,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-09 06:57:34,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:34,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:37,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1956141838] [2020-12-09 06:57:37,444 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 06:57:37,444 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:57:37,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:57:37,444 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:57:37,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:57:37,963 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:57:38,157 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-12-09 06:57:39,056 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 121 [2020-12-09 06:57:39,224 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-09 06:57:39,434 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-12-09 06:57:39,689 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:57:39,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:57:39,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2020-12-09 06:57:39,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612819819] [2020-12-09 06:57:39,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-09 06:57:39,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:39,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-09 06:57:39,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=945, Unknown=4, NotChecked=0, Total=1056 [2020-12-09 06:57:39,690 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 20 states. [2020-12-09 06:57:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:39,953 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-09 06:57:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 06:57:39,953 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 17 [2020-12-09 06:57:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:39,954 INFO L225 Difference]: With dead ends: 34 [2020-12-09 06:57:39,954 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 06:57:39,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=201, Invalid=1355, Unknown=4, NotChecked=0, Total=1560 [2020-12-09 06:57:39,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 06:57:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-09 06:57:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 06:57:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-09 06:57:39,955 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-12-09 06:57:39,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:39,955 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-09 06:57:39,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-09 06:57:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-09 06:57:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 06:57:39,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:39,956 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:40,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2020-12-09 06:57:40,158 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:40,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:40,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1570930603, now seen corresponding path program 2 times [2020-12-09 06:57:40,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:40,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575988323] [2020-12-09 06:57:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:40,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575988323] [2020-12-09 06:57:40,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366561957] [2020-12-09 06:57:40,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:40,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 06:57:40,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:57:40,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-09 06:57:40,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:40,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 06:57:40,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 06:57:41,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [357819051] [2020-12-09 06:57:41,131 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 06:57:41,132 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:57:41,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:57:41,132 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:57:41,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:57:41,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:57:41,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:57:41,396 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:57:41,646 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:57:41,833 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-12-09 06:57:42,113 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-12-09 06:57:43,121 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 123 [2020-12-09 06:57:43,307 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-09 06:57:43,526 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-12-09 06:57:43,881 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:57:43,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:57:43,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 11] total 30 [2020-12-09 06:57:43,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43304419] [2020-12-09 06:57:43,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-09 06:57:43,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:43,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-09 06:57:43,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1716, Unknown=0, NotChecked=0, Total=1980 [2020-12-09 06:57:43,883 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 32 states. [2020-12-09 06:57:44,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:44,960 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-12-09 06:57:44,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-09 06:57:44,960 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 19 [2020-12-09 06:57:44,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:44,960 INFO L225 Difference]: With dead ends: 61 [2020-12-09 06:57:44,960 INFO L226 Difference]: Without dead ends: 61 [2020-12-09 06:57:44,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=668, Invalid=3364, Unknown=0, NotChecked=0, Total=4032 [2020-12-09 06:57:44,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-09 06:57:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 31. [2020-12-09 06:57:44,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 06:57:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-09 06:57:44,965 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 19 [2020-12-09 06:57:44,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:44,965 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-09 06:57:44,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-09 06:57:44,965 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-09 06:57:44,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 06:57:44,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:44,966 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:45,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:45,167 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:45,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:45,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1454122520, now seen corresponding path program 1 times [2020-12-09 06:57:45,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:45,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310838782] [2020-12-09 06:57:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:57:45,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310838782] [2020-12-09 06:57:45,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479112271] [2020-12-09 06:57:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:45,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-09 06:57:45,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:57:45,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:57:45,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [289466541] [2020-12-09 06:57:45,462 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 06:57:45,462 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:57:45,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:57:45,462 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:57:45,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:57:45,940 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:57:46,143 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-12-09 06:57:46,850 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-12-09 06:57:47,043 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-12-09 06:57:47,308 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-12-09 06:57:47,676 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 124 [2020-12-09 06:57:47,882 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-12-09 06:57:48,130 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-12-09 06:57:48,200 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:57:48,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:57:48,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 16 [2020-12-09 06:57:48,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132224402] [2020-12-09 06:57:48,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 06:57:48,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:48,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 06:57:48,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2020-12-09 06:57:48,202 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 16 states. [2020-12-09 06:57:48,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:48,531 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-12-09 06:57:48,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-09 06:57:48,531 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-09 06:57:48,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:48,532 INFO L225 Difference]: With dead ends: 55 [2020-12-09 06:57:48,532 INFO L226 Difference]: Without dead ends: 55 [2020-12-09 06:57:48,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2020-12-09 06:57:48,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-09 06:57:48,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-12-09 06:57:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 06:57:48,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-12-09 06:57:48,535 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 20 [2020-12-09 06:57:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:48,535 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-12-09 06:57:48,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 06:57:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-12-09 06:57:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 06:57:48,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:48,536 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:48,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:48,736 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:48,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:48,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1628674483, now seen corresponding path program 1 times [2020-12-09 06:57:48,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:48,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952850981] [2020-12-09 06:57:48,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 06:57:48,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952850981] [2020-12-09 06:57:48,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793873588] [2020-12-09 06:57:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:48,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-09 06:57:48,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 06:57:48,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 06:57:48,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [43691091] [2020-12-09 06:57:48,938 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 06:57:48,938 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:57:48,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:57:48,938 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:57:48,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:57:49,433 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:57:50,358 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 121 [2020-12-09 06:57:50,519 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-09 06:57:50,720 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-12-09 06:57:50,959 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:57:50,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:57:50,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2020-12-09 06:57:50,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47646980] [2020-12-09 06:57:50,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 06:57:50,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:50,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 06:57:50,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2020-12-09 06:57:50,960 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 15 states. [2020-12-09 06:57:51,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:51,139 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-12-09 06:57:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 06:57:51,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2020-12-09 06:57:51,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:51,140 INFO L225 Difference]: With dead ends: 53 [2020-12-09 06:57:51,140 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 06:57:51,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2020-12-09 06:57:51,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 06:57:51,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-12-09 06:57:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-09 06:57:51,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-12-09 06:57:51,143 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 22 [2020-12-09 06:57:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:51,143 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-12-09 06:57:51,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 06:57:51,143 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-12-09 06:57:51,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 06:57:51,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:51,144 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:51,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:51,345 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:51,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:51,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2069322420, now seen corresponding path program 2 times [2020-12-09 06:57:51,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:51,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416030617] [2020-12-09 06:57:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:57:51,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416030617] [2020-12-09 06:57:51,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88521929] [2020-12-09 06:57:51,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/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 [2020-12-09 06:57:51,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 06:57:51,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:57:51,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-09 06:57:51,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-09 06:57:51,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-09 06:57:51,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1862332782] [2020-12-09 06:57:51,912 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 06:57:51,912 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:57:51,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:57:51,912 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:57:51,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:57:52,424 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:57:52,618 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-12-09 06:57:53,456 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-12-09 06:57:53,684 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-12-09 06:57:53,980 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-12-09 06:57:54,388 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 125 [2020-12-09 06:57:54,592 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-12-09 06:57:54,832 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-12-09 06:57:54,935 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:57:54,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:57:54,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 22 [2020-12-09 06:57:54,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503633850] [2020-12-09 06:57:54,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-09 06:57:54,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:54,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-09 06:57:54,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2020-12-09 06:57:54,937 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 24 states. [2020-12-09 06:57:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:55,655 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-12-09 06:57:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-09 06:57:55,656 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 22 [2020-12-09 06:57:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:55,656 INFO L225 Difference]: With dead ends: 68 [2020-12-09 06:57:55,656 INFO L226 Difference]: Without dead ends: 68 [2020-12-09 06:57:55,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=339, Invalid=2211, Unknown=0, NotChecked=0, Total=2550 [2020-12-09 06:57:55,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-09 06:57:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2020-12-09 06:57:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-09 06:57:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-12-09 06:57:55,659 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 22 [2020-12-09 06:57:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:55,659 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-12-09 06:57:55,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-09 06:57:55,659 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-12-09 06:57:55,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 06:57:55,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:55,660 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:55,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:55,861 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:57:55,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:55,862 INFO L82 PathProgramCache]: Analyzing trace with hash 405083751, now seen corresponding path program 3 times [2020-12-09 06:57:55,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:55,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120902389] [2020-12-09 06:57:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:57:56,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120902389] [2020-12-09 06:57:56,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272355676] [2020-12-09 06:57:56,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:56,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 06:57:56,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:57:56,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-09 06:57:56,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:56,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:57,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [658998955] [2020-12-09 06:57:57,309 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 06:57:57,309 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:57:57,309 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:57:57,309 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:57:57,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:57:57,791 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:57:58,008 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-12-09 06:57:59,233 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 121 [2020-12-09 06:57:59,460 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-09 06:57:59,725 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-12-09 06:58:00,127 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:58:00,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:58:00,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 15] total 39 [2020-12-09 06:58:00,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146401400] [2020-12-09 06:58:00,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-09 06:58:00,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:58:00,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-09 06:58:00,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2523, Unknown=0, NotChecked=0, Total=2756 [2020-12-09 06:58:00,129 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 40 states. [2020-12-09 06:58:01,202 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 06:58:01,415 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-12-09 06:58:01,666 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-12-09 06:58:02,005 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-12-09 06:58:02,174 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 06:58:02,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:58:02,347 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2020-12-09 06:58:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-09 06:58:02,347 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 25 [2020-12-09 06:58:02,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:58:02,348 INFO L225 Difference]: With dead ends: 98 [2020-12-09 06:58:02,348 INFO L226 Difference]: Without dead ends: 84 [2020-12-09 06:58:02,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=770, Invalid=5082, Unknown=0, NotChecked=0, Total=5852 [2020-12-09 06:58:02,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-09 06:58:02,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-12-09 06:58:02,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-09 06:58:02,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-12-09 06:58:02,352 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 25 [2020-12-09 06:58:02,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:58:02,352 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-12-09 06:58:02,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-09 06:58:02,352 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-12-09 06:58:02,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 06:58:02,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:58:02,353 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:58:02,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2020-12-09 06:58:02,554 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:58:02,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:58:02,554 INFO L82 PathProgramCache]: Analyzing trace with hash 200650133, now seen corresponding path program 3 times [2020-12-09 06:58:02,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:58:02,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362586128] [2020-12-09 06:58:02,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:58:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:58:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:58:02,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362586128] [2020-12-09 06:58:02,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444340009] [2020-12-09 06:58:02,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:58:02,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 06:58:02,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:58:02,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-09 06:58:02,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:58:03,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:58:03,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:58:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:58:03,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [486331164] [2020-12-09 06:58:03,439 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 06:58:03,439 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:58:03,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:58:03,439 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:58:03,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:58:03,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:58:03,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:58:03,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:58:03,975 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:58:04,197 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-12-09 06:58:04,546 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-12-09 06:58:05,368 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-12-09 06:58:05,619 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-12-09 06:58:05,922 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-12-09 06:58:06,430 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 124 [2020-12-09 06:58:06,664 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-12-09 06:58:06,934 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-12-09 06:58:07,040 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:58:07,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:58:07,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2020-12-09 06:58:07,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494776007] [2020-12-09 06:58:07,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-09 06:58:07,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:58:07,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-09 06:58:07,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2142, Unknown=0, NotChecked=0, Total=2352 [2020-12-09 06:58:07,041 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 35 states. [2020-12-09 06:58:08,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:58:08,615 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2020-12-09 06:58:08,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-09 06:58:08,615 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 26 [2020-12-09 06:58:08,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:58:08,616 INFO L225 Difference]: With dead ends: 131 [2020-12-09 06:58:08,616 INFO L226 Difference]: Without dead ends: 119 [2020-12-09 06:58:08,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=696, Invalid=4706, Unknown=0, NotChecked=0, Total=5402 [2020-12-09 06:58:08,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-09 06:58:08,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2020-12-09 06:58:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-09 06:58:08,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2020-12-09 06:58:08,620 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 26 [2020-12-09 06:58:08,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:58:08,620 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2020-12-09 06:58:08,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-09 06:58:08,621 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2020-12-09 06:58:08,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 06:58:08,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:58:08,621 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:58:08,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable650,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:58:08,823 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:58:08,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:58:08,824 INFO L82 PathProgramCache]: Analyzing trace with hash 956297504, now seen corresponding path program 4 times [2020-12-09 06:58:08,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:58:08,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521716493] [2020-12-09 06:58:08,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:58:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:58:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:58:08,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521716493] [2020-12-09 06:58:08,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602959232] [2020-12-09 06:58:08,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:58:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:58:08,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-09 06:58:08,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:58:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:58:09,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:58:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:58:09,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [180647909] [2020-12-09 06:58:09,411 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 06:58:09,411 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:58:09,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:58:09,411 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:58:09,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:58:09,924 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:58:10,113 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-12-09 06:58:11,180 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 121 [2020-12-09 06:58:11,390 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-09 06:58:11,636 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-12-09 06:58:11,968 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:58:11,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:58:11,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2020-12-09 06:58:11,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563010489] [2020-12-09 06:58:11,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-09 06:58:11,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:58:11,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-09 06:58:11,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2020-12-09 06:58:11,969 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand 29 states. [2020-12-09 06:58:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:58:12,488 INFO L93 Difference]: Finished difference Result 144 states and 161 transitions. [2020-12-09 06:58:12,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-09 06:58:12,488 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 27 [2020-12-09 06:58:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:58:12,489 INFO L225 Difference]: With dead ends: 144 [2020-12-09 06:58:12,489 INFO L226 Difference]: Without dead ends: 144 [2020-12-09 06:58:12,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=374, Invalid=2488, Unknown=0, NotChecked=0, Total=2862 [2020-12-09 06:58:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-09 06:58:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2020-12-09 06:58:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-09 06:58:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 158 transitions. [2020-12-09 06:58:12,494 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 158 transitions. Word has length 27 [2020-12-09 06:58:12,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:58:12,494 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 158 transitions. [2020-12-09 06:58:12,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-09 06:58:12,494 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 158 transitions. [2020-12-09 06:58:12,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 06:58:12,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:58:12,495 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:58:12,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable704 [2020-12-09 06:58:12,697 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:58:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:58:12,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1396006393, now seen corresponding path program 4 times [2020-12-09 06:58:12,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:58:12,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023580281] [2020-12-09 06:58:12,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:58:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:58:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:58:12,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023580281] [2020-12-09 06:58:12,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027234395] [2020-12-09 06:58:12,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:58:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:58:12,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-09 06:58:12,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:58:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:58:13,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:58:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:58:13,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1054384955] [2020-12-09 06:58:13,183 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 06:58:13,183 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:58:13,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:58:13,183 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:58:13,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:58:13,741 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:58:13,938 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-12-09 06:58:14,734 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-12-09 06:58:14,957 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-12-09 06:58:15,249 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-12-09 06:58:15,689 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 125 [2020-12-09 06:58:15,894 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-12-09 06:58:16,140 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-12-09 06:58:16,232 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:58:16,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:58:16,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2020-12-09 06:58:16,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051423438] [2020-12-09 06:58:16,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-09 06:58:16,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:58:16,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-09 06:58:16,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2020-12-09 06:58:16,234 INFO L87 Difference]: Start difference. First operand 138 states and 158 transitions. Second operand 27 states. [2020-12-09 06:58:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:58:16,726 INFO L93 Difference]: Finished difference Result 178 states and 202 transitions. [2020-12-09 06:58:16,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-09 06:58:16,727 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2020-12-09 06:58:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:58:16,729 INFO L225 Difference]: With dead ends: 178 [2020-12-09 06:58:16,729 INFO L226 Difference]: Without dead ends: 178 [2020-12-09 06:58:16,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=366, Invalid=2286, Unknown=0, NotChecked=0, Total=2652 [2020-12-09 06:58:16,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-09 06:58:16,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 154. [2020-12-09 06:58:16,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-09 06:58:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 177 transitions. [2020-12-09 06:58:16,733 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 177 transitions. Word has length 28 [2020-12-09 06:58:16,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:58:16,733 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 177 transitions. [2020-12-09 06:58:16,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-09 06:58:16,733 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 177 transitions. [2020-12-09 06:58:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-09 06:58:16,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:58:16,734 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:58:16,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2020-12-09 06:58:16,935 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:58:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:58:16,936 INFO L82 PathProgramCache]: Analyzing trace with hash -554940478, now seen corresponding path program 5 times [2020-12-09 06:58:16,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:58:16,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958746284] [2020-12-09 06:58:16,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:58:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:58:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:58:17,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958746284] [2020-12-09 06:58:17,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239713669] [2020-12-09 06:58:17,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:58:17,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-09 06:58:17,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:58:17,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-09 06:58:17,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:58:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:58:17,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:58:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:58:17,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639369380] [2020-12-09 06:58:17,717 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 06:58:17,717 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:58:17,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:58:17,717 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:58:17,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:58:18,207 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:58:18,421 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-12-09 06:58:19,302 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-12-09 06:58:19,566 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-12-09 06:58:19,883 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-12-09 06:58:20,335 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 124 [2020-12-09 06:58:20,572 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-12-09 06:58:20,845 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-12-09 06:58:20,947 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:58:20,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:58:20,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 31 [2020-12-09 06:58:20,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117235552] [2020-12-09 06:58:20,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-09 06:58:20,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:58:20,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-09 06:58:20,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1794, Unknown=0, NotChecked=0, Total=1980 [2020-12-09 06:58:20,949 INFO L87 Difference]: Start difference. First operand 154 states and 177 transitions. Second operand 31 states. [2020-12-09 06:58:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:58:22,446 INFO L93 Difference]: Finished difference Result 243 states and 271 transitions. [2020-12-09 06:58:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-09 06:58:22,447 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 32 [2020-12-09 06:58:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:58:22,448 INFO L225 Difference]: With dead ends: 243 [2020-12-09 06:58:22,448 INFO L226 Difference]: Without dead ends: 227 [2020-12-09 06:58:22,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=636, Invalid=4620, Unknown=0, NotChecked=0, Total=5256 [2020-12-09 06:58:22,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-09 06:58:22,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 204. [2020-12-09 06:58:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-09 06:58:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 235 transitions. [2020-12-09 06:58:22,454 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 235 transitions. Word has length 32 [2020-12-09 06:58:22,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:58:22,454 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 235 transitions. [2020-12-09 06:58:22,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-09 06:58:22,454 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 235 transitions. [2020-12-09 06:58:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-09 06:58:22,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:58:22,454 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:58:22,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable825 [2020-12-09 06:58:22,656 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:58:22,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:58:22,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1506050802, now seen corresponding path program 5 times [2020-12-09 06:58:22,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:58:22,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6552756] [2020-12-09 06:58:22,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:58:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:58:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:58:22,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6552756] [2020-12-09 06:58:22,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065910605] [2020-12-09 06:58:22,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:58:22,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-09 06:58:22,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:58:22,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-09 06:58:22,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:58:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:58:23,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:58:25,012 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~nondetString2~0.offset Int)) (= (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~nondetString2~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~nondetString2~0.base) (+ c_ULTIMATE.start_main_~length2~0 ULTIMATE.start_main_~nondetString2~0.offset (- 1)) 0)) c_ULTIMATE.start_main_~nondetString1~0.base) (+ c_ULTIMATE.start_main_~nondetString1~0.offset 2)) 0)) is different from false [2020-12-09 06:58:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:58:25,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1723423869] [2020-12-09 06:58:25,167 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 06:58:25,167 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:58:25,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:58:25,168 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:58:25,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:58:25,698 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:58:25,896 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-12-09 06:58:27,081 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 123 [2020-12-09 06:58:27,304 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-09 06:58:27,545 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-12-09 06:58:27,944 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:58:27,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:58:27,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2020-12-09 06:58:27,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188842857] [2020-12-09 06:58:27,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-09 06:58:27,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:58:27,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-09 06:58:27,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1585, Unknown=1, NotChecked=80, Total=1806 [2020-12-09 06:58:27,946 INFO L87 Difference]: Start difference. First operand 204 states and 235 transitions. Second operand 30 states. [2020-12-09 06:58:29,484 WARN L197 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-12-09 06:58:29,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:58:29,942 INFO L93 Difference]: Finished difference Result 333 states and 376 transitions. [2020-12-09 06:58:29,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-09 06:58:29,943 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-12-09 06:58:29,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:58:29,944 INFO L225 Difference]: With dead ends: 333 [2020-12-09 06:58:29,944 INFO L226 Difference]: Without dead ends: 255 [2020-12-09 06:58:29,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=295, Invalid=2570, Unknown=1, NotChecked=104, Total=2970 [2020-12-09 06:58:29,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-12-09 06:58:29,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 234. [2020-12-09 06:58:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-12-09 06:58:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 271 transitions. [2020-12-09 06:58:29,949 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 271 transitions. Word has length 33 [2020-12-09 06:58:29,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:58:29,949 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 271 transitions. [2020-12-09 06:58:29,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-09 06:58:29,949 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 271 transitions. [2020-12-09 06:58:29,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-09 06:58:29,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:58:29,950 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:58:30,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2020-12-09 06:58:30,151 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:58:30,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:58:30,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1838619942, now seen corresponding path program 6 times [2020-12-09 06:58:30,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:58:30,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181227712] [2020-12-09 06:58:30,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:58:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:58:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:58:30,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181227712] [2020-12-09 06:58:30,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209108438] [2020-12-09 06:58:30,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:58:30,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 06:58:30,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:58:30,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-09 06:58:30,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:58:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:58:30,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:58:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:58:30,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [100814609] [2020-12-09 06:58:30,771 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 06:58:30,771 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:58:30,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:58:30,771 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:58:30,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:58:31,285 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:58:31,494 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-12-09 06:58:32,322 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-12-09 06:58:32,572 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-12-09 06:58:32,872 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-12-09 06:58:33,324 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 124 [2020-12-09 06:58:33,577 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-12-09 06:58:33,878 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-12-09 06:58:33,980 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:58:33,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:58:33,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2020-12-09 06:58:33,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277282490] [2020-12-09 06:58:33,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-09 06:58:33,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:58:33,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-09 06:58:33,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1784, Unknown=0, NotChecked=0, Total=1980 [2020-12-09 06:58:33,981 INFO L87 Difference]: Start difference. First operand 234 states and 271 transitions. Second operand 31 states. [2020-12-09 06:58:34,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:58:34,811 INFO L93 Difference]: Finished difference Result 298 states and 340 transitions. [2020-12-09 06:58:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-09 06:58:34,812 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-12-09 06:58:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:58:34,813 INFO L225 Difference]: With dead ends: 298 [2020-12-09 06:58:34,813 INFO L226 Difference]: Without dead ends: 298 [2020-12-09 06:58:34,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=475, Invalid=2947, Unknown=0, NotChecked=0, Total=3422 [2020-12-09 06:58:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-12-09 06:58:34,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 254. [2020-12-09 06:58:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-12-09 06:58:34,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 295 transitions. [2020-12-09 06:58:34,818 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 295 transitions. Word has length 34 [2020-12-09 06:58:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:58:34,818 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 295 transitions. [2020-12-09 06:58:34,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-09 06:58:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 295 transitions. [2020-12-09 06:58:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-09 06:58:34,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:58:34,819 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:58:35,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2020-12-09 06:58:35,020 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:58:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:58:35,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1822004395, now seen corresponding path program 6 times [2020-12-09 06:58:35,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:58:35,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69243622] [2020-12-09 06:58:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:58:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:58:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:58:35,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69243622] [2020-12-09 06:58:35,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701704800] [2020-12-09 06:58:35,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:58:35,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 06:58:35,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:58:35,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-09 06:58:35,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:58:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:58:35,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:58:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:58:35,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485800944] [2020-12-09 06:58:35,593 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 06:58:35,593 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:58:35,593 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:58:35,594 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:58:35,594 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:58:36,133 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:58:36,337 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-12-09 06:58:37,455 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 121 [2020-12-09 06:58:37,678 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-09 06:58:37,933 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-12-09 06:58:38,245 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:58:38,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:58:38,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2020-12-09 06:58:38,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477574164] [2020-12-09 06:58:38,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-09 06:58:38,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:58:38,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-09 06:58:38,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1376, Unknown=0, NotChecked=0, Total=1560 [2020-12-09 06:58:38,246 INFO L87 Difference]: Start difference. First operand 254 states and 295 transitions. Second operand 27 states. [2020-12-09 06:58:38,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:58:38,713 INFO L93 Difference]: Finished difference Result 336 states and 381 transitions. [2020-12-09 06:58:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-09 06:58:38,713 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-12-09 06:58:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:58:38,715 INFO L225 Difference]: With dead ends: 336 [2020-12-09 06:58:38,715 INFO L226 Difference]: Without dead ends: 336 [2020-12-09 06:58:38,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=384, Invalid=2268, Unknown=0, NotChecked=0, Total=2652 [2020-12-09 06:58:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-12-09 06:58:38,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 305. [2020-12-09 06:58:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-12-09 06:58:38,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 354 transitions. [2020-12-09 06:58:38,720 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 354 transitions. Word has length 35 [2020-12-09 06:58:38,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:58:38,720 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 354 transitions. [2020-12-09 06:58:38,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-09 06:58:38,720 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 354 transitions. [2020-12-09 06:58:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-09 06:58:38,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:58:38,721 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:58:38,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable999 [2020-12-09 06:58:38,922 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:58:38,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:58:38,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1724950639, now seen corresponding path program 7 times [2020-12-09 06:58:38,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:58:38,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141390054] [2020-12-09 06:58:38,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:58:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:58:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:58:39,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141390054] [2020-12-09 06:58:39,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376173532] [2020-12-09 06:58:39,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:58:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:58:39,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-09 06:58:39,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:58:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:58:39,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:58:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:58:39,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2047570688] [2020-12-09 06:58:39,659 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 06:58:39,659 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:58:39,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:58:39,659 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:58:39,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:58:40,214 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:58:40,464 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-12-09 06:58:41,410 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-12-09 06:58:41,663 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-12-09 06:58:42,013 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-12-09 06:58:42,535 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 124 [2020-12-09 06:58:42,799 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-12-09 06:58:43,125 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-12-09 06:58:43,243 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:58:43,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:58:43,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 31 [2020-12-09 06:58:43,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719099884] [2020-12-09 06:58:43,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-09 06:58:43,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:58:43,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-09 06:58:43,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2020-12-09 06:58:43,244 INFO L87 Difference]: Start difference. First operand 305 states and 354 transitions. Second operand 31 states. [2020-12-09 06:58:44,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:58:44,721 INFO L93 Difference]: Finished difference Result 489 states and 552 transitions. [2020-12-09 06:58:44,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-09 06:58:44,722 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2020-12-09 06:58:44,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:58:44,723 INFO L225 Difference]: With dead ends: 489 [2020-12-09 06:58:44,723 INFO L226 Difference]: Without dead ends: 435 [2020-12-09 06:58:44,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=606, Invalid=4796, Unknown=0, NotChecked=0, Total=5402 [2020-12-09 06:58:44,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-12-09 06:58:44,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 387. [2020-12-09 06:58:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-12-09 06:58:44,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 450 transitions. [2020-12-09 06:58:44,731 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 450 transitions. Word has length 38 [2020-12-09 06:58:44,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:58:44,731 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 450 transitions. [2020-12-09 06:58:44,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-09 06:58:44,731 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 450 transitions. [2020-12-09 06:58:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-09 06:58:44,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:58:44,731 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:58:44,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1061,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:58:44,933 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:58:44,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:58:44,934 INFO L82 PathProgramCache]: Analyzing trace with hash 121037523, now seen corresponding path program 8 times [2020-12-09 06:58:44,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:58:44,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217196722] [2020-12-09 06:58:44,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:58:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:58:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:58:45,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217196722] [2020-12-09 06:58:45,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190931614] [2020-12-09 06:58:45,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:58:45,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-09 06:58:45,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:58:45,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-09 06:58:45,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:58:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-09 06:58:45,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:58:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-09 06:58:46,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [200228960] [2020-12-09 06:58:46,012 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 06:58:46,012 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:58:46,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:58:46,012 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:58:46,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:58:46,522 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:58:46,769 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-12-09 06:58:47,785 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-12-09 06:58:48,069 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-12-09 06:58:48,399 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-12-09 06:58:48,973 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 124 [2020-12-09 06:58:49,245 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-12-09 06:58:49,543 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-12-09 06:58:49,661 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:58:49,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:58:49,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 11] total 34 [2020-12-09 06:58:49,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782738086] [2020-12-09 06:58:49,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-09 06:58:49,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:58:49,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-09 06:58:49,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=2203, Unknown=0, NotChecked=0, Total=2450 [2020-12-09 06:58:49,662 INFO L87 Difference]: Start difference. First operand 387 states and 450 transitions. Second operand 36 states. [2020-12-09 06:58:52,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:58:52,659 INFO L93 Difference]: Finished difference Result 459 states and 518 transitions. [2020-12-09 06:58:52,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-09 06:58:52,660 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-12-09 06:58:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:58:52,661 INFO L225 Difference]: With dead ends: 459 [2020-12-09 06:58:52,661 INFO L226 Difference]: Without dead ends: 374 [2020-12-09 06:58:52,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2315 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1868, Invalid=8434, Unknown=0, NotChecked=0, Total=10302 [2020-12-09 06:58:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-12-09 06:58:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 262. [2020-12-09 06:58:52,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-09 06:58:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 300 transitions. [2020-12-09 06:58:52,667 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 300 transitions. Word has length 40 [2020-12-09 06:58:52,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:58:52,668 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 300 transitions. [2020-12-09 06:58:52,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-09 06:58:52,668 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 300 transitions. [2020-12-09 06:58:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-09 06:58:52,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:58:52,668 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:58:52,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1124,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:58:52,869 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:58:52,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:58:52,870 INFO L82 PathProgramCache]: Analyzing trace with hash 123343421, now seen corresponding path program 7 times [2020-12-09 06:58:52,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:58:52,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347042958] [2020-12-09 06:58:52,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:58:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:58:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:58:53,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347042958] [2020-12-09 06:58:53,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089811439] [2020-12-09 06:58:53,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:58:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:58:53,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-09 06:58:53,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:58:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:58:53,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:58:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:58:54,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [544793743] [2020-12-09 06:58:54,811 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 06:58:54,811 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:58:54,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:58:54,812 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:58:54,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:58:55,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:58:55,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:58:55,130 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:58:55,396 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:58:55,655 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-12-09 06:58:56,078 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-12-09 06:58:57,375 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 121 [2020-12-09 06:58:57,646 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-09 06:58:57,944 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-12-09 06:58:58,470 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:58:58,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:58:58,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2020-12-09 06:58:58,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648426005] [2020-12-09 06:58:58,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-09 06:58:58,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:58:58,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-09 06:58:58,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2696, Unknown=0, NotChecked=0, Total=2862 [2020-12-09 06:58:58,471 INFO L87 Difference]: Start difference. First operand 262 states and 300 transitions. Second operand 41 states. [2020-12-09 06:58:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:58:59,879 INFO L93 Difference]: Finished difference Result 466 states and 526 transitions. [2020-12-09 06:58:59,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-09 06:58:59,880 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2020-12-09 06:58:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:58:59,881 INFO L225 Difference]: With dead ends: 466 [2020-12-09 06:58:59,881 INFO L226 Difference]: Without dead ends: 265 [2020-12-09 06:58:59,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=370, Invalid=4322, Unknown=0, NotChecked=0, Total=4692 [2020-12-09 06:58:59,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-09 06:58:59,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2020-12-09 06:58:59,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-12-09 06:58:59,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 302 transitions. [2020-12-09 06:58:59,886 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 302 transitions. Word has length 41 [2020-12-09 06:58:59,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:58:59,886 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 302 transitions. [2020-12-09 06:58:59,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-09 06:58:59,886 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 302 transitions. [2020-12-09 06:58:59,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-09 06:58:59,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:58:59,887 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:59:00,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1182,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:59:00,087 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 06:59:00,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:59:00,087 INFO L82 PathProgramCache]: Analyzing trace with hash 637688566, now seen corresponding path program 8 times [2020-12-09 06:59:00,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:59:00,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374274831] [2020-12-09 06:59:00,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:59:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:59:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:59:00,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374274831] [2020-12-09 06:59:00,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878585631] [2020-12-09 06:59:00,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:59:00,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-09 06:59:00,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:59:00,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-09 06:59:00,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:59:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-09 06:59:00,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:59:01,429 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-09 06:59:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-09 06:59:01,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [581512615] [2020-12-09 06:59:01,737 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 06:59:01,737 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:59:01,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:59:01,738 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:59:01,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:59:02,249 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:59:02,495 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-12-09 06:59:03,972 WARN L197 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 123 [2020-12-09 06:59:04,251 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-09 06:59:04,559 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-12-09 06:59:04,999 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:59:04,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:59:04,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 34 [2020-12-09 06:59:04,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488118810] [2020-12-09 06:59:04,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-09 06:59:04,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:59:04,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-09 06:59:04,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2151, Unknown=0, NotChecked=0, Total=2352 [2020-12-09 06:59:05,000 INFO L87 Difference]: Start difference. First operand 264 states and 302 transitions. Second operand 36 states. [2020-12-09 06:59:06,893 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2020-12-09 06:59:07,114 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 06:59:07,907 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-12-09 06:59:08,089 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 06:59:08,813 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-12-09 06:59:09,006 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-12-09 06:59:09,893 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-12-09 06:59:10,199 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-12-09 06:59:10,498 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-09 06:59:11,024 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-12-09 06:59:11,314 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-09 06:59:11,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:59:11,322 INFO L93 Difference]: Finished difference Result 317 states and 358 transitions. [2020-12-09 06:59:11,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-09 06:59:11,323 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2020-12-09 06:59:11,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:59:11,323 INFO L225 Difference]: With dead ends: 317 [2020-12-09 06:59:11,323 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 06:59:11,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1291, Invalid=6541, Unknown=0, NotChecked=0, Total=7832 [2020-12-09 06:59:11,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 06:59:11,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 06:59:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 06:59:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 06:59:11,324 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2020-12-09 06:59:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:59:11,324 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 06:59:11,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-09 06:59:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 06:59:11,324 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 06:59:11,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1236,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:59:11,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:59:11 BoogieIcfgContainer [2020-12-09 06:59:11,532 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 06:59:11,533 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 06:59:11,533 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 06:59:11,533 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 06:59:11,534 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:57:18" (3/4) ... [2020-12-09 06:59:11,537 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 06:59:11,546 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-12-09 06:59:11,547 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-09 06:59:11,547 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 06:59:11,575 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c956799f-1424-41a3-ab68-98705feb10b7/bin/utaipan/witness.graphml [2020-12-09 06:59:11,575 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 06:59:11,576 INFO L168 Benchmark]: Toolchain (without parser) took 113499.52 ms. Allocated memory was 86.0 MB in the beginning and 151.0 MB in the end (delta: 65.0 MB). Free memory was 45.2 MB in the beginning and 58.8 MB in the end (delta: -13.7 MB). Peak memory consumption was 52.7 MB. Max. memory is 16.1 GB. [2020-12-09 06:59:11,576 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 86.0 MB. Free memory was 62.5 MB in the beginning and 62.4 MB in the end (delta: 115.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:59:11,576 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.32 ms. Allocated memory is still 86.0 MB. Free memory was 44.9 MB in the beginning and 46.2 MB in the end (delta: -1.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2020-12-09 06:59:11,576 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.21 ms. Allocated memory is still 86.0 MB. Free memory was 45.9 MB in the beginning and 44.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:59:11,576 INFO L168 Benchmark]: Boogie Preprocessor took 21.60 ms. Allocated memory is still 86.0 MB. Free memory was 44.1 MB in the beginning and 42.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:59:11,576 INFO L168 Benchmark]: RCFGBuilder took 386.56 ms. Allocated memory is still 86.0 MB. Free memory was 42.6 MB in the beginning and 36.0 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2020-12-09 06:59:11,577 INFO L168 Benchmark]: TraceAbstraction took 112661.80 ms. Allocated memory was 86.0 MB in the beginning and 151.0 MB in the end (delta: 65.0 MB). Free memory was 35.6 MB in the beginning and 61.6 MB in the end (delta: -26.0 MB). Peak memory consumption was 41.4 MB. Max. memory is 16.1 GB. [2020-12-09 06:59:11,577 INFO L168 Benchmark]: Witness Printer took 42.27 ms. Allocated memory is still 151.0 MB. Free memory was 61.6 MB in the beginning and 58.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:59:11,577 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 86.0 MB. Free memory was 62.5 MB in the beginning and 62.4 MB in the end (delta: 115.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 342.32 ms. Allocated memory is still 86.0 MB. Free memory was 44.9 MB in the beginning and 46.2 MB in the end (delta: -1.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.21 ms. Allocated memory is still 86.0 MB. Free memory was 45.9 MB in the beginning and 44.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.60 ms. Allocated memory is still 86.0 MB. Free memory was 44.1 MB in the beginning and 42.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 386.56 ms. Allocated memory is still 86.0 MB. Free memory was 42.6 MB in the beginning and 36.0 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 112661.80 ms. Allocated memory was 86.0 MB in the beginning and 151.0 MB in the end (delta: 65.0 MB). Free memory was 35.6 MB in the beginning and 61.6 MB in the end (delta: -26.0 MB). Peak memory consumption was 41.4 MB. Max. memory is 16.1 GB. * Witness Printer took 42.27 ms. Allocated memory is still 151.0 MB. Free memory was 61.6 MB in the beginning and 58.8 MB in the end (delta: 2.8 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: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 112.6s, OverallIterations: 31, TraceHistogramMax: 5, AutomataDifference: 27.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 567 SDtfs, 4635 SDslu, 4323 SDs, 0 SdLazy, 8440 SolverSat, 1155 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2250 GetRequests, 1044 SyntacticMatches, 19 SemanticMatches, 1187 ConstructedPredicates, 1 IntricatePredicates, 4 DeprecatedPredicates, 16910 ImplicationChecksByTransitivity, 83.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=387occurred in iteration=28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 31 MinimizatonAttempts, 383 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 18.2s InterpolantComputationTime, 1184 NumberOfCodeBlocks, 1167 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 1668 ConstructedInterpolants, 115 QuantifiedInterpolants, 647405 SizeOfPredicates, 379 NumberOfNonLiveVariables, 3839 ConjunctsInSsa, 879 ConjunctsInUnsatCore, 79 InterpolantComputations, 7 PerfectInterpolantSequences, 630/1544 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]: 1411, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 29, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 55, TOOLS_POST_TIME[ms]: 927, 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: 55, TOOLS_QUANTIFIERELIM_TIME[ms]: 915, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 185, FLUID_QUERY_TIME[ms]: 2, FLUID_QUERIES: 116, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 8, DOMAIN_JOIN_TIME[ms]: 186, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 8, DOMAIN_WIDEN_TIME[ms]: 211, DOMAIN_ISSUBSETEQ_APPLICATIONS: 13, DOMAIN_ISSUBSETEQ_TIME[ms]: 27, DOMAIN_ISBOTTOM_APPLICATIONS: 29, DOMAIN_ISBOTTOM_TIME[ms]: 42, LOOP_SUMMARIZER_APPLICATIONS: 5, LOOP_SUMMARIZER_CACHE_MISSES: 5, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 612, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 612, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 13, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 0, PATH_EXPR_TIME[ms]: 1, REGEX_TO_DAG_TIME[ms]: 0, DAG_COMPRESSION_TIME[ms]: 7, DAG_COMPRESSION_PROCESSED_NODES: 392, DAG_COMPRESSION_RETAINED_NODES: 91, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...