./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0019-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8e460117-17a1-4425-92fb-dcce33184965/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8e460117-17a1-4425-92fb-dcce33184965/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8e460117-17a1-4425-92fb-dcce33184965/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8e460117-17a1-4425-92fb-dcce33184965/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0019-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_8e460117-17a1-4425-92fb-dcce33184965/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8e460117-17a1-4425-92fb-dcce33184965/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 c2707018625c82fb11b0c17a966b82b37a0c8e83 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:06:43,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:06:43,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:06:43,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:06:43,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:06:43,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:06:43,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:06:43,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:06:43,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:06:43,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:06:43,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:06:43,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:06:43,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:06:43,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:06:43,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:06:43,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:06:43,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:06:43,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:06:43,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:06:43,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:06:43,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:06:43,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:06:43,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:06:43,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:06:43,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:06:43,526 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:06:43,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:06:43,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:06:43,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:06:43,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:06:43,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:06:43,531 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:06:43,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:06:43,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:06:43,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:06:43,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:06:43,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:06:43,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:06:43,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:06:43,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:06:43,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:06:43,539 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8e460117-17a1-4425-92fb-dcce33184965/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-22 13:06:43,563 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:06:43,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:06:43,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:06:43,564 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:06:43,564 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:06:43,565 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:06:43,565 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:06:43,565 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:06:43,566 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:06:43,566 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:06:43,566 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:06:43,566 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:06:43,567 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:06:43,567 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:06:43,567 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:06:43,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-22 13:06:43,568 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-22 13:06:43,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:06:43,569 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:06:43,569 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 13:06:43,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:06:43,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:06:43,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:06:43,570 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-22 13:06:43,570 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-22 13:06:43,571 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-22 13:06:43,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:06:43,571 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:06:43,571 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:06:43,572 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:06:43,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:06:43,572 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:06:43,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:06:43,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:06:43,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:06:43,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:06:43,573 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:06:43,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:06:43,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:06:43,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:06:43,574 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_8e460117-17a1-4425-92fb-dcce33184965/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8e460117-17a1-4425-92fb-dcce33184965/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2707018625c82fb11b0c17a966b82b37a0c8e83 [2020-11-22 13:06:43,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:06:43,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:06:43,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:06:43,850 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:06:43,851 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:06:43,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8e460117-17a1-4425-92fb-dcce33184965/bin/utaipan/../../sv-benchmarks/c/memsafety/test-0019-1.i [2020-11-22 13:06:43,924 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8e460117-17a1-4425-92fb-dcce33184965/bin/utaipan/data/e4afbbcb2/fb7ac0c69e604dcc8e6077478455ff8f/FLAG6879a7802 [2020-11-22 13:06:44,467 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:06:44,468 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8e460117-17a1-4425-92fb-dcce33184965/sv-benchmarks/c/memsafety/test-0019-1.i [2020-11-22 13:06:44,505 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8e460117-17a1-4425-92fb-dcce33184965/bin/utaipan/data/e4afbbcb2/fb7ac0c69e604dcc8e6077478455ff8f/FLAG6879a7802 [2020-11-22 13:06:44,751 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8e460117-17a1-4425-92fb-dcce33184965/bin/utaipan/data/e4afbbcb2/fb7ac0c69e604dcc8e6077478455ff8f [2020-11-22 13:06:44,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:06:44,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:06:44,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:44,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:06:44,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:06:44,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:44" (1/1) ... [2020-11-22 13:06:44,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e2703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:44, skipping insertion in model container [2020-11-22 13:06:44,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:44" (1/1) ... [2020-11-22 13:06:44,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:06:44,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:06:45,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:45,129 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:06:45,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:45,244 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:06:45,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:45 WrapperNode [2020-11-22 13:06:45,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:45,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:45,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:06:45,248 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:06:45,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:45" (1/1) ... [2020-11-22 13:06:45,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:45" (1/1) ... [2020-11-22 13:06:45,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:45,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:06:45,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:06:45,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:06:45,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:45" (1/1) ... [2020-11-22 13:06:45,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:45" (1/1) ... [2020-11-22 13:06:45,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:45" (1/1) ... [2020-11-22 13:06:45,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:45" (1/1) ... [2020-11-22 13:06:45,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:45" (1/1) ... [2020-11-22 13:06:45,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:45" (1/1) ... [2020-11-22 13:06:45,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:45" (1/1) ... [2020-11-22 13:06:45,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:06:45,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:06:45,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:06:45,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:06:45,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e460117-17a1-4425-92fb-dcce33184965/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 [2020-11-22 13:06:45,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-22 13:06:45,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-22 13:06:45,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:06:45,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-22 13:06:45,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:06:45,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:06:45,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:06:45,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:06:46,026 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:06:46,027 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-22 13:06:46,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:46 BoogieIcfgContainer [2020-11-22 13:06:46,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:06:46,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:06:46,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:06:46,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:06:46,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:06:44" (1/3) ... [2020-11-22 13:06:46,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@119f443f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:46, skipping insertion in model container [2020-11-22 13:06:46,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:45" (2/3) ... [2020-11-22 13:06:46,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@119f443f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:46, skipping insertion in model container [2020-11-22 13:06:46,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:46" (3/3) ... [2020-11-22 13:06:46,039 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0019-1.i [2020-11-22 13:06:46,049 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:06:46,054 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 23 error locations. [2020-11-22 13:06:46,065 INFO L253 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2020-11-22 13:06:46,095 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:06:46,096 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-22 13:06:46,096 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:06:46,096 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:06:46,096 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:06:46,096 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:06:46,097 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:06:46,097 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:06:46,113 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-11-22 13:06:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2020-11-22 13:06:46,121 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:46,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1] [2020-11-22 13:06:46,123 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:06:46,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:46,130 INFO L82 PathProgramCache]: Analyzing trace with hash 2670, now seen corresponding path program 1 times [2020-11-22 13:06:46,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:46,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168714077] [2020-11-22 13:06:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:46,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168714077] [2020-11-22 13:06:46,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:46,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 13:06:46,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091014239] [2020-11-22 13:06:46,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:06:46,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:46,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:06:46,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:46,363 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-11-22 13:06:46,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:46,452 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-11-22 13:06:46,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:06:46,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2020-11-22 13:06:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:46,462 INFO L225 Difference]: With dead ends: 40 [2020-11-22 13:06:46,462 INFO L226 Difference]: Without dead ends: 39 [2020-11-22 13:06:46,464 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 [2020-11-22 13:06:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-22 13:06:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-22 13:06:46,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-22 13:06:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-11-22 13:06:46,495 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 2 [2020-11-22 13:06:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:46,496 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-11-22 13:06:46,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:06:46,496 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-11-22 13:06:46,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2020-11-22 13:06:46,497 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:46,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1] [2020-11-22 13:06:46,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:06:46,498 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:06:46,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:46,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2671, now seen corresponding path program 1 times [2020-11-22 13:06:46,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:46,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193575321] [2020-11-22 13:06:46,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:46,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193575321] [2020-11-22 13:06:46,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:46,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 13:06:46,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779586552] [2020-11-22 13:06:46,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:06:46,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:46,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:06:46,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:46,553 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 3 states. [2020-11-22 13:06:46,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:46,606 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-11-22 13:06:46,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:06:46,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2020-11-22 13:06:46,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:46,609 INFO L225 Difference]: With dead ends: 37 [2020-11-22 13:06:46,609 INFO L226 Difference]: Without dead ends: 37 [2020-11-22 13:06:46,610 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 [2020-11-22 13:06:46,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-22 13:06:46,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-22 13:06:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-22 13:06:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-11-22 13:06:46,615 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 2 [2020-11-22 13:06:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:46,615 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-11-22 13:06:46,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:06:46,615 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-11-22 13:06:46,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:06:46,619 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:46,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:06:46,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:06:46,620 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:06:46,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:46,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2618954, now seen corresponding path program 1 times [2020-11-22 13:06:46,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:46,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145284754] [2020-11-22 13:06:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:46,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145284754] [2020-11-22 13:06:46,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:46,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:06:46,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315039265] [2020-11-22 13:06:46,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:06:46,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:46,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:06:46,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:06:46,695 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 4 states. [2020-11-22 13:06:46,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:46,782 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-11-22 13:06:46,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:06:46,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-22 13:06:46,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:46,783 INFO L225 Difference]: With dead ends: 35 [2020-11-22 13:06:46,783 INFO L226 Difference]: Without dead ends: 35 [2020-11-22 13:06:46,784 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 [2020-11-22 13:06:46,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-22 13:06:46,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-22 13:06:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:06:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-11-22 13:06:46,788 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 4 [2020-11-22 13:06:46,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:46,789 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-11-22 13:06:46,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:06:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-11-22 13:06:46,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:06:46,789 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:46,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:06:46,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:06:46,790 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:06:46,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:46,791 INFO L82 PathProgramCache]: Analyzing trace with hash 2618955, now seen corresponding path program 1 times [2020-11-22 13:06:46,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:46,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652183698] [2020-11-22 13:06:46,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:46,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652183698] [2020-11-22 13:06:46,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:46,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:06:46,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607583289] [2020-11-22 13:06:46,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:06:46,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:46,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:06:46,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:06:46,874 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 4 states. [2020-11-22 13:06:46,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:46,932 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-11-22 13:06:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:06:46,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-22 13:06:46,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:46,934 INFO L225 Difference]: With dead ends: 33 [2020-11-22 13:06:46,934 INFO L226 Difference]: Without dead ends: 33 [2020-11-22 13:06:46,935 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 [2020-11-22 13:06:46,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-22 13:06:46,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-22 13:06:46,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-22 13:06:46,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-11-22 13:06:46,939 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 4 [2020-11-22 13:06:46,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:46,939 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-11-22 13:06:46,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:06:46,939 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-11-22 13:06:46,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:06:46,940 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:46,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:06:46,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:06:46,940 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:06:46,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:46,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1778151584, now seen corresponding path program 1 times [2020-11-22 13:06:46,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:46,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952592907] [2020-11-22 13:06:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:47,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952592907] [2020-11-22 13:06:47,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:47,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:06:47,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748260661] [2020-11-22 13:06:47,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:06:47,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:47,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:06:47,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:47,013 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 3 states. [2020-11-22 13:06:47,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:47,071 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-11-22 13:06:47,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:06:47,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-22 13:06:47,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:47,073 INFO L225 Difference]: With dead ends: 29 [2020-11-22 13:06:47,073 INFO L226 Difference]: Without dead ends: 29 [2020-11-22 13:06:47,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:47,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-22 13:06:47,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-22 13:06:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-22 13:06:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-11-22 13:06:47,077 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 6 [2020-11-22 13:06:47,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:47,077 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-11-22 13:06:47,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:06:47,077 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-11-22 13:06:47,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:06:47,078 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:47,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:06:47,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:06:47,081 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:06:47,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:47,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1778151583, now seen corresponding path program 1 times [2020-11-22 13:06:47,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:47,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887998443] [2020-11-22 13:06:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:47,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887998443] [2020-11-22 13:06:47,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:47,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:06:47,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081816849] [2020-11-22 13:06:47,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:06:47,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:47,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:06:47,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:47,151 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 3 states. [2020-11-22 13:06:47,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:47,180 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-11-22 13:06:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:06:47,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-22 13:06:47,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:47,181 INFO L225 Difference]: With dead ends: 25 [2020-11-22 13:06:47,181 INFO L226 Difference]: Without dead ends: 25 [2020-11-22 13:06:47,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-22 13:06:47,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-22 13:06:47,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 13:06:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-11-22 13:06:47,185 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 6 [2020-11-22 13:06:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:47,185 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-11-22 13:06:47,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:06:47,186 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-11-22 13:06:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:06:47,186 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:47,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:47,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 13:06:47,187 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:06:47,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:47,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1547493750, now seen corresponding path program 1 times [2020-11-22 13:06:47,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:47,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448199842] [2020-11-22 13:06:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:47,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448199842] [2020-11-22 13:06:47,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:47,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-22 13:06:47,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036033990] [2020-11-22 13:06:47,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-22 13:06:47,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:47,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-22 13:06:47,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-22 13:06:47,362 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 9 states. [2020-11-22 13:06:47,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:47,653 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-11-22 13:06:47,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-22 13:06:47,653 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-11-22 13:06:47,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:47,654 INFO L225 Difference]: With dead ends: 24 [2020-11-22 13:06:47,654 INFO L226 Difference]: Without dead ends: 24 [2020-11-22 13:06:47,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-11-22 13:06:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-22 13:06:47,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-22 13:06:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-22 13:06:47,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-11-22 13:06:47,658 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 11 [2020-11-22 13:06:47,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:47,658 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-11-22 13:06:47,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-22 13:06:47,658 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-11-22 13:06:47,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 13:06:47,658 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:47,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:47,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 13:06:47,659 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:06:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash 727664527, now seen corresponding path program 1 times [2020-11-22 13:06:47,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:47,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399616267] [2020-11-22 13:06:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:47,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399616267] [2020-11-22 13:06:47,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:47,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-22 13:06:47,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364980373] [2020-11-22 13:06:47,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-22 13:06:47,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:47,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-22 13:06:47,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-11-22 13:06:47,853 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 11 states. [2020-11-22 13:06:48,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:48,276 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2020-11-22 13:06:48,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-22 13:06:48,276 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2020-11-22 13:06:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:48,277 INFO L225 Difference]: With dead ends: 24 [2020-11-22 13:06:48,277 INFO L226 Difference]: Without dead ends: 24 [2020-11-22 13:06:48,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-11-22 13:06:48,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-22 13:06:48,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-22 13:06:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-22 13:06:48,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 23 transitions. [2020-11-22 13:06:48,280 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 23 transitions. Word has length 12 [2020-11-22 13:06:48,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:48,280 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 23 transitions. [2020-11-22 13:06:48,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-22 13:06:48,280 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 23 transitions. [2020-11-22 13:06:48,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 13:06:48,281 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:48,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:48,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 13:06:48,281 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:06:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:48,282 INFO L82 PathProgramCache]: Analyzing trace with hash 727666064, now seen corresponding path program 1 times [2020-11-22 13:06:48,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:48,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338142941] [2020-11-22 13:06:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:48,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338142941] [2020-11-22 13:06:48,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:48,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-22 13:06:48,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049197498] [2020-11-22 13:06:48,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-22 13:06:48,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:48,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-22 13:06:48,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-22 13:06:48,406 INFO L87 Difference]: Start difference. First operand 24 states and 23 transitions. Second operand 9 states. [2020-11-22 13:06:48,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:48,688 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2020-11-22 13:06:48,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-22 13:06:48,688 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-22 13:06:48,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:48,689 INFO L225 Difference]: With dead ends: 23 [2020-11-22 13:06:48,689 INFO L226 Difference]: Without dead ends: 23 [2020-11-22 13:06:48,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-11-22 13:06:48,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-22 13:06:48,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-22 13:06:48,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-22 13:06:48,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-11-22 13:06:48,691 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 12 [2020-11-22 13:06:48,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:48,691 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-11-22 13:06:48,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-22 13:06:48,691 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-11-22 13:06:48,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 13:06:48,691 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:48,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:48,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-22 13:06:48,692 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:06:48,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:48,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1082811576, now seen corresponding path program 1 times [2020-11-22 13:06:48,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:48,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585718247] [2020-11-22 13:06:48,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:48,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585718247] [2020-11-22 13:06:48,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:48,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-22 13:06:48,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933593221] [2020-11-22 13:06:48,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-22 13:06:48,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:48,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-22 13:06:48,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-22 13:06:48,856 INFO L87 Difference]: Start difference. First operand 23 states and 22 transitions. Second operand 9 states. [2020-11-22 13:06:49,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:49,079 INFO L93 Difference]: Finished difference Result 22 states and 21 transitions. [2020-11-22 13:06:49,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-22 13:06:49,079 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-11-22 13:06:49,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:49,080 INFO L225 Difference]: With dead ends: 22 [2020-11-22 13:06:49,080 INFO L226 Difference]: Without dead ends: 22 [2020-11-22 13:06:49,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-11-22 13:06:49,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-22 13:06:49,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-22 13:06:49,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-22 13:06:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 21 transitions. [2020-11-22 13:06:49,082 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 21 transitions. Word has length 13 [2020-11-22 13:06:49,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:49,083 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 21 transitions. [2020-11-22 13:06:49,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-22 13:06:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 21 transitions. [2020-11-22 13:06:49,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 13:06:49,083 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:49,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:49,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-22 13:06:49,084 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:06:49,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:49,084 INFO L82 PathProgramCache]: Analyzing trace with hash -792579438, now seen corresponding path program 1 times [2020-11-22 13:06:49,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:49,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976848964] [2020-11-22 13:06:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:49,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976848964] [2020-11-22 13:06:49,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:49,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-22 13:06:49,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44643176] [2020-11-22 13:06:49,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:06:49,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:49,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:06:49,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:06:49,175 INFO L87 Difference]: Start difference. First operand 22 states and 21 transitions. Second operand 8 states. [2020-11-22 13:06:49,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:49,330 INFO L93 Difference]: Finished difference Result 21 states and 20 transitions. [2020-11-22 13:06:49,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-22 13:06:49,330 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-11-22 13:06:49,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:49,331 INFO L225 Difference]: With dead ends: 21 [2020-11-22 13:06:49,331 INFO L226 Difference]: Without dead ends: 21 [2020-11-22 13:06:49,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-11-22 13:06:49,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-22 13:06:49,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-22 13:06:49,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-22 13:06:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2020-11-22 13:06:49,333 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 14 [2020-11-22 13:06:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:49,333 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2020-11-22 13:06:49,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:06:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2020-11-22 13:06:49,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 13:06:49,334 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:49,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:49,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-22 13:06:49,334 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:06:49,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:49,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1199841274, now seen corresponding path program 1 times [2020-11-22 13:06:49,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:49,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499828931] [2020-11-22 13:06:49,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:49,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499828931] [2020-11-22 13:06:49,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:49,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-22 13:06:49,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203961783] [2020-11-22 13:06:49,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:06:49,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:49,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:06:49,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:06:49,437 INFO L87 Difference]: Start difference. First operand 21 states and 20 transitions. Second operand 8 states. [2020-11-22 13:06:49,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:49,609 INFO L93 Difference]: Finished difference Result 20 states and 19 transitions. [2020-11-22 13:06:49,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-22 13:06:49,609 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-11-22 13:06:49,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:49,610 INFO L225 Difference]: With dead ends: 20 [2020-11-22 13:06:49,610 INFO L226 Difference]: Without dead ends: 20 [2020-11-22 13:06:49,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-11-22 13:06:49,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-22 13:06:49,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-22 13:06:49,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-22 13:06:49,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2020-11-22 13:06:49,612 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 15 [2020-11-22 13:06:49,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:49,612 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2020-11-22 13:06:49,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:06:49,613 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2020-11-22 13:06:49,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-22 13:06:49,613 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:49,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:49,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-22 13:06:49,614 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:06:49,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:49,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1459626092, now seen corresponding path program 1 times [2020-11-22 13:06:49,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:49,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935888508] [2020-11-22 13:06:49,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:49,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935888508] [2020-11-22 13:06:49,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:49,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-22 13:06:49,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297972194] [2020-11-22 13:06:49,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-22 13:06:49,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:49,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-22 13:06:49,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-22 13:06:49,824 INFO L87 Difference]: Start difference. First operand 20 states and 19 transitions. Second operand 11 states. [2020-11-22 13:06:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:50,156 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2020-11-22 13:06:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-22 13:06:50,164 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-11-22 13:06:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:50,165 INFO L225 Difference]: With dead ends: 19 [2020-11-22 13:06:50,165 INFO L226 Difference]: Without dead ends: 19 [2020-11-22 13:06:50,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-11-22 13:06:50,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-22 13:06:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-22 13:06:50,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-22 13:06:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2020-11-22 13:06:50,167 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 16 [2020-11-22 13:06:50,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:50,167 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2020-11-22 13:06:50,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-22 13:06:50,167 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2020-11-22 13:06:50,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 13:06:50,168 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:50,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:50,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-22 13:06:50,168 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:06:50,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:50,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1753633943, now seen corresponding path program 1 times [2020-11-22 13:06:50,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:50,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178634888] [2020-11-22 13:06:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:51,460 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-11-22 13:06:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:52,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178634888] [2020-11-22 13:06:52,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:52,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-22 13:06:52,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417758937] [2020-11-22 13:06:52,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-22 13:06:52,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:52,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-22 13:06:52,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-11-22 13:06:52,348 INFO L87 Difference]: Start difference. First operand 19 states and 18 transitions. Second operand 18 states. [2020-11-22 13:06:52,730 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-11-22 13:06:53,062 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-11-22 13:06:53,337 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2020-11-22 13:06:53,716 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2020-11-22 13:06:54,289 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 105 [2020-11-22 13:06:54,808 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 112 [2020-11-22 13:06:55,293 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 110 [2020-11-22 13:06:55,873 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 112 [2020-11-22 13:06:56,330 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 104 [2020-11-22 13:06:56,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:56,410 INFO L93 Difference]: Finished difference Result 18 states and 17 transitions. [2020-11-22 13:06:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-22 13:06:56,413 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2020-11-22 13:06:56,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:56,413 INFO L225 Difference]: With dead ends: 18 [2020-11-22 13:06:56,413 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:06:56,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2020-11-22 13:06:56,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:06:56,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:06:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:06:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:06:56,415 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-11-22 13:06:56,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:56,415 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:06:56,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-22 13:06:56,415 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:06:56,415 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:06:56,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-22 13:06:56,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:06:56 BoogieIcfgContainer [2020-11-22 13:06:56,420 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:06:56,420 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:06:56,420 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:06:56,421 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:06:56,421 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:46" (3/4) ... [2020-11-22 13:06:56,424 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:06:56,433 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2020-11-22 13:06:56,433 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-22 13:06:56,434 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-22 13:06:56,434 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:06:56,467 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8e460117-17a1-4425-92fb-dcce33184965/bin/utaipan/witness.graphml [2020-11-22 13:06:56,468 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:06:56,469 INFO L168 Benchmark]: Toolchain (without parser) took 11713.31 ms. Allocated memory was 104.9 MB in the beginning and 218.1 MB in the end (delta: 113.2 MB). Free memory was 73.8 MB in the beginning and 185.9 MB in the end (delta: -112.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:56,470 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 104.9 MB. Free memory was 61.5 MB in the beginning and 61.4 MB in the end (delta: 73.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:06:56,470 INFO L168 Benchmark]: CACSL2BoogieTranslator took 489.61 ms. Allocated memory was 104.9 MB in the beginning and 148.9 MB in the end (delta: 44.0 MB). Free memory was 73.6 MB in the beginning and 112.4 MB in the end (delta: -38.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:56,471 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.25 ms. Allocated memory is still 148.9 MB. Free memory was 112.4 MB in the beginning and 110.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:56,471 INFO L168 Benchmark]: Boogie Preprocessor took 42.49 ms. Allocated memory is still 148.9 MB. Free memory was 110.4 MB in the beginning and 109.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:06:56,472 INFO L168 Benchmark]: RCFGBuilder took 663.04 ms. Allocated memory is still 148.9 MB. Free memory was 109.0 MB in the beginning and 82.2 MB in the end (delta: 26.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:56,472 INFO L168 Benchmark]: TraceAbstraction took 10389.52 ms. Allocated memory was 148.9 MB in the beginning and 218.1 MB in the end (delta: 69.2 MB). Free memory was 81.7 MB in the beginning and 189.0 MB in the end (delta: -107.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:06:56,473 INFO L168 Benchmark]: Witness Printer took 47.52 ms. Allocated memory is still 218.1 MB. Free memory was 189.0 MB in the beginning and 185.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:56,475 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 104.9 MB. Free memory was 61.5 MB in the beginning and 61.4 MB in the end (delta: 73.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 489.61 ms. Allocated memory was 104.9 MB in the beginning and 148.9 MB in the end (delta: 44.0 MB). Free memory was 73.6 MB in the beginning and 112.4 MB in the end (delta: -38.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.25 ms. Allocated memory is still 148.9 MB. Free memory was 112.4 MB in the beginning and 110.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.49 ms. Allocated memory is still 148.9 MB. Free memory was 110.4 MB in the beginning and 109.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 663.04 ms. Allocated memory is still 148.9 MB. Free memory was 109.0 MB in the beginning and 82.2 MB in the end (delta: 26.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10389.52 ms. Allocated memory was 148.9 MB in the beginning and 218.1 MB in the end (delta: 69.2 MB). Free memory was 81.7 MB in the beginning and 189.0 MB in the end (delta: -107.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 47.52 ms. Allocated memory is still 218.1 MB. Free memory was 189.0 MB in the beginning and 185.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 538]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 541]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 23 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 23 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.3s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 167 SDtfs, 609 SDslu, 130 SDs, 0 SdLazy, 801 SolverSat, 129 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, 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, 14 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 135 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 121 ConstructedInterpolants, 0 QuantifiedInterpolants, 29747 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...