./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.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_1c2a802e-be18-498b-8007-94548ca4caa9/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1c2a802e-be18-498b-8007-94548ca4caa9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1c2a802e-be18-498b-8007-94548ca4caa9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1c2a802e-be18-498b-8007-94548ca4caa9/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_1c2a802e-be18-498b-8007-94548ca4caa9/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1c2a802e-be18-498b-8007-94548ca4caa9/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 822411a57a10ce043cb0121fce52bdc7e9506783 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:13:21,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:13:21,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:13:21,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:13:21,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:13:21,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:13:21,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:13:21,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:13:21,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:13:21,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:13:21,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:13:21,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:13:21,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:13:21,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:13:21,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:13:21,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:13:21,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:13:21,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:13:21,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:13:21,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:13:21,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:13:21,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:13:21,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:13:21,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:13:21,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:13:21,506 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:13:21,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:13:21,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:13:21,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:13:21,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:13:21,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:13:21,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:13:21,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:13:21,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:13:21,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:13:21,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:13:21,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:13:21,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:13:21,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:13:21,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:13:21,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:13:21,533 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1c2a802e-be18-498b-8007-94548ca4caa9/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-30 02:13:21,587 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:13:21,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:13:21,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:13:21,589 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:13:21,590 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:13:21,590 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:13:21,590 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:13:21,591 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:13:21,591 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:13:21,591 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:13:21,593 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:13:21,593 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:13:21,593 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:13:21,594 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:13:21,594 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:13:21,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 02:13:21,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 02:13:21,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:13:21,596 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:13:21,596 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 02:13:21,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:13:21,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:13:21,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:13:21,597 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 02:13:21,598 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 02:13:21,598 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 02:13:21,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:13:21,598 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:13:21,599 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:13:21,599 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:13:21,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:13:21,600 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:13:21,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:13:21,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:13:21,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:13:21,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:13:21,601 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:13:21,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:13:21,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:13:21,602 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:13:21,602 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_1c2a802e-be18-498b-8007-94548ca4caa9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1c2a802e-be18-498b-8007-94548ca4caa9/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 822411a57a10ce043cb0121fce52bdc7e9506783 [2020-11-30 02:13:21,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:13:22,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:13:22,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:13:22,033 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:13:22,034 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:13:22,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1c2a802e-be18-498b-8007-94548ca4caa9/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i [2020-11-30 02:13:22,126 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1c2a802e-be18-498b-8007-94548ca4caa9/bin/utaipan/data/1cdeec2fc/6c2445e0de844566b224855a6c1af700/FLAG804cc5dc8 [2020-11-30 02:13:22,751 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:13:22,752 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1c2a802e-be18-498b-8007-94548ca4caa9/sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i [2020-11-30 02:13:22,770 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1c2a802e-be18-498b-8007-94548ca4caa9/bin/utaipan/data/1cdeec2fc/6c2445e0de844566b224855a6c1af700/FLAG804cc5dc8 [2020-11-30 02:13:23,017 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1c2a802e-be18-498b-8007-94548ca4caa9/bin/utaipan/data/1cdeec2fc/6c2445e0de844566b224855a6c1af700 [2020-11-30 02:13:23,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:13:23,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:13:23,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:13:23,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:13:23,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:13:23,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:13:23" (1/1) ... [2020-11-30 02:13:23,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56b2587c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:13:23, skipping insertion in model container [2020-11-30 02:13:23,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:13:23" (1/1) ... [2020-11-30 02:13:23,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:13:23,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:13:23,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:13:23,482 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:13:23,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:13:23,596 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:13:23,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:13:23 WrapperNode [2020-11-30 02:13:23,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:13:23,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:13:23,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:13:23,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:13:23,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:13:23" (1/1) ... [2020-11-30 02:13:23,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:13:23" (1/1) ... [2020-11-30 02:13:23,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:13:23,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:13:23,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:13:23,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:13:23,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:13:23" (1/1) ... [2020-11-30 02:13:23,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:13:23" (1/1) ... [2020-11-30 02:13:23,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:13:23" (1/1) ... [2020-11-30 02:13:23,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:13:23" (1/1) ... [2020-11-30 02:13:23,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:13:23" (1/1) ... [2020-11-30 02:13:23,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:13:23" (1/1) ... [2020-11-30 02:13:23,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:13:23" (1/1) ... [2020-11-30 02:13:23,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:13:23,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:13:23,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:13:23,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:13:23,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:13:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c2a802e-be18-498b-8007-94548ca4caa9/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 [2020-11-30 02:13:23,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 02:13:23,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:13:23,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 02:13:23,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:13:23,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:13:24,445 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:13:24,445 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-30 02:13:24,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:13:24 BoogieIcfgContainer [2020-11-30 02:13:24,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:13:24,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:13:24,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:13:24,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:13:24,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:13:23" (1/3) ... [2020-11-30 02:13:24,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82a23ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:13:24, skipping insertion in model container [2020-11-30 02:13:24,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:13:23" (2/3) ... [2020-11-30 02:13:24,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82a23ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:13:24, skipping insertion in model container [2020-11-30 02:13:24,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:13:24" (3/3) ... [2020-11-30 02:13:24,461 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cbzero-alloca-2.i [2020-11-30 02:13:24,479 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:13:24,484 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-30 02:13:24,499 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-30 02:13:24,537 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:13:24,537 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 02:13:24,538 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:13:24,538 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:13:24,538 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:13:24,538 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:13:24,538 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:13:24,538 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:13:24,558 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-11-30 02:13:24,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 02:13:24,565 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:13:24,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 02:13:24,566 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-30 02:13:24,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:13:24,575 INFO L82 PathProgramCache]: Analyzing trace with hash 76485, now seen corresponding path program 1 times [2020-11-30 02:13:24,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:13:24,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749278401] [2020-11-30 02:13:24,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:13:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:13:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:13:24,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749278401] [2020-11-30 02:13:24,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:13:24,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 02:13:24,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390827106] [2020-11-30 02:13:24,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:13:24,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:13:24,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:13:24,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:13:24,881 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-11-30 02:13:24,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:13:24,943 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-11-30 02:13:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:13:24,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 02:13:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:13:24,957 INFO L225 Difference]: With dead ends: 12 [2020-11-30 02:13:24,958 INFO L226 Difference]: Without dead ends: 10 [2020-11-30 02:13:24,960 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 [2020-11-30 02:13:24,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-30 02:13:24,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-30 02:13:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-30 02:13:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-11-30 02:13:25,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 3 [2020-11-30 02:13:25,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:13:25,004 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-11-30 02:13:25,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:13:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-11-30 02:13:25,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:13:25,005 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:13:25,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:13:25,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:13:25,006 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-30 02:13:25,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:13:25,006 INFO L82 PathProgramCache]: Analyzing trace with hash 73547189, now seen corresponding path program 1 times [2020-11-30 02:13:25,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:13:25,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070663906] [2020-11-30 02:13:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:13:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:13:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:13:25,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070663906] [2020-11-30 02:13:25,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:13:25,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:13:25,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96218849] [2020-11-30 02:13:25,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:13:25,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:13:25,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:13:25,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:13:25,111 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 4 states. [2020-11-30 02:13:25,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:13:25,180 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2020-11-30 02:13:25,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:13:25,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-30 02:13:25,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:13:25,182 INFO L225 Difference]: With dead ends: 9 [2020-11-30 02:13:25,182 INFO L226 Difference]: Without dead ends: 9 [2020-11-30 02:13:25,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:13:25,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-11-30 02:13:25,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-30 02:13:25,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-30 02:13:25,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-11-30 02:13:25,185 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2020-11-30 02:13:25,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:13:25,186 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-11-30 02:13:25,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:13:25,186 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-11-30 02:13:25,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:13:25,188 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:13:25,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:13:25,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 02:13:25,189 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-30 02:13:25,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:13:25,190 INFO L82 PathProgramCache]: Analyzing trace with hash 73547190, now seen corresponding path program 1 times [2020-11-30 02:13:25,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:13:25,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334559311] [2020-11-30 02:13:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:13:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:13:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:13:25,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334559311] [2020-11-30 02:13:25,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:13:25,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:13:25,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070235228] [2020-11-30 02:13:25,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:13:25,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:13:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:13:25,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:13:25,343 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2020-11-30 02:13:25,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:13:25,399 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-11-30 02:13:25,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:13:25,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-30 02:13:25,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:13:25,400 INFO L225 Difference]: With dead ends: 15 [2020-11-30 02:13:25,400 INFO L226 Difference]: Without dead ends: 15 [2020-11-30 02:13:25,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:13:25,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-30 02:13:25,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2020-11-30 02:13:25,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 02:13:25,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-30 02:13:25,405 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 5 [2020-11-30 02:13:25,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:13:25,405 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-30 02:13:25,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:13:25,405 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-11-30 02:13:25,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 02:13:25,406 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:13:25,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 02:13:25,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 02:13:25,406 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-30 02:13:25,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:13:25,407 INFO L82 PathProgramCache]: Analyzing trace with hash -2015006103, now seen corresponding path program 1 times [2020-11-30 02:13:25,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:13:25,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94444001] [2020-11-30 02:13:25,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:13:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:13:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:13:25,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94444001] [2020-11-30 02:13:25,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:13:25,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 02:13:25,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554070521] [2020-11-30 02:13:25,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:13:25,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:13:25,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:13:25,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:13:25,551 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2020-11-30 02:13:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:13:25,640 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-11-30 02:13:25,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:13:25,642 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-30 02:13:25,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:13:25,643 INFO L225 Difference]: With dead ends: 12 [2020-11-30 02:13:25,643 INFO L226 Difference]: Without dead ends: 12 [2020-11-30 02:13:25,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:13:25,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-30 02:13:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-30 02:13:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 02:13:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-30 02:13:25,647 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 6 [2020-11-30 02:13:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:13:25,647 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-30 02:13:25,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:13:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-30 02:13:25,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 02:13:25,648 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:13:25,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-11-30 02:13:25,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 02:13:25,649 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-30 02:13:25,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:13:25,650 INFO L82 PathProgramCache]: Analyzing trace with hash 611367033, now seen corresponding path program 1 times [2020-11-30 02:13:25,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:13:25,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145119770] [2020-11-30 02:13:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:13:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:13:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:13:25,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145119770] [2020-11-30 02:13:25,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892203862] [2020-11-30 02:13:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c2a802e-be18-498b-8007-94548ca4caa9/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:13:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:13:26,029 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-30 02:13:26,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:13:26,143 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-30 02:13:26,143 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:13:26,160 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:13:26,161 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:13:26,161 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2020-11-30 02:13:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:13:26,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:13:26,598 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-30 02:13:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:13:26,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [873814796] [2020-11-30 02:13:27,011 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-30 02:13:27,012 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:13:27,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:13:27,023 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:13:27,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:13:27,990 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:13:28,298 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-11-30 02:13:28,761 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2020-11-30 02:13:29,209 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-11-30 02:13:29,212 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:13:29,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:13:29,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2020-11-30 02:13:29,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079981472] [2020-11-30 02:13:29,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-30 02:13:29,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:13:29,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-30 02:13:29,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2020-11-30 02:13:29,215 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 21 states. [2020-11-30 02:13:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:13:29,588 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-11-30 02:13:29,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 02:13:29,589 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 8 [2020-11-30 02:13:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:13:29,589 INFO L225 Difference]: With dead ends: 15 [2020-11-30 02:13:29,590 INFO L226 Difference]: Without dead ends: 15 [2020-11-30 02:13:29,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2020-11-30 02:13:29,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-30 02:13:29,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-30 02:13:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 02:13:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-30 02:13:29,593 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2020-11-30 02:13:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:13:29,593 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-30 02:13:29,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-30 02:13:29,593 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-30 02:13:29,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:13:29,594 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:13:29,594 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:13:29,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:13:29,803 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-30 02:13:29,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:13:29,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1772507142, now seen corresponding path program 1 times [2020-11-30 02:13:29,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:13:29,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379998975] [2020-11-30 02:13:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:13:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:13:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:13:29,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379998975] [2020-11-30 02:13:29,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:13:29,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:13:29,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126585712] [2020-11-30 02:13:29,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:13:29,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:13:29,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:13:29,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:13:29,870 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-11-30 02:13:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:13:29,886 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2020-11-30 02:13:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:13:29,887 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-30 02:13:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:13:29,888 INFO L225 Difference]: With dead ends: 14 [2020-11-30 02:13:29,888 INFO L226 Difference]: Without dead ends: 12 [2020-11-30 02:13:29,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:13:29,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-30 02:13:29,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-30 02:13:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 02:13:29,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-30 02:13:29,890 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2020-11-30 02:13:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:13:29,891 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-30 02:13:29,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:13:29,891 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-30 02:13:29,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 02:13:29,891 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:13:29,892 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1] [2020-11-30 02:13:29,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-30 02:13:29,892 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-30 02:13:29,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:13:29,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1720671530, now seen corresponding path program 2 times [2020-11-30 02:13:29,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:13:29,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635444882] [2020-11-30 02:13:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:13:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:13:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:13:30,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635444882] [2020-11-30 02:13:30,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054837521] [2020-11-30 02:13:30,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c2a802e-be18-498b-8007-94548ca4caa9/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:13:30,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 02:13:30,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:13:30,311 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2020-11-30 02:13:30,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:13:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:13:30,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:13:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:13:32,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033493376] [2020-11-30 02:13:32,022 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-30 02:13:32,022 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:13:32,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:13:32,023 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:13:32,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:13:32,481 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:13:32,806 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-11-30 02:13:33,301 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-11-30 02:13:33,302 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:13:33,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:13:33,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2020-11-30 02:13:33,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189150645] [2020-11-30 02:13:33,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-30 02:13:33,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:13:33,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-30 02:13:33,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2020-11-30 02:13:33,313 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 27 states. [2020-11-30 02:13:34,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:13:34,376 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-11-30 02:13:34,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-30 02:13:34,377 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 11 [2020-11-30 02:13:34,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:13:34,378 INFO L225 Difference]: With dead ends: 14 [2020-11-30 02:13:34,378 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 02:13:34,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2020-11-30 02:13:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 02:13:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 02:13:34,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 02:13:34,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 02:13:34,380 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-11-30 02:13:34,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:13:34,380 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 02:13:34,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-30 02:13:34,380 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 02:13:34,381 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 02:13:34,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:13:34,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:13:34 BoogieIcfgContainer [2020-11-30 02:13:34,595 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:13:34,596 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:13:34,596 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:13:34,596 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:13:34,597 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:13:24" (3/4) ... [2020-11-30 02:13:34,602 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 02:13:34,614 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-11-30 02:13:34,614 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-30 02:13:34,615 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 02:13:34,683 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1c2a802e-be18-498b-8007-94548ca4caa9/bin/utaipan/witness.graphml [2020-11-30 02:13:34,684 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:13:34,685 INFO L168 Benchmark]: Toolchain (without parser) took 11662.85 ms. Allocated memory was 94.4 MB in the beginning and 163.6 MB in the end (delta: 69.2 MB). Free memory was 59.8 MB in the beginning and 127.9 MB in the end (delta: -68.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 16.1 GB. [2020-11-30 02:13:34,685 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory was 66.1 MB in the beginning and 66.1 MB in the end (delta: 26.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:13:34,686 INFO L168 Benchmark]: CACSL2BoogieTranslator took 574.56 ms. Allocated memory is still 94.4 MB. Free memory was 59.6 MB in the beginning and 61.1 MB in the end (delta: -1.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 02:13:34,686 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.09 ms. Allocated memory is still 94.4 MB. Free memory was 61.1 MB in the beginning and 59.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:13:34,687 INFO L168 Benchmark]: Boogie Preprocessor took 27.47 ms. Allocated memory is still 94.4 MB. Free memory was 59.4 MB in the beginning and 58.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:13:34,687 INFO L168 Benchmark]: RCFGBuilder took 774.66 ms. Allocated memory is still 94.4 MB. Free memory was 58.2 MB in the beginning and 40.9 MB in the end (delta: 17.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-30 02:13:34,688 INFO L168 Benchmark]: TraceAbstraction took 10145.35 ms. Allocated memory was 94.4 MB in the beginning and 163.6 MB in the end (delta: 69.2 MB). Free memory was 40.5 MB in the beginning and 130.0 MB in the end (delta: -89.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:13:34,688 INFO L168 Benchmark]: Witness Printer took 88.12 ms. Allocated memory is still 163.6 MB. Free memory was 130.0 MB in the beginning and 127.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:13:34,695 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory was 66.1 MB in the beginning and 66.1 MB in the end (delta: 26.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 574.56 ms. Allocated memory is still 94.4 MB. Free memory was 59.6 MB in the beginning and 61.1 MB in the end (delta: -1.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.09 ms. Allocated memory is still 94.4 MB. Free memory was 61.1 MB in the beginning and 59.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.47 ms. Allocated memory is still 94.4 MB. Free memory was 59.4 MB in the beginning and 58.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 774.66 ms. Allocated memory is still 94.4 MB. Free memory was 58.2 MB in the beginning and 40.9 MB in the end (delta: 17.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10145.35 ms. Allocated memory was 94.4 MB in the beginning and 163.6 MB in the end (delta: 69.2 MB). Free memory was 40.5 MB in the beginning and 130.0 MB in the end (delta: -89.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 88.12 ms. Allocated memory is still 163.6 MB. Free memory was 130.0 MB in the beginning and 127.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.0s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 45 SDslu, 80 SDs, 0 SdLazy, 258 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=5, 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, 7 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 74 ConstructedInterpolants, 1 QuantifiedInterpolants, 9649 SizeOfPredicates, 32 NumberOfNonLiveVariables, 170 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 2/38 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...