./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/list-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 857285933727e0d6539ccc24abeb7a5fe95b45c6 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 06:32:22,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 06:32:22,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 06:32:22,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 06:32:22,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 06:32:22,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 06:32:22,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 06:32:22,509 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 06:32:22,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 06:32:22,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 06:32:22,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 06:32:22,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 06:32:22,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 06:32:22,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 06:32:22,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 06:32:22,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 06:32:22,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 06:32:22,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 06:32:22,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 06:32:22,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 06:32:22,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 06:32:22,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 06:32:22,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 06:32:22,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 06:32:22,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 06:32:22,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 06:32:22,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 06:32:22,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 06:32:22,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 06:32:22,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 06:32:22,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 06:32:22,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 06:32:22,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 06:32:22,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 06:32:22,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 06:32:22,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 06:32:22,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 06:32:22,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 06:32:22,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 06:32:22,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 06:32:22,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 06:32:22,538 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2020-12-09 06:32:22,555 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 06:32:22,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 06:32:22,556 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 06:32:22,556 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 06:32:22,556 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 06:32:22,556 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 06:32:22,556 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 06:32:22,556 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 06:32:22,557 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 06:32:22,557 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 06:32:22,557 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 06:32:22,557 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 06:32:22,557 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 06:32:22,557 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 06:32:22,557 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 06:32:22,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 06:32:22,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 06:32:22,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 06:32:22,558 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 06:32:22,558 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 06:32:22,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 06:32:22,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 06:32:22,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 06:32:22,559 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 06:32:22,559 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 06:32:22,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 06:32:22,559 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 06:32:22,559 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 06:32:22,559 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 06:32:22,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 06:32:22,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 06:32:22,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:32:22,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 06:32:22,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 06:32:22,560 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 06:32:22,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 06:32:22,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 06:32:22,560 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 06:32:22,560 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_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 857285933727e0d6539ccc24abeb7a5fe95b45c6 [2020-12-09 06:32:22,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 06:32:22,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 06:32:22,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 06:32:22,761 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 06:32:22,762 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 06:32:22,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/bin/utaipan/../../sv-benchmarks/c/list-properties/list-2.i [2020-12-09 06:32:22,802 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/bin/utaipan/data/ca0e93d4b/cdaaec20845c41e388439375c6985ffb/FLAGce43d806a [2020-12-09 06:32:23,187 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 06:32:23,188 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/sv-benchmarks/c/list-properties/list-2.i [2020-12-09 06:32:23,197 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/bin/utaipan/data/ca0e93d4b/cdaaec20845c41e388439375c6985ffb/FLAGce43d806a [2020-12-09 06:32:23,206 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/bin/utaipan/data/ca0e93d4b/cdaaec20845c41e388439375c6985ffb [2020-12-09 06:32:23,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 06:32:23,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 06:32:23,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 06:32:23,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 06:32:23,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 06:32:23,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:32:23" (1/1) ... [2020-12-09 06:32:23,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dab9c35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:32:23, skipping insertion in model container [2020-12-09 06:32:23,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:32:23" (1/1) ... [2020-12-09 06:32:23,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 06:32:23,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 06:32:23,415 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/sv-benchmarks/c/list-properties/list-2.i[23408,23421] [2020-12-09 06:32:23,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:32:23,423 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 06:32:23,451 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/sv-benchmarks/c/list-properties/list-2.i[23408,23421] [2020-12-09 06:32:23,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:32:23,485 INFO L208 MainTranslator]: Completed translation [2020-12-09 06:32:23,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:32:23 WrapperNode [2020-12-09 06:32:23,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 06:32:23,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 06:32:23,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 06:32:23,487 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 06:32:23,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:32:23" (1/1) ... [2020-12-09 06:32:23,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:32:23" (1/1) ... [2020-12-09 06:32:23,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 06:32:23,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 06:32:23,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 06:32:23,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 06:32:23,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:32:23" (1/1) ... [2020-12-09 06:32:23,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:32:23" (1/1) ... [2020-12-09 06:32:23,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:32:23" (1/1) ... [2020-12-09 06:32:23,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:32:23" (1/1) ... [2020-12-09 06:32:23,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:32:23" (1/1) ... [2020-12-09 06:32:23,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:32:23" (1/1) ... [2020-12-09 06:32:23,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:32:23" (1/1) ... [2020-12-09 06:32:23,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 06:32:23,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 06:32:23,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 06:32:23,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 06:32:23,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:32:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:32:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 06:32:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 06:32:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 06:32:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 06:32:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 06:32:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 06:32:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 06:32:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 06:32:23,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 06:32:23,942 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 06:32:23,942 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-09 06:32:23,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:32:23 BoogieIcfgContainer [2020-12-09 06:32:23,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 06:32:23,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 06:32:23,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 06:32:23,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 06:32:23,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:32:23" (1/3) ... [2020-12-09 06:32:23,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0619b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:32:23, skipping insertion in model container [2020-12-09 06:32:23,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:32:23" (2/3) ... [2020-12-09 06:32:23,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0619b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:32:23, skipping insertion in model container [2020-12-09 06:32:23,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:32:23" (3/3) ... [2020-12-09 06:32:23,950 INFO L111 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-12-09 06:32:23,960 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 06:32:23,963 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 26 error locations. [2020-12-09 06:32:23,970 INFO L253 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2020-12-09 06:32:23,998 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 06:32:23,998 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 06:32:23,998 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 06:32:23,998 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 06:32:23,998 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 06:32:23,998 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 06:32:23,999 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 06:32:23,999 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 06:32:24,011 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-12-09 06:32:24,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 06:32:24,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:32:24,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 06:32:24,016 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 06:32:24,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:32:24,020 INFO L82 PathProgramCache]: Analyzing trace with hash 157337163, now seen corresponding path program 1 times [2020-12-09 06:32:24,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:32:24,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071428385] [2020-12-09 06:32:24,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:32:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:32:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:32:24,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071428385] [2020-12-09 06:32:24,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:32:24,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:32:24,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113874020] [2020-12-09 06:32:24,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 06:32:24,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:32:24,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 06:32:24,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 06:32:24,136 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 2 states. [2020-12-09 06:32:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:32:24,146 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-12-09 06:32:24,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 06:32:24,147 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 06:32:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:32:24,152 INFO L225 Difference]: With dead ends: 56 [2020-12-09 06:32:24,153 INFO L226 Difference]: Without dead ends: 52 [2020-12-09 06:32:24,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 06:32:24,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-09 06:32:24,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-09 06:32:24,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 06:32:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-12-09 06:32:24,177 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 5 [2020-12-09 06:32:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:32:24,178 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-12-09 06:32:24,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 06:32:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-12-09 06:32:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 06:32:24,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:32:24,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 06:32:24,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 06:32:24,178 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 06:32:24,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:32:24,179 INFO L82 PathProgramCache]: Analyzing trace with hash 157311537, now seen corresponding path program 1 times [2020-12-09 06:32:24,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:32:24,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124324424] [2020-12-09 06:32:24,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:32:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:32:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:32:24,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124324424] [2020-12-09 06:32:24,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:32:24,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:32:24,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994125862] [2020-12-09 06:32:24,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:32:24,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:32:24,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:32:24,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:32:24,224 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 4 states. [2020-12-09 06:32:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:32:24,317 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-12-09 06:32:24,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 06:32:24,318 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 06:32:24,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:32:24,319 INFO L225 Difference]: With dead ends: 59 [2020-12-09 06:32:24,319 INFO L226 Difference]: Without dead ends: 59 [2020-12-09 06:32:24,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:32:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-09 06:32:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-12-09 06:32:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-09 06:32:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-12-09 06:32:24,327 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 5 [2020-12-09 06:32:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:32:24,327 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-12-09 06:32:24,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:32:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-12-09 06:32:24,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 06:32:24,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:32:24,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 06:32:24,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 06:32:24,328 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 06:32:24,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:32:24,329 INFO L82 PathProgramCache]: Analyzing trace with hash 157311538, now seen corresponding path program 1 times [2020-12-09 06:32:24,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:32:24,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385753979] [2020-12-09 06:32:24,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:32:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:32:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:32:24,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385753979] [2020-12-09 06:32:24,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:32:24,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:32:24,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125921375] [2020-12-09 06:32:24,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:32:24,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:32:24,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:32:24,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:32:24,392 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 4 states. [2020-12-09 06:32:24,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:32:24,480 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2020-12-09 06:32:24,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 06:32:24,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 06:32:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:32:24,482 INFO L225 Difference]: With dead ends: 72 [2020-12-09 06:32:24,482 INFO L226 Difference]: Without dead ends: 72 [2020-12-09 06:32:24,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:32:24,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-09 06:32:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2020-12-09 06:32:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-09 06:32:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-12-09 06:32:24,487 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 5 [2020-12-09 06:32:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:32:24,487 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-12-09 06:32:24,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:32:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-12-09 06:32:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 06:32:24,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:32:24,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:32:24,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 06:32:24,488 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 06:32:24,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:32:24,489 INFO L82 PathProgramCache]: Analyzing trace with hash 247613557, now seen corresponding path program 1 times [2020-12-09 06:32:24,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:32:24,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255893944] [2020-12-09 06:32:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:32:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:32:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:32:24,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255893944] [2020-12-09 06:32:24,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:32:24,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 06:32:24,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010539396] [2020-12-09 06:32:24,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 06:32:24,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:32:24,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 06:32:24,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:32:24,535 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 5 states. [2020-12-09 06:32:24,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:32:24,622 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-12-09 06:32:24,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 06:32:24,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 06:32:24,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:32:24,623 INFO L225 Difference]: With dead ends: 84 [2020-12-09 06:32:24,623 INFO L226 Difference]: Without dead ends: 84 [2020-12-09 06:32:24,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 06:32:24,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-09 06:32:24,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2020-12-09 06:32:24,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-09 06:32:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2020-12-09 06:32:24,629 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 11 [2020-12-09 06:32:24,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:32:24,629 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2020-12-09 06:32:24,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 06:32:24,629 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2020-12-09 06:32:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 06:32:24,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:32:24,630 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:32:24,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 06:32:24,630 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 06:32:24,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:32:24,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1128259475, now seen corresponding path program 1 times [2020-12-09 06:32:24,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:32:24,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736435339] [2020-12-09 06:32:24,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:32:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:32:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:32:24,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736435339] [2020-12-09 06:32:24,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:32:24,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 06:32:24,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503799286] [2020-12-09 06:32:24,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 06:32:24,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:32:24,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 06:32:24,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:32:24,689 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 5 states. [2020-12-09 06:32:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:32:24,775 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-12-09 06:32:24,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 06:32:24,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 06:32:24,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:32:24,777 INFO L225 Difference]: With dead ends: 84 [2020-12-09 06:32:24,777 INFO L226 Difference]: Without dead ends: 84 [2020-12-09 06:32:24,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 06:32:24,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-09 06:32:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2020-12-09 06:32:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-09 06:32:24,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-12-09 06:32:24,781 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 11 [2020-12-09 06:32:24,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:32:24,781 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-12-09 06:32:24,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 06:32:24,781 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-12-09 06:32:24,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 06:32:24,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:32:24,781 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:32:24,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 06:32:24,782 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 06:32:24,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:32:24,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1128259474, now seen corresponding path program 1 times [2020-12-09 06:32:24,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:32:24,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135291361] [2020-12-09 06:32:24,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:32:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:32:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:32:24,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135291361] [2020-12-09 06:32:24,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:32:24,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 06:32:24,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657850255] [2020-12-09 06:32:24,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 06:32:24,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:32:24,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 06:32:24,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:32:24,837 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 5 states. [2020-12-09 06:32:24,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:32:24,943 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2020-12-09 06:32:24,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 06:32:24,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 06:32:24,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:32:24,945 INFO L225 Difference]: With dead ends: 76 [2020-12-09 06:32:24,945 INFO L226 Difference]: Without dead ends: 76 [2020-12-09 06:32:24,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 06:32:24,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-09 06:32:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 50. [2020-12-09 06:32:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-09 06:32:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-12-09 06:32:24,948 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 11 [2020-12-09 06:32:24,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:32:24,948 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-12-09 06:32:24,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 06:32:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-12-09 06:32:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 06:32:24,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:32:24,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:32:24,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 06:32:24,949 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 06:32:24,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:32:24,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1730475431, now seen corresponding path program 1 times [2020-12-09 06:32:24,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:32:24,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147822924] [2020-12-09 06:32:24,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:32:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:32:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:32:24,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147822924] [2020-12-09 06:32:24,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:32:24,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 06:32:24,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992316321] [2020-12-09 06:32:24,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 06:32:24,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:32:24,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 06:32:24,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:32:24,985 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 5 states. [2020-12-09 06:32:25,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:32:25,044 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-12-09 06:32:25,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 06:32:25,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-09 06:32:25,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:32:25,045 INFO L225 Difference]: With dead ends: 73 [2020-12-09 06:32:25,045 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 06:32:25,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 06:32:25,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 06:32:25,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2020-12-09 06:32:25,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 06:32:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-12-09 06:32:25,050 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 13 [2020-12-09 06:32:25,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:32:25,050 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-12-09 06:32:25,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 06:32:25,050 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-12-09 06:32:25,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 06:32:25,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:32:25,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:32:25,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 06:32:25,051 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 06:32:25,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:32:25,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2105045028, now seen corresponding path program 1 times [2020-12-09 06:32:25,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:32:25,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226755924] [2020-12-09 06:32:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:32:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:32:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:32:25,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226755924] [2020-12-09 06:32:25,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:32:25,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 06:32:25,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798953827] [2020-12-09 06:32:25,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 06:32:25,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:32:25,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 06:32:25,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:32:25,091 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 5 states. [2020-12-09 06:32:25,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:32:25,149 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-12-09 06:32:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 06:32:25,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-09 06:32:25,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:32:25,150 INFO L225 Difference]: With dead ends: 71 [2020-12-09 06:32:25,150 INFO L226 Difference]: Without dead ends: 71 [2020-12-09 06:32:25,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 06:32:25,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-09 06:32:25,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 54. [2020-12-09 06:32:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-09 06:32:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-12-09 06:32:25,153 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 14 [2020-12-09 06:32:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:32:25,153 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-12-09 06:32:25,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 06:32:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-12-09 06:32:25,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 06:32:25,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:32:25,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:32:25,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 06:32:25,155 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 06:32:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:32:25,155 INFO L82 PathProgramCache]: Analyzing trace with hash 831891515, now seen corresponding path program 1 times [2020-12-09 06:32:25,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:32:25,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412590374] [2020-12-09 06:32:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:32:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 06:32:25,167 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 06:32:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 06:32:25,179 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 06:32:25,198 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 06:32:25,198 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 06:32:25,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 06:32:25,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:32:25 BoogieIcfgContainer [2020-12-09 06:32:25,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 06:32:25,221 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 06:32:25,221 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 06:32:25,221 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 06:32:25,221 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:32:23" (3/4) ... [2020-12-09 06:32:25,222 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 06:32:25,255 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_af9f267d-11f6-4a3a-b3a6-e1354c94d9b9/bin/utaipan/witness.graphml [2020-12-09 06:32:25,255 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 06:32:25,257 INFO L168 Benchmark]: Toolchain (without parser) took 2045.98 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 55.1 MB in the beginning and 40.1 MB in the end (delta: 15.0 MB). Peak memory consumption was 38.3 MB. Max. memory is 16.1 GB. [2020-12-09 06:32:25,257 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 98.6 MB. Free memory is still 72.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:32:25,258 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.37 ms. Allocated memory is still 98.6 MB. Free memory was 55.0 MB in the beginning and 58.7 MB in the end (delta: -3.8 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2020-12-09 06:32:25,258 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.94 ms. Allocated memory is still 98.6 MB. Free memory was 58.7 MB in the beginning and 56.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:32:25,258 INFO L168 Benchmark]: Boogie Preprocessor took 21.27 ms. Allocated memory is still 98.6 MB. Free memory was 56.6 MB in the beginning and 55.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:32:25,259 INFO L168 Benchmark]: RCFGBuilder took 405.06 ms. Allocated memory is still 98.6 MB. Free memory was 55.2 MB in the beginning and 44.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 06:32:25,259 INFO L168 Benchmark]: TraceAbstraction took 1275.52 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 44.1 MB in the beginning and 42.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 25.8 MB. Max. memory is 16.1 GB. [2020-12-09 06:32:25,260 INFO L168 Benchmark]: Witness Printer took 34.34 ms. Allocated memory is still 119.5 MB. Free memory was 42.2 MB in the beginning and 40.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:32:25,263 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 98.6 MB. Free memory is still 72.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 275.37 ms. Allocated memory is still 98.6 MB. Free memory was 55.0 MB in the beginning and 58.7 MB in the end (delta: -3.8 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.94 ms. Allocated memory is still 98.6 MB. Free memory was 58.7 MB in the beginning and 56.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.27 ms. Allocated memory is still 98.6 MB. Free memory was 56.6 MB in the beginning and 55.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 405.06 ms. Allocated memory is still 98.6 MB. Free memory was 55.2 MB in the beginning and 44.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1275.52 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 44.1 MB in the beginning and 42.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 25.8 MB. Max. memory is 16.1 GB. * Witness Printer took 34.34 ms. Allocated memory is still 119.5 MB. Free memory was 42.2 MB in the beginning and 40.1 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: - CounterExampleResult [Line: 531]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] EXPR p->h [L552] COND FALSE !(p->h == 2) [L554] EXPR p->h [L554] COND FALSE !(p->h == 1) [L556] EXPR p->h [L556] COND FALSE !(p->h != 3) [L558] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 56 locations, 26 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 268 SDtfs, 385 SDslu, 325 SDs, 0 SdLazy, 525 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=4, 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, 8 MinimizatonAttempts, 110 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 67 ConstructedInterpolants, 0 QuantifiedInterpolants, 3539 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...