./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a43e9100-d293-4e76-a406-db59468571a2/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a43e9100-d293-4e76-a406-db59468571a2/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a43e9100-d293-4e76-a406-db59468571a2/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a43e9100-d293-4e76-a406-db59468571a2/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a43e9100-d293-4e76-a406-db59468571a2/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a43e9100-d293-4e76-a406-db59468571a2/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2af97cd1d0200c0dff6df008e1ae10eecdfc76e4 ..................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 17:26:04,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:26:04,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:26:04,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:26:04,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:26:04,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:26:04,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:26:04,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:26:04,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:26:04,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:26:04,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:26:04,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:26:04,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:26:04,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:26:04,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:26:04,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:26:04,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:26:04,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:26:04,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:26:04,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:26:04,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:26:04,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:26:04,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:26:04,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:26:04,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:26:04,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:26:04,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:26:04,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:26:04,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:26:04,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:26:04,536 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:26:04,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:26:04,538 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:26:04,538 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:26:04,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:26:04,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:26:04,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:26:04,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:26:04,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:26:04,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:26:04,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:26:04,543 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a43e9100-d293-4e76-a406-db59468571a2/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 17:26:04,566 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:26:04,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:26:04,567 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:26:04,568 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:26:04,568 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:26:04,568 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:26:04,568 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 17:26:04,568 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:26:04,568 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:26:04,569 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 17:26:04,569 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 17:26:04,569 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:26:04,569 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 17:26:04,569 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 17:26:04,570 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 17:26:04,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:26:04,570 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:26:04,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:26:04,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:26:04,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:26:04,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 17:26:04,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:26:04,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 17:26:04,571 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:26:04,572 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:26:04,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 17:26:04,572 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:26:04,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 17:26:04,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:26:04,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:26:04,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:26:04,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:26:04,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:26:04,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 17:26:04,573 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 17:26:04,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 17:26:04,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 17:26:04,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:26:04,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:26:04,574 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_a43e9100-d293-4e76-a406-db59468571a2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a43e9100-d293-4e76-a406-db59468571a2/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2af97cd1d0200c0dff6df008e1ae10eecdfc76e4 [2020-12-09 17:26:04,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:26:04,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:26:04,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:26:04,769 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:26:04,770 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:26:04,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a43e9100-d293-4e76-a406-db59468571a2/bin/utaipan/../../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2020-12-09 17:26:04,810 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a43e9100-d293-4e76-a406-db59468571a2/bin/utaipan/data/f234475f2/c7a224e7c0af4240af69639e1227b1b0/FLAG8d3d833ed [2020-12-09 17:26:05,254 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:26:05,255 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a43e9100-d293-4e76-a406-db59468571a2/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2020-12-09 17:26:05,264 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a43e9100-d293-4e76-a406-db59468571a2/bin/utaipan/data/f234475f2/c7a224e7c0af4240af69639e1227b1b0/FLAG8d3d833ed [2020-12-09 17:26:05,274 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a43e9100-d293-4e76-a406-db59468571a2/bin/utaipan/data/f234475f2/c7a224e7c0af4240af69639e1227b1b0 [2020-12-09 17:26:05,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:26:05,277 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:26:05,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:26:05,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:26:05,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:26:05,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:26:05" (1/1) ... [2020-12-09 17:26:05,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@555bf059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:05, skipping insertion in model container [2020-12-09 17:26:05,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:26:05" (1/1) ... [2020-12-09 17:26:05,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:26:05,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:26:05,426 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_a43e9100-d293-4e76-a406-db59468571a2/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i[296,309] [2020-12-09 17:26:05,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:26:05,540 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:26:05,551 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_a43e9100-d293-4e76-a406-db59468571a2/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i[296,309] [2020-12-09 17:26:05,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:26:05,620 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:26:05,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:05 WrapperNode [2020-12-09 17:26:05,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:26:05,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:26:05,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:26:05,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:26:05,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:05" (1/1) ... [2020-12-09 17:26:05,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:05" (1/1) ... [2020-12-09 17:26:05,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:26:05,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:26:05,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:26:05,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:26:05,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:05" (1/1) ... [2020-12-09 17:26:05,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:05" (1/1) ... [2020-12-09 17:26:05,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:05" (1/1) ... [2020-12-09 17:26:05,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:05" (1/1) ... [2020-12-09 17:26:05,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:05" (1/1) ... [2020-12-09 17:26:05,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:05" (1/1) ... [2020-12-09 17:26:05,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:05" (1/1) ... [2020-12-09 17:26:05,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:26:05,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:26:05,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:26:05,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:26:05,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a43e9100-d293-4e76-a406-db59468571a2/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 17:26:05,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:26:05,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-09 17:26:05,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 17:26:05,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:26:05,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:26:06,149 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:26:06,149 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-09 17:26:06,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:26:06 BoogieIcfgContainer [2020-12-09 17:26:06,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:26:06,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:26:06,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:26:06,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:26:06,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:26:05" (1/3) ... [2020-12-09 17:26:06,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ee0f4c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:26:06, skipping insertion in model container [2020-12-09 17:26:06,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:05" (2/3) ... [2020-12-09 17:26:06,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ee0f4c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:26:06, skipping insertion in model container [2020-12-09 17:26:06,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:26:06" (3/3) ... [2020-12-09 17:26:06,159 INFO L111 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-12-09 17:26:06,172 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:26:06,174 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-09 17:26:06,182 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-09 17:26:06,198 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:26:06,198 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 17:26:06,198 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:26:06,198 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:26:06,198 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:26:06,198 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:26:06,199 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:26:06,199 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:26:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-12-09 17:26:06,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 17:26:06,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:06,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 17:26:06,212 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:06,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:06,216 INFO L82 PathProgramCache]: Analyzing trace with hash 155908, now seen corresponding path program 1 times [2020-12-09 17:26:06,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:06,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246703256] [2020-12-09 17:26:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:06,334 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 17:26:06,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246703256] [2020-12-09 17:26:06,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:26:06,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:26:06,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522177122] [2020-12-09 17:26:06,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:26:06,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:06,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:26:06,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:26:06,352 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-12-09 17:26:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:06,376 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-12-09 17:26:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:26:06,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 17:26:06,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:06,385 INFO L225 Difference]: With dead ends: 50 [2020-12-09 17:26:06,385 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 17:26:06,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:26:06,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 17:26:06,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 17:26:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 17:26:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2020-12-09 17:26:06,415 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 3 [2020-12-09 17:26:06,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:06,416 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2020-12-09 17:26:06,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:26:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2020-12-09 17:26:06,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 17:26:06,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:06,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:06,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 17:26:06,417 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:06,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:06,418 INFO L82 PathProgramCache]: Analyzing trace with hash -991578850, now seen corresponding path program 1 times [2020-12-09 17:26:06,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:06,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7516143] [2020-12-09 17:26:06,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:06,476 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 17:26:06,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7516143] [2020-12-09 17:26:06,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:26:06,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:26:06,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025022981] [2020-12-09 17:26:06,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:26:06,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:06,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:26:06,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:26:06,479 INFO L87 Difference]: Start difference. First operand 21 states and 20 transitions. Second operand 4 states. [2020-12-09 17:26:06,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:06,506 INFO L93 Difference]: Finished difference Result 21 states and 20 transitions. [2020-12-09 17:26:06,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:26:06,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 17:26:06,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:06,507 INFO L225 Difference]: With dead ends: 21 [2020-12-09 17:26:06,507 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 17:26:06,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:26:06,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 17:26:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 17:26:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 17:26:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2020-12-09 17:26:06,510 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 8 [2020-12-09 17:26:06,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:06,511 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2020-12-09 17:26:06,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:26:06,511 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2020-12-09 17:26:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 17:26:06,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:06,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:06,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 17:26:06,512 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:06,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:06,512 INFO L82 PathProgramCache]: Analyzing trace with hash 575490104, now seen corresponding path program 1 times [2020-12-09 17:26:06,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:06,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122856317] [2020-12-09 17:26:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:06,645 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 17:26:06,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122856317] [2020-12-09 17:26:06,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:26:06,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 17:26:06,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784883622] [2020-12-09 17:26:06,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 17:26:06,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:06,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 17:26:06,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:26:06,647 INFO L87 Difference]: Start difference. First operand 19 states and 18 transitions. Second operand 7 states. [2020-12-09 17:26:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:06,757 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2020-12-09 17:26:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 17:26:06,757 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-09 17:26:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:06,758 INFO L225 Difference]: With dead ends: 19 [2020-12-09 17:26:06,758 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 17:26:06,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-09 17:26:06,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 17:26:06,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-09 17:26:06,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 17:26:06,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 16 transitions. [2020-12-09 17:26:06,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 16 transitions. Word has length 10 [2020-12-09 17:26:06,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:06,762 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 16 transitions. [2020-12-09 17:26:06,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 17:26:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 16 transitions. [2020-12-09 17:26:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 17:26:06,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:06,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:06,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 17:26:06,764 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:06,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:06,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1004774808, now seen corresponding path program 1 times [2020-12-09 17:26:06,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:06,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833918729] [2020-12-09 17:26:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:06,838 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 17:26:06,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833918729] [2020-12-09 17:26:06,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:26:06,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 17:26:06,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217777935] [2020-12-09 17:26:06,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 17:26:06,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:06,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 17:26:06,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:26:06,840 INFO L87 Difference]: Start difference. First operand 17 states and 16 transitions. Second operand 7 states. [2020-12-09 17:26:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:06,907 INFO L93 Difference]: Finished difference Result 17 states and 16 transitions. [2020-12-09 17:26:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 17:26:06,907 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-09 17:26:06,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:06,908 INFO L225 Difference]: With dead ends: 17 [2020-12-09 17:26:06,908 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 17:26:06,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-09 17:26:06,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 17:26:06,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 17:26:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 17:26:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-12-09 17:26:06,910 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 12 [2020-12-09 17:26:06,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:06,910 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-12-09 17:26:06,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 17:26:06,910 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-12-09 17:26:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 17:26:06,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:06,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:06,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 17:26:06,911 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:06,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:06,912 INFO L82 PathProgramCache]: Analyzing trace with hash 779052744, now seen corresponding path program 1 times [2020-12-09 17:26:06,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:06,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539637005] [2020-12-09 17:26:06,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:26:06,931 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:26:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:26:06,948 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:26:06,966 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 17:26:06,966 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 17:26:06,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 17:26:06,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:26:06 BoogieIcfgContainer [2020-12-09 17:26:06,994 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:26:06,994 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:26:06,994 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:26:06,994 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:26:06,995 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:26:06" (3/4) ... [2020-12-09 17:26:06,996 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 17:26:07,033 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a43e9100-d293-4e76-a406-db59468571a2/bin/utaipan/witness.graphml [2020-12-09 17:26:07,033 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:26:07,035 INFO L168 Benchmark]: Toolchain (without parser) took 1757.11 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 70.7 MB in the beginning and 88.6 MB in the end (delta: -17.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 16.1 GB. [2020-12-09 17:26:07,035 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 109.1 MB. Free memory was 88.0 MB in the beginning and 87.9 MB in the end (delta: 78.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:26:07,036 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.25 ms. Allocated memory is still 109.1 MB. Free memory was 70.5 MB in the beginning and 72.5 MB in the end (delta: -2.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 17:26:07,036 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.01 ms. Allocated memory is still 109.1 MB. Free memory was 72.5 MB in the beginning and 70.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:26:07,037 INFO L168 Benchmark]: Boogie Preprocessor took 25.80 ms. Allocated memory is still 109.1 MB. Free memory was 70.4 MB in the beginning and 69.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:26:07,037 INFO L168 Benchmark]: RCFGBuilder took 464.75 ms. Allocated memory is still 109.1 MB. Free memory was 68.8 MB in the beginning and 71.8 MB in the end (delta: -3.0 MB). Peak memory consumption was 31.8 MB. Max. memory is 16.1 GB. [2020-12-09 17:26:07,038 INFO L168 Benchmark]: TraceAbstraction took 840.75 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 71.2 MB in the beginning and 91.7 MB in the end (delta: -20.6 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-12-09 17:26:07,039 INFO L168 Benchmark]: Witness Printer took 39.18 ms. Allocated memory is still 132.1 MB. Free memory was 91.7 MB in the beginning and 88.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:26:07,041 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 109.1 MB. Free memory was 88.0 MB in the beginning and 87.9 MB in the end (delta: 78.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 343.25 ms. Allocated memory is still 109.1 MB. Free memory was 70.5 MB in the beginning and 72.5 MB in the end (delta: -2.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.01 ms. Allocated memory is still 109.1 MB. Free memory was 72.5 MB in the beginning and 70.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.80 ms. Allocated memory is still 109.1 MB. Free memory was 70.4 MB in the beginning and 69.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 464.75 ms. Allocated memory is still 109.1 MB. Free memory was 68.8 MB in the beginning and 71.8 MB in the end (delta: -3.0 MB). Peak memory consumption was 31.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 840.75 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 71.2 MB in the beginning and 91.7 MB in the end (delta: -20.6 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Witness Printer took 39.18 ms. Allocated memory is still 132.1 MB. Free memory was 91.7 MB in the beginning and 88.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L519] void * guard_malloc_counter = 0; [L534] struct list_head *elem = ((void *)0); [L544] static struct list_head head; [L546] struct list_head *dev1, *dev2; [L522] (size > 0) ? (0) : __blast_assert () VAL [elem={0:0}, guard_malloc_counter={0:0}, head={7:0}] [L523] guard_malloc_counter++ [L524] COND FALSE !(!__VERIFIER_nondet_int()) [L526] return (void *) guard_malloc_counter; [L529] return __getMemory(size); [L547] dev1 = my_malloc(sizeof(*dev1)) [L522] (size > 0) ? (0) : __blast_assert () VAL [elem={0:0}, guard_malloc_counter={0:1}, head={7:0}] [L523] guard_malloc_counter++ [L524] COND FALSE !(!__VERIFIER_nondet_int()) [L526] return (void *) guard_malloc_counter; [L529] return __getMemory(size); [L548] dev2 = my_malloc(sizeof(*dev2)) [L549] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) [L536] (new!=elem) ? (0) : __blast_assert () VAL [elem={0:0}, guard_malloc_counter={0:2}, head={7:0}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] elem = new [L536] (new!=elem) ? (0) : __blast_assert () VAL [elem={0:2}, guard_malloc_counter={0:2}, head={7:0}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] elem = new [L541] COND FALSE !(entry==elem) [L536] (new!=elem) ? (0) : __blast_assert () VAL [elem={0:1}, guard_malloc_counter={0:2}, head={7:0}] [L537] COND FALSE !(__VERIFIER_nondet_int()) [L536] (new!=elem) ? (0) : __blast_assert () VAL [elem={0:1}, guard_malloc_counter={0:2}, head={7:0}] [L6] reach_error() VAL [elem={0:1}, guard_malloc_counter={0:2}, head={7:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 51 SDtfs, 41 SDslu, 39 SDs, 0 SdLazy, 115 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 2182 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...