./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0019-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0019-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0c6505355e23ab050a0b1754726876dca60bcf4 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0019-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0c6505355e23ab050a0b1754726876dca60bcf4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 11:56:47,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 11:56:47,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 11:56:47,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 11:56:47,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 11:56:47,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 11:56:47,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 11:56:47,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 11:56:47,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 11:56:47,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 11:56:47,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 11:56:47,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 11:56:47,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 11:56:47,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 11:56:47,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 11:56:47,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 11:56:47,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 11:56:47,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 11:56:47,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 11:56:47,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 11:56:47,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 11:56:47,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 11:56:47,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 11:56:47,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 11:56:47,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 11:56:47,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 11:56:47,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 11:56:47,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 11:56:47,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 11:56:47,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 11:56:47,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 11:56:47,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 11:56:47,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 11:56:47,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 11:56:47,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 11:56:47,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 11:56:47,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 11:56:47,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 11:56:47,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 11:56:47,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 11:56:47,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 11:56:47,574 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 11:56:47,597 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 11:56:47,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 11:56:47,598 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 11:56:47,599 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 11:56:47,599 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 11:56:47,599 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 11:56:47,599 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 11:56:47,599 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 11:56:47,599 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 11:56:47,600 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 11:56:47,600 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 11:56:47,600 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 11:56:47,600 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 11:56:47,600 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 11:56:47,601 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 11:56:47,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 11:56:47,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 11:56:47,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 11:56:47,602 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 11:56:47,602 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 11:56:47,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 11:56:47,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 11:56:47,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 11:56:47,603 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 11:56:47,603 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 11:56:47,603 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 11:56:47,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 11:56:47,603 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 11:56:47,604 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 11:56:47,604 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 11:56:47,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 11:56:47,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 11:56:47,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:56:47,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 11:56:47,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 11:56:47,605 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 11:56:47,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 11:56:47,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 11:56:47,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 11:56:47,605 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_1c11eb01-e1a1-4052-aa12-6826937bc6d2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0c6505355e23ab050a0b1754726876dca60bcf4 [2020-12-09 11:56:47,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 11:56:47,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 11:56:47,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 11:56:47,830 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 11:56:47,830 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 11:56:47,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/../../sv-benchmarks/c/memsafety/test-0019-2.i [2020-12-09 11:56:47,873 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/data/a137325d8/b5380714679e440cbfa4cbbf8c4dd29f/FLAGefe37aed2 [2020-12-09 11:56:48,256 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 11:56:48,257 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/sv-benchmarks/c/memsafety/test-0019-2.i [2020-12-09 11:56:48,267 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/data/a137325d8/b5380714679e440cbfa4cbbf8c4dd29f/FLAGefe37aed2 [2020-12-09 11:56:48,277 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/data/a137325d8/b5380714679e440cbfa4cbbf8c4dd29f [2020-12-09 11:56:48,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 11:56:48,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 11:56:48,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 11:56:48,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 11:56:48,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 11:56:48,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:56:48" (1/1) ... [2020-12-09 11:56:48,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22e2a031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:48, skipping insertion in model container [2020-12-09 11:56:48,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:56:48" (1/1) ... [2020-12-09 11:56:48,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 11:56:48,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 11:56:48,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:56:48,520 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 11:56:48,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:56:48,591 INFO L208 MainTranslator]: Completed translation [2020-12-09 11:56:48,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:48 WrapperNode [2020-12-09 11:56:48,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 11:56:48,592 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 11:56:48,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 11:56:48,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 11:56:48,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:48" (1/1) ... [2020-12-09 11:56:48,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:48" (1/1) ... [2020-12-09 11:56:48,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 11:56:48,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 11:56:48,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 11:56:48,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 11:56:48,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:48" (1/1) ... [2020-12-09 11:56:48,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:48" (1/1) ... [2020-12-09 11:56:48,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:48" (1/1) ... [2020-12-09 11:56:48,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:48" (1/1) ... [2020-12-09 11:56:48,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:48" (1/1) ... [2020-12-09 11:56:48,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:48" (1/1) ... [2020-12-09 11:56:48,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:48" (1/1) ... [2020-12-09 11:56:48,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 11:56:48,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 11:56:48,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 11:56:48,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 11:56:48,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/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 11:56:48,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 11:56:48,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 11:56:48,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 11:56:48,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 11:56:48,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 11:56:48,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 11:56:48,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 11:56:48,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 11:56:49,026 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 11:56:49,026 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 11:56:49,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:56:49 BoogieIcfgContainer [2020-12-09 11:56:49,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 11:56:49,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 11:56:49,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 11:56:49,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 11:56:49,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 11:56:48" (1/3) ... [2020-12-09 11:56:49,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4723d488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:56:49, skipping insertion in model container [2020-12-09 11:56:49,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:48" (2/3) ... [2020-12-09 11:56:49,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4723d488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:56:49, skipping insertion in model container [2020-12-09 11:56:49,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:56:49" (3/3) ... [2020-12-09 11:56:49,034 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0019-2.i [2020-12-09 11:56:49,043 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 11:56:49,046 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-12-09 11:56:49,053 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-12-09 11:56:49,069 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 11:56:49,070 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 11:56:49,070 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 11:56:49,070 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 11:56:49,070 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 11:56:49,070 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 11:56:49,070 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 11:56:49,070 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 11:56:49,081 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-12-09 11:56:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2020-12-09 11:56:49,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:56:49,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1] [2020-12-09 11:56:49,086 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:56:49,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:56:49,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2515, now seen corresponding path program 1 times [2020-12-09 11:56:49,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:56:49,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749752567] [2020-12-09 11:56:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:56:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:56:49,231 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 11:56:49,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749752567] [2020-12-09 11:56:49,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:56:49,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 11:56:49,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561388026] [2020-12-09 11:56:49,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 11:56:49,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:56:49,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 11:56:49,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:56:49,246 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-12-09 11:56:49,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:56:49,286 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-12-09 11:56:49,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 11:56:49,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2020-12-09 11:56:49,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:56:49,293 INFO L225 Difference]: With dead ends: 39 [2020-12-09 11:56:49,293 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 11:56:49,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:56:49,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 11:56:49,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-12-09 11:56:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-09 11:56:49,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-12-09 11:56:49,316 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 2 [2020-12-09 11:56:49,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:56:49,316 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-12-09 11:56:49,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 11:56:49,316 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-12-09 11:56:49,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2020-12-09 11:56:49,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:56:49,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1] [2020-12-09 11:56:49,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 11:56:49,317 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:56:49,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:56:49,318 INFO L82 PathProgramCache]: Analyzing trace with hash 2516, now seen corresponding path program 1 times [2020-12-09 11:56:49,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:56:49,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737029646] [2020-12-09 11:56:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:56:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:56:49,353 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 11:56:49,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737029646] [2020-12-09 11:56:49,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:56:49,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 11:56:49,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093711340] [2020-12-09 11:56:49,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 11:56:49,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:56:49,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 11:56:49,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:56:49,355 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 3 states. [2020-12-09 11:56:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:56:49,372 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-09 11:56:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 11:56:49,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2020-12-09 11:56:49,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:56:49,373 INFO L225 Difference]: With dead ends: 30 [2020-12-09 11:56:49,373 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 11:56:49,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:56:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 11:56:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-09 11:56:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 11:56:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-12-09 11:56:49,377 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 2 [2020-12-09 11:56:49,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:56:49,377 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-12-09 11:56:49,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 11:56:49,377 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-12-09 11:56:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 11:56:49,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:56:49,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 11:56:49,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 11:56:49,378 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:56:49,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:56:49,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2467551, now seen corresponding path program 1 times [2020-12-09 11:56:49,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:56:49,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132544660] [2020-12-09 11:56:49,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:56:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:56:49,414 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 11:56:49,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132544660] [2020-12-09 11:56:49,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:56:49,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:56:49,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272159847] [2020-12-09 11:56:49,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:56:49,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:56:49,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:56:49,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:56:49,416 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 4 states. [2020-12-09 11:56:49,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:56:49,454 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-12-09 11:56:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:56:49,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 11:56:49,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:56:49,455 INFO L225 Difference]: With dead ends: 29 [2020-12-09 11:56:49,455 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 11:56:49,455 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 11:56:49,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 11:56:49,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-09 11:56:49,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 11:56:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-09 11:56:49,460 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 4 [2020-12-09 11:56:49,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:56:49,460 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-09 11:56:49,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:56:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-09 11:56:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 11:56:49,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:56:49,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 11:56:49,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 11:56:49,461 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:56:49,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:56:49,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2467552, now seen corresponding path program 1 times [2020-12-09 11:56:49,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:56:49,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482943292] [2020-12-09 11:56:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:56:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:56:49,520 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 11:56:49,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482943292] [2020-12-09 11:56:49,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:56:49,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:56:49,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037947820] [2020-12-09 11:56:49,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:56:49,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:56:49,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:56:49,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:56:49,521 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 4 states. [2020-12-09 11:56:49,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:56:49,553 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-09 11:56:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 11:56:49,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 11:56:49,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:56:49,554 INFO L225 Difference]: With dead ends: 24 [2020-12-09 11:56:49,554 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 11:56:49,555 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 11:56:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 11:56:49,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-09 11:56:49,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 11:56:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-09 11:56:49,558 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 4 [2020-12-09 11:56:49,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:56:49,558 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-09 11:56:49,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:56:49,558 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-09 11:56:49,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 11:56:49,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:56:49,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:56:49,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 11:56:49,559 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:56:49,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:56:49,559 INFO L82 PathProgramCache]: Analyzing trace with hash 497700460, now seen corresponding path program 1 times [2020-12-09 11:56:49,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:56:49,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176730956] [2020-12-09 11:56:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:56:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:56:49,618 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 11:56:49,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176730956] [2020-12-09 11:56:49,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:56:49,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:56:49,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191994144] [2020-12-09 11:56:49,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 11:56:49,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:56:49,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 11:56:49,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:56:49,620 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 6 states. [2020-12-09 11:56:49,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:56:49,686 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-09 11:56:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 11:56:49,686 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-09 11:56:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:56:49,687 INFO L225 Difference]: With dead ends: 23 [2020-12-09 11:56:49,687 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 11:56:49,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-09 11:56:49,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 11:56:49,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-09 11:56:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 11:56:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-09 11:56:49,689 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 7 [2020-12-09 11:56:49,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:56:49,690 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-09 11:56:49,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 11:56:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-09 11:56:49,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 11:56:49,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:56:49,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:56:49,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 11:56:49,690 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:56:49,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:56:49,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1751154868, now seen corresponding path program 1 times [2020-12-09 11:56:49,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:56:49,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126524336] [2020-12-09 11:56:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:56:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:56:49,750 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 11:56:49,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126524336] [2020-12-09 11:56:49,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:56:49,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:56:49,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796929001] [2020-12-09 11:56:49,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 11:56:49,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:56:49,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 11:56:49,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:56:49,752 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 6 states. [2020-12-09 11:56:49,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:56:49,834 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-09 11:56:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 11:56:49,835 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-09 11:56:49,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:56:49,835 INFO L225 Difference]: With dead ends: 22 [2020-12-09 11:56:49,835 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 11:56:49,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-09 11:56:49,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 11:56:49,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-09 11:56:49,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 11:56:49,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-09 11:56:49,838 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 8 [2020-12-09 11:56:49,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:56:49,839 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-09 11:56:49,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 11:56:49,839 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-09 11:56:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 11:56:49,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:56:49,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:56:49,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 11:56:49,840 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:56:49,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:56:49,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1549205321, now seen corresponding path program 1 times [2020-12-09 11:56:49,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:56:49,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452609324] [2020-12-09 11:56:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:56:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:56:49,866 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:56:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:56:49,889 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:56:49,907 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 11:56:49,907 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 11:56:49,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 11:56:49,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 11:56:49 BoogieIcfgContainer [2020-12-09 11:56:49,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 11:56:49,924 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 11:56:49,924 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 11:56:49,924 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 11:56:49,925 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:56:49" (3/4) ... [2020-12-09 11:56:49,927 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 11:56:49,927 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 11:56:49,928 INFO L168 Benchmark]: Toolchain (without parser) took 1646.62 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 56.3 MB in the beginning and 92.1 MB in the end (delta: -35.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:56:49,928 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 98.6 MB. Free memory was 73.8 MB in the beginning and 73.6 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:56:49,929 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.18 ms. Allocated memory is still 98.6 MB. Free memory was 56.2 MB in the beginning and 60.4 MB in the end (delta: -4.3 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2020-12-09 11:56:49,929 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.07 ms. Allocated memory is still 98.6 MB. Free memory was 60.4 MB in the beginning and 58.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:56:49,930 INFO L168 Benchmark]: Boogie Preprocessor took 24.19 ms. Allocated memory is still 98.6 MB. Free memory was 58.7 MB in the beginning and 57.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:56:49,930 INFO L168 Benchmark]: RCFGBuilder took 371.29 ms. Allocated memory is still 98.6 MB. Free memory was 57.3 MB in the beginning and 53.6 MB in the end (delta: 3.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 11:56:49,930 INFO L168 Benchmark]: TraceAbstraction took 895.01 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 53.2 MB in the beginning and 93.1 MB in the end (delta: -39.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:56:49,931 INFO L168 Benchmark]: Witness Printer took 2.67 ms. Allocated memory is still 125.8 MB. Free memory was 93.1 MB in the beginning and 92.1 MB in the end (delta: 966.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:56:49,933 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 98.6 MB. Free memory was 73.8 MB in the beginning and 73.6 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 309.18 ms. Allocated memory is still 98.6 MB. Free memory was 56.2 MB in the beginning and 60.4 MB in the end (delta: -4.3 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.07 ms. Allocated memory is still 98.6 MB. Free memory was 60.4 MB in the beginning and 58.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.19 ms. Allocated memory is still 98.6 MB. Free memory was 58.7 MB in the beginning and 57.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 371.29 ms. Allocated memory is still 98.6 MB. Free memory was 57.3 MB in the beginning and 53.6 MB in the end (delta: 3.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 895.01 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 53.2 MB in the beginning and 93.1 MB in the end (delta: -39.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 2.67 ms. Allocated memory is still 125.8 MB. Free memory was 93.1 MB in the beginning and 92.1 MB in the end (delta: 966.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 543. Possible FailurePath: [L544] TData data; [L529] pdata->lo = malloc(16) [L530] pdata->hi = malloc(24) [L534] EXPR data->lo [L534] void *lo = data->lo; [L535] EXPR data->hi [L535] void *hi = data->hi; [L536] COND FALSE !(lo == hi) [L540] data->lo = (void *) 0 [L541] data->hi = (void *) 0 [L547] return 0; [L547] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 19 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 89 SDtfs, 247 SDslu, 19 SDs, 0 SdLazy, 106 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred 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, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 844 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 11:56:51,451 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-12-09 11:56:51,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 11:56:51,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 11:56:51,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 11:56:51,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 11:56:51,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 11:56:51,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 11:56:51,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 11:56:51,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 11:56:51,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 11:56:51,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 11:56:51,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 11:56:51,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 11:56:51,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 11:56:51,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 11:56:51,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 11:56:51,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 11:56:51,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 11:56:51,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 11:56:51,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 11:56:51,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 11:56:51,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 11:56:51,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 11:56:51,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 11:56:51,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 11:56:51,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 11:56:51,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 11:56:51,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 11:56:51,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 11:56:51,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 11:56:51,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-12-09 11:56:51,540 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 11:56:51,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 11:56:51,541 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 11:56:51,541 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 11:56:51,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 11:56:51,542 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 11:56:51,542 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 11:56:51,542 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 11:56:51,542 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 11:56:51,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 11:56:51,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 11:56:51,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 11:56:51,543 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 11:56:51,543 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 11:56:51,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 11:56:51,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 11:56:51,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 11:56:51,544 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 11:56:51,544 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 11:56:51,544 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 11:56:51,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 11:56:51,544 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 11:56:51,545 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 11:56:51,545 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 11:56:51,545 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 11:56:51,545 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 11:56:51,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 11:56:51,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 11:56:51,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 11:56:51,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:56:51,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 11:56:51,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 11:56:51,546 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 11:56:51,546 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 11:56:51,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 11:56:51,546 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 11:56:51,547 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_1c11eb01-e1a1-4052-aa12-6826937bc6d2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0c6505355e23ab050a0b1754726876dca60bcf4 [2020-12-09 11:56:51,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 11:56:51,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 11:56:51,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 11:56:51,784 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 11:56:51,784 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 11:56:51,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/../../sv-benchmarks/c/memsafety/test-0019-2.i [2020-12-09 11:56:51,827 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/data/e45305cae/cddbddb9c9b44b44847978e634c5d5b3/FLAG64101d462 [2020-12-09 11:56:52,240 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 11:56:52,241 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/sv-benchmarks/c/memsafety/test-0019-2.i [2020-12-09 11:56:52,250 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/data/e45305cae/cddbddb9c9b44b44847978e634c5d5b3/FLAG64101d462 [2020-12-09 11:56:52,260 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/data/e45305cae/cddbddb9c9b44b44847978e634c5d5b3 [2020-12-09 11:56:52,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 11:56:52,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 11:56:52,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 11:56:52,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 11:56:52,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 11:56:52,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:56:52" (1/1) ... [2020-12-09 11:56:52,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fcab5ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:52, skipping insertion in model container [2020-12-09 11:56:52,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:56:52" (1/1) ... [2020-12-09 11:56:52,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 11:56:52,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 11:56:52,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:56:52,546 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 11:56:52,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:56:52,645 INFO L208 MainTranslator]: Completed translation [2020-12-09 11:56:52,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:52 WrapperNode [2020-12-09 11:56:52,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 11:56:52,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 11:56:52,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 11:56:52,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 11:56:52,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:52" (1/1) ... [2020-12-09 11:56:52,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:52" (1/1) ... [2020-12-09 11:56:52,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 11:56:52,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 11:56:52,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 11:56:52,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 11:56:52,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:52" (1/1) ... [2020-12-09 11:56:52,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:52" (1/1) ... [2020-12-09 11:56:52,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:52" (1/1) ... [2020-12-09 11:56:52,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:52" (1/1) ... [2020-12-09 11:56:52,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:52" (1/1) ... [2020-12-09 11:56:52,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:52" (1/1) ... [2020-12-09 11:56:52,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:52" (1/1) ... [2020-12-09 11:56:52,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 11:56:52,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 11:56:52,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 11:56:52,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 11:56:52,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/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 11:56:52,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 11:56:52,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 11:56:52,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 11:56:52,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 11:56:52,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 11:56:52,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 11:56:52,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 11:56:52,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 11:56:53,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 11:56:53,114 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 11:56:53,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:56:53 BoogieIcfgContainer [2020-12-09 11:56:53,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 11:56:53,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 11:56:53,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 11:56:53,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 11:56:53,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 11:56:52" (1/3) ... [2020-12-09 11:56:53,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1b5a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:56:53, skipping insertion in model container [2020-12-09 11:56:53,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:56:52" (2/3) ... [2020-12-09 11:56:53,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1b5a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:56:53, skipping insertion in model container [2020-12-09 11:56:53,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:56:53" (3/3) ... [2020-12-09 11:56:53,120 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0019-2.i [2020-12-09 11:56:53,130 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 11:56:53,132 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-12-09 11:56:53,140 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-12-09 11:56:53,153 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 11:56:53,153 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 11:56:53,155 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 11:56:53,155 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 11:56:53,155 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 11:56:53,155 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 11:56:53,156 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 11:56:53,156 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 11:56:53,165 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-12-09 11:56:53,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 11:56:53,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:56:53,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 11:56:53,170 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:56:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:56:53,174 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2020-12-09 11:56:53,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:56:53,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757857338] [2020-12-09 11:56:53,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 11:56:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:56:53,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 11:56:53,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:56:53,305 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-09 11:56:53,305 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 11:56:53,307 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:56:53,311 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:56:53,315 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 11:56:53,315 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-12-09 11:56:53,329 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 11:56:53,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:56:53,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757857338] [2020-12-09 11:56:53,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:56:53,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:56:53,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032599259] [2020-12-09 11:56:53,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 11:56:53,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:56:53,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 11:56:53,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:56:53,347 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-12-09 11:56:53,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:56:53,456 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-12-09 11:56:53,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 11:56:53,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 11:56:53,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:56:53,463 INFO L225 Difference]: With dead ends: 47 [2020-12-09 11:56:53,463 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 11:56:53,464 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 11:56:53,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 11:56:53,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2020-12-09 11:56:53,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-09 11:56:53,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-09 11:56:53,491 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 3 [2020-12-09 11:56:53,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:56:53,491 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-09 11:56:53,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 11:56:53,491 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-09 11:56:53,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 11:56:53,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:56:53,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 11:56:53,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 11:56:53,693 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:56:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:56:53,694 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2020-12-09 11:56:53,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:56:53,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025770015] [2020-12-09 11:56:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 11:56:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:56:53,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 11:56:53,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:56:53,750 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_21|], 1=[|v_#valid_33|]} [2020-12-09 11:56:53,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 11:56:53,755 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 11:56:53,757 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:56:53,766 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:56:53,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 11:56:53,772 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-09 11:56:53,773 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 11:56:53,779 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:56:53,781 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 11:56:53,781 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:18 [2020-12-09 11:56:53,793 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 11:56:53,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:56:53,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025770015] [2020-12-09 11:56:53,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:56:53,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:56:53,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552462102] [2020-12-09 11:56:53,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 11:56:53,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:56:53,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 11:56:53,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:56:53,796 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 3 states. [2020-12-09 11:56:53,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:56:53,866 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-12-09 11:56:53,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 11:56:53,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 11:56:53,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:56:53,867 INFO L225 Difference]: With dead ends: 37 [2020-12-09 11:56:53,868 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 11:56:53,868 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 11:56:53,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 11:56:53,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-09 11:56:53,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-09 11:56:53,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-09 11:56:53,873 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 3 [2020-12-09 11:56:53,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:56:53,873 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-09 11:56:53,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 11:56:53,873 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-09 11:56:53,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 11:56:53,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:56:53,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 11:56:54,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 11:56:54,077 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:56:54,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:56:54,080 INFO L82 PathProgramCache]: Analyzing trace with hash 28691811, now seen corresponding path program 1 times [2020-12-09 11:56:54,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:56:54,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550072209] [2020-12-09 11:56:54,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 11:56:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:56:54,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 11:56:54,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:56:54,185 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_22|], 1=[|v_#valid_34|]} [2020-12-09 11:56:54,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 11:56:54,190 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 11:56:54,192 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:56:54,201 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:56:54,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 11:56:54,205 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-09 11:56:54,207 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 11:56:54,214 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:56:54,216 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 11:56:54,216 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:18 [2020-12-09 11:56:54,271 INFO L443 ElimStorePlain]: Different costs {1=[|v_#valid_35|], 3=[|v_#length_23|]} [2020-12-09 11:56:54,288 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:56:54,288 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2020-12-09 11:56:54,291 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:56:54,310 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:56:54,340 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:56:54,341 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 46 [2020-12-09 11:56:54,346 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 11:56:54,384 INFO L625 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2020-12-09 11:56:54,387 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 11:56:54,387 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:14 [2020-12-09 11:56:54,407 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 11:56:54,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:56:54,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550072209] [2020-12-09 11:56:54,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:56:54,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:56:54,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336714715] [2020-12-09 11:56:54,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 11:56:54,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:56:54,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 11:56:54,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:56:54,409 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 5 states. [2020-12-09 11:56:54,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:56:54,534 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-09 11:56:54,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:56:54,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-12-09 11:56:54,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:56:54,535 INFO L225 Difference]: With dead ends: 36 [2020-12-09 11:56:54,535 INFO L226 Difference]: Without dead ends: 36 [2020-12-09 11:56:54,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:56:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-09 11:56:54,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-09 11:56:54,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-09 11:56:54,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-12-09 11:56:54,539 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 5 [2020-12-09 11:56:54,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:56:54,539 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-12-09 11:56:54,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 11:56:54,539 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-12-09 11:56:54,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 11:56:54,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:56:54,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:56:54,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 11:56:54,741 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:56:54,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:56:54,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1803025027, now seen corresponding path program 1 times [2020-12-09 11:56:54,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:56:54,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590593664] [2020-12-09 11:56:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 11:56:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:56:54,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 11:56:54,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:56:54,880 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 11:56:54,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:56:54,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590593664] [2020-12-09 11:56:54,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:56:54,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:56:54,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083786155] [2020-12-09 11:56:54,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 11:56:54,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:56:54,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 11:56:54,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:56:54,882 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 5 states. [2020-12-09 11:56:55,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:56:55,014 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-09 11:56:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 11:56:55,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-09 11:56:55,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:56:55,016 INFO L225 Difference]: With dead ends: 38 [2020-12-09 11:56:55,016 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 11:56:55,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 11:56:55,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 11:56:55,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-12-09 11:56:55,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 11:56:55,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-09 11:56:55,019 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 7 [2020-12-09 11:56:55,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:56:55,019 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-09 11:56:55,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 11:56:55,020 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-09 11:56:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 11:56:55,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:56:55,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:56:55,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 11:56:55,222 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:56:55,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:56:55,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1803025028, now seen corresponding path program 1 times [2020-12-09 11:56:55,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:56:55,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941524849] [2020-12-09 11:56:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 11:56:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:56:55,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 11:56:55,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:56:55,338 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 11:56:55,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:56:55,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941524849] [2020-12-09 11:56:55,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:56:55,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:56:55,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964206508] [2020-12-09 11:56:55,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 11:56:55,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:56:55,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 11:56:55,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:56:55,340 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 5 states. [2020-12-09 11:56:55,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:56:55,432 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-09 11:56:55,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 11:56:55,432 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-09 11:56:55,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:56:55,433 INFO L225 Difference]: With dead ends: 30 [2020-12-09 11:56:55,433 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 11:56:55,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 11:56:55,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 11:56:55,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-09 11:56:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 11:56:55,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-12-09 11:56:55,436 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 7 [2020-12-09 11:56:55,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:56:55,436 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-12-09 11:56:55,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 11:56:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-12-09 11:56:55,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 11:56:55,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:56:55,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:56:55,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 11:56:55,638 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:56:55,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:56:55,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1591396527, now seen corresponding path program 1 times [2020-12-09 11:56:55,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:56:55,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571323755] [2020-12-09 11:56:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 11:56:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:56:55,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 11:56:55,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:56:55,745 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-09 11:56:55,745 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:56:55,747 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:56:55,748 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:56:55,748 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-12-09 11:56:55,778 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-09 11:56:55,779 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:56:55,781 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:56:55,781 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:56:55,781 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-12-09 11:56:55,811 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 11:56:55,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:56:55,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571323755] [2020-12-09 11:56:55,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:56:55,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 11:56:55,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449702948] [2020-12-09 11:56:55,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 11:56:55,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:56:55,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 11:56:55,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-09 11:56:55,813 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 9 states. [2020-12-09 11:56:56,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:56:56,134 INFO L93 Difference]: Finished difference Result 32 states and 31 transitions. [2020-12-09 11:56:56,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 11:56:56,134 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-09 11:56:56,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:56:56,135 INFO L225 Difference]: With dead ends: 32 [2020-12-09 11:56:56,135 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 11:56:56,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-12-09 11:56:56,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 11:56:56,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-12-09 11:56:56,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 11:56:56,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-12-09 11:56:56,137 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 12 [2020-12-09 11:56:56,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:56:56,138 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-12-09 11:56:56,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 11:56:56,138 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-12-09 11:56:56,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 11:56:56,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:56:56,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:56:56,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 11:56:56,340 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:56:56,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:56:56,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2088652025, now seen corresponding path program 1 times [2020-12-09 11:56:56,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:56:56,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022312901] [2020-12-09 11:56:56,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 11:56:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:56:56,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 11:56:56,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:56:56,483 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-09 11:56:56,483 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:56:56,497 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:56:56,499 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 11:56:56,499 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-12-09 11:56:56,567 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-09 11:56:56,568 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:56:56,578 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:56:56,579 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 11:56:56,580 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:11 [2020-12-09 11:56:56,671 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 11:56:56,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:56:56,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022312901] [2020-12-09 11:56:56,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:56:56,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 11:56:56,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893558411] [2020-12-09 11:56:56,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 11:56:56,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:56:56,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 11:56:56,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-09 11:56:56,673 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 10 states. [2020-12-09 11:56:57,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:56:57,526 INFO L93 Difference]: Finished difference Result 30 states and 29 transitions. [2020-12-09 11:56:57,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 11:56:57,526 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-09 11:56:57,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:56:57,527 INFO L225 Difference]: With dead ends: 30 [2020-12-09 11:56:57,527 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 11:56:57,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-12-09 11:56:57,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 11:56:57,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-12-09 11:56:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 11:56:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-09 11:56:57,529 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 13 [2020-12-09 11:56:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:56:57,529 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-09 11:56:57,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 11:56:57,529 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-09 11:56:57,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 11:56:57,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:56:57,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:56:57,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 11:56:57,732 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:56:57,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:56:57,733 INFO L82 PathProgramCache]: Analyzing trace with hash -323703277, now seen corresponding path program 1 times [2020-12-09 11:56:57,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:56:57,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150956164] [2020-12-09 11:56:57,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 11:56:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:56:57,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 11:56:57,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:56:57,838 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-09 11:56:57,838 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:56:57,848 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:56:57,849 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:56:57,849 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-09 11:56:57,878 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-09 11:56:57,879 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:56:57,885 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:56:57,886 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:56:57,886 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2020-12-09 11:56:57,915 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2020-12-09 11:56:57,916 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:56:57,918 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:56:57,918 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:56:57,918 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:5 [2020-12-09 11:56:57,959 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 11:56:57,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:56:57,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150956164] [2020-12-09 11:56:57,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:56:57,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 11:56:57,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580985658] [2020-12-09 11:56:57,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 11:56:57,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:56:57,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 11:56:57,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-09 11:56:57,960 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2020-12-09 11:56:58,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:56:58,417 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-09 11:56:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 11:56:58,419 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-12-09 11:56:58,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:56:58,419 INFO L225 Difference]: With dead ends: 27 [2020-12-09 11:56:58,419 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 11:56:58,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-12-09 11:56:58,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 11:56:58,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-12-09 11:56:58,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 11:56:58,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-09 11:56:58,422 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 14 [2020-12-09 11:56:58,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:56:58,422 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-09 11:56:58,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 11:56:58,423 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-09 11:56:58,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 11:56:58,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:56:58,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:56:58,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 11:56:58,624 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:56:58,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:56:58,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1431505607, now seen corresponding path program 1 times [2020-12-09 11:56:58,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:56:58,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338624575] [2020-12-09 11:56:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c11eb01-e1a1-4052-aa12-6826937bc6d2/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-09 11:56:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:56:58,699 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:56:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:56:58,745 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:56:58,768 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 11:56:58,768 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 11:56:58,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-09 11:56:59,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 11:56:59 BoogieIcfgContainer [2020-12-09 11:56:59,022 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 11:56:59,023 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 11:56:59,023 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 11:56:59,023 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 11:56:59,024 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:56:53" (3/4) ... [2020-12-09 11:56:59,026 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 11:56:59,026 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 11:56:59,027 INFO L168 Benchmark]: Toolchain (without parser) took 6764.21 ms. Allocated memory was 48.2 MB in the beginning and 86.0 MB in the end (delta: 37.7 MB). Free memory was 23.1 MB in the beginning and 45.9 MB in the end (delta: -22.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. [2020-12-09 11:56:59,027 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 48.2 MB. Free memory is still 30.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:56:59,028 INFO L168 Benchmark]: CACSL2BoogieTranslator took 383.19 ms. Allocated memory was 48.2 MB in the beginning and 71.3 MB in the end (delta: 23.1 MB). Free memory was 22.8 MB in the beginning and 42.1 MB in the end (delta: -19.2 MB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. [2020-12-09 11:56:59,028 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.83 ms. Allocated memory is still 71.3 MB. Free memory was 41.9 MB in the beginning and 40.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:56:59,028 INFO L168 Benchmark]: Boogie Preprocessor took 32.19 ms. Allocated memory is still 71.3 MB. Free memory was 40.1 MB in the beginning and 54.6 MB in the end (delta: -14.5 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-12-09 11:56:59,029 INFO L168 Benchmark]: RCFGBuilder took 389.37 ms. Allocated memory is still 71.3 MB. Free memory was 54.6 MB in the beginning and 33.6 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 11:56:59,029 INFO L168 Benchmark]: TraceAbstraction took 5906.61 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 33.2 MB in the beginning and 46.8 MB in the end (delta: -13.6 MB). Peak memory consumption was 252.9 kB. Max. memory is 16.1 GB. [2020-12-09 11:56:59,029 INFO L168 Benchmark]: Witness Printer took 3.19 ms. Allocated memory is still 86.0 MB. Free memory was 46.8 MB in the beginning and 45.9 MB in the end (delta: 854.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:56:59,031 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 48.2 MB. Free memory is still 30.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 383.19 ms. Allocated memory was 48.2 MB in the beginning and 71.3 MB in the end (delta: 23.1 MB). Free memory was 22.8 MB in the beginning and 42.1 MB in the end (delta: -19.2 MB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.83 ms. Allocated memory is still 71.3 MB. Free memory was 41.9 MB in the beginning and 40.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.19 ms. Allocated memory is still 71.3 MB. Free memory was 40.1 MB in the beginning and 54.6 MB in the end (delta: -14.5 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * RCFGBuilder took 389.37 ms. Allocated memory is still 71.3 MB. Free memory was 54.6 MB in the beginning and 33.6 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5906.61 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 33.2 MB in the beginning and 46.8 MB in the end (delta: -13.6 MB). Peak memory consumption was 252.9 kB. Max. memory is 16.1 GB. * Witness Printer took 3.19 ms. Allocated memory is still 86.0 MB. Free memory was 46.8 MB in the beginning and 45.9 MB in the end (delta: 854.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 543. Possible FailurePath: [L544] TData data; [L529] pdata->lo = malloc(16) [L530] pdata->hi = malloc(24) [L534] EXPR data->lo [L534] void *lo = data->lo; [L535] EXPR data->hi [L535] void *hi = data->hi; [L536] COND FALSE !(lo == hi) [L540] data->lo = (void *) 0 [L541] data->hi = (void *) 0 [L547] return 0; [L547] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 19 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.8s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 152 SDtfs, 400 SDslu, 130 SDs, 0 SdLazy, 368 SolverSat, 66 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 21 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 56 ConstructedInterpolants, 15 QuantifiedInterpolants, 5008 SizeOfPredicates, 66 NumberOfNonLiveVariables, 463 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...