./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple-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_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/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 621ace555bcaba2bfc5c3f9f05e7d0c3e0e54892 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/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 621ace555bcaba2bfc5c3f9f05e7d0c3e0e54892 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 12:31:29,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 12:31:29,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 12:31:29,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 12:31:29,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 12:31:29,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 12:31:29,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 12:31:29,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 12:31:29,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 12:31:29,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 12:31:29,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 12:31:29,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 12:31:29,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:31:29,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:31:29,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:31:29,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:31:29,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:31:29,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:31:29,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:31:29,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:31:29,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:31:29,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:31:29,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:31:29,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:31:29,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:31:29,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:31:29,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:31:29,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:31:29,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:31:29,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:31:29,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:31:29,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:31:29,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:31:29,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:31:29,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:31:29,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:31:29,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:31:29,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:31:29,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:31:29,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:31:29,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:31:29,657 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 12:31:29,679 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:31:29,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:31:29,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:31:29,681 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:31:29,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:31:29,681 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:31:29,681 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 12:31:29,681 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:31:29,682 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:31:29,682 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 12:31:29,682 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 12:31:29,682 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:31:29,682 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 12:31:29,682 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 12:31:29,683 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 12:31:29,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 12:31:29,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 12:31:29,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:31:29,684 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:31:29,684 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 12:31:29,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 12:31:29,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:31:29,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:31:29,685 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 12:31:29,685 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 12:31:29,685 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 12:31:29,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:31:29,685 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:31:29,685 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:31:29,686 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:31:29,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:31:29,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:31:29,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:31:29,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:31:29,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:31:29,687 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 12:31:29,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 12:31:29,687 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:31:29,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:31:29,688 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_2095dee7-0900-4003-b9fc-baec7cbd0d0b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 621ace555bcaba2bfc5c3f9f05e7d0c3e0e54892 [2020-12-09 12:31:29,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:31:29,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:31:29,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:31:29,870 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:31:29,871 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:31:29,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/../../sv-benchmarks/c/list-properties/simple-2.i [2020-12-09 12:31:29,913 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/data/81f16a4ac/c547817483934600a324dd227e8dfcc4/FLAGc341d4ba9 [2020-12-09 12:31:30,310 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:31:30,310 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/sv-benchmarks/c/list-properties/simple-2.i [2020-12-09 12:31:30,321 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/data/81f16a4ac/c547817483934600a324dd227e8dfcc4/FLAGc341d4ba9 [2020-12-09 12:31:30,331 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/data/81f16a4ac/c547817483934600a324dd227e8dfcc4 [2020-12-09 12:31:30,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:31:30,334 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:31:30,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:31:30,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:31:30,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:31:30,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:31:30" (1/1) ... [2020-12-09 12:31:30,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70b47c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:30, skipping insertion in model container [2020-12-09 12:31:30,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:31:30" (1/1) ... [2020-12-09 12:31:30,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:31:30,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:31:30,567 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2020-12-09 12:31:30,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:31:30,576 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:31:30,601 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2020-12-09 12:31:30,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:31:30,638 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:31:30,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:30 WrapperNode [2020-12-09 12:31:30,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:31:30,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:31:30,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:31:30,640 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:31:30,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:30" (1/1) ... [2020-12-09 12:31:30,655 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:30" (1/1) ... [2020-12-09 12:31:30,668 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:31:30,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:31:30,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:31:30,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:31:30,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:30" (1/1) ... [2020-12-09 12:31:30,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:30" (1/1) ... [2020-12-09 12:31:30,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:30" (1/1) ... [2020-12-09 12:31:30,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:30" (1/1) ... [2020-12-09 12:31:30,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:30" (1/1) ... [2020-12-09 12:31:30,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:30" (1/1) ... [2020-12-09 12:31:30,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:30" (1/1) ... [2020-12-09 12:31:30,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:31:30,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:31:30,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:31:30,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:31:30,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/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 12:31:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 12:31:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 12:31:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 12:31:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 12:31:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 12:31:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 12:31:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 12:31:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:31:30,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:31:31,051 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:31:31,051 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 12:31:31,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:31:31 BoogieIcfgContainer [2020-12-09 12:31:31,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:31:31,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:31:31,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:31:31,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:31:31,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:31:30" (1/3) ... [2020-12-09 12:31:31,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4992860d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:31:31, skipping insertion in model container [2020-12-09 12:31:31,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:30" (2/3) ... [2020-12-09 12:31:31,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4992860d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:31:31, skipping insertion in model container [2020-12-09 12:31:31,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:31:31" (3/3) ... [2020-12-09 12:31:31,058 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2020-12-09 12:31:31,068 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:31:31,071 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2020-12-09 12:31:31,078 INFO L253 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2020-12-09 12:31:31,092 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:31:31,092 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 12:31:31,092 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:31:31,092 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:31:31,092 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:31:31,092 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:31:31,092 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:31:31,092 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:31:31,102 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-12-09 12:31:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 12:31:31,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:31,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 12:31:31,107 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:31,111 INFO L82 PathProgramCache]: Analyzing trace with hash 3508933, now seen corresponding path program 1 times [2020-12-09 12:31:31,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:31:31,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204145605] [2020-12-09 12:31:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:31:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:31,220 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 12:31:31,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204145605] [2020-12-09 12:31:31,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:31:31,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:31:31,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337056752] [2020-12-09 12:31:31,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 12:31:31,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:31:31,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 12:31:31,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 12:31:31,234 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-12-09 12:31:31,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:31:31,243 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-12-09 12:31:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 12:31:31,243 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 12:31:31,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:31:31,248 INFO L225 Difference]: With dead ends: 35 [2020-12-09 12:31:31,249 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 12:31:31,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 12:31:31,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 12:31:31,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-09 12:31:31,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-09 12:31:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-09 12:31:31,271 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 4 [2020-12-09 12:31:31,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:31:31,271 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-09 12:31:31,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 12:31:31,271 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-09 12:31:31,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 12:31:31,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:31,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 12:31:31,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 12:31:31,272 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:31,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:31,272 INFO L82 PathProgramCache]: Analyzing trace with hash 108752166, now seen corresponding path program 1 times [2020-12-09 12:31:31,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:31:31,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388411187] [2020-12-09 12:31:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:31:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:31,312 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 12:31:31,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388411187] [2020-12-09 12:31:31,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:31:31,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:31:31,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152509816] [2020-12-09 12:31:31,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 12:31:31,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:31:31,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 12:31:31,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:31:31,314 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 4 states. [2020-12-09 12:31:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:31:31,372 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-09 12:31:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 12:31:31,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 12:31:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:31:31,373 INFO L225 Difference]: With dead ends: 39 [2020-12-09 12:31:31,373 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 12:31:31,373 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 12:31:31,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 12:31:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-12-09 12:31:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 12:31:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-12-09 12:31:31,377 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 5 [2020-12-09 12:31:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:31:31,377 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-12-09 12:31:31,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 12:31:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-12-09 12:31:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 12:31:31,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:31,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 12:31:31,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 12:31:31,378 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:31,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:31,378 INFO L82 PathProgramCache]: Analyzing trace with hash 108752167, now seen corresponding path program 1 times [2020-12-09 12:31:31,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:31:31,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666503664] [2020-12-09 12:31:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:31:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:31,420 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 12:31:31,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666503664] [2020-12-09 12:31:31,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:31:31,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:31:31,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874111923] [2020-12-09 12:31:31,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 12:31:31,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:31:31,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 12:31:31,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:31:31,421 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 4 states. [2020-12-09 12:31:31,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:31:31,477 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-12-09 12:31:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 12:31:31,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 12:31:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:31:31,478 INFO L225 Difference]: With dead ends: 44 [2020-12-09 12:31:31,479 INFO L226 Difference]: Without dead ends: 44 [2020-12-09 12:31:31,479 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 12:31:31,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-09 12:31:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-12-09 12:31:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-09 12:31:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-12-09 12:31:31,482 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 5 [2020-12-09 12:31:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:31:31,482 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-12-09 12:31:31,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 12:31:31,483 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-12-09 12:31:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 12:31:31,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:31,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:31:31,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 12:31:31,483 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:31,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:31,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1430494791, now seen corresponding path program 1 times [2020-12-09 12:31:31,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:31:31,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999895633] [2020-12-09 12:31:31,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:31:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:31,516 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 12:31:31,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999895633] [2020-12-09 12:31:31,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:31:31,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 12:31:31,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713119157] [2020-12-09 12:31:31,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 12:31:31,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:31:31,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 12:31:31,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:31:31,518 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 4 states. [2020-12-09 12:31:31,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:31:31,555 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-12-09 12:31:31,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 12:31:31,555 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 12:31:31,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:31:31,556 INFO L225 Difference]: With dead ends: 42 [2020-12-09 12:31:31,556 INFO L226 Difference]: Without dead ends: 42 [2020-12-09 12:31:31,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 12:31:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-09 12:31:31,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-12-09 12:31:31,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-09 12:31:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-12-09 12:31:31,559 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 8 [2020-12-09 12:31:31,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:31:31,559 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-12-09 12:31:31,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 12:31:31,560 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-12-09 12:31:31,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 12:31:31,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:31,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:31:31,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 12:31:31,560 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:31,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:31,561 INFO L82 PathProgramCache]: Analyzing trace with hash 314898583, now seen corresponding path program 1 times [2020-12-09 12:31:31,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:31:31,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851434670] [2020-12-09 12:31:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:31:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:31,621 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 12:31:31,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851434670] [2020-12-09 12:31:31,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:31:31,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 12:31:31,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839543856] [2020-12-09 12:31:31,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 12:31:31,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:31:31,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 12:31:31,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 12:31:31,623 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 6 states. [2020-12-09 12:31:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:31:31,689 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-09 12:31:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 12:31:31,689 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-09 12:31:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:31:31,690 INFO L225 Difference]: With dead ends: 46 [2020-12-09 12:31:31,690 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 12:31:31,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:31:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 12:31:31,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-12-09 12:31:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 12:31:31,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-12-09 12:31:31,695 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 10 [2020-12-09 12:31:31,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:31:31,696 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-12-09 12:31:31,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 12:31:31,696 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-12-09 12:31:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 12:31:31,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:31,697 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:31:31,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 12:31:31,697 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:31,698 INFO L82 PathProgramCache]: Analyzing trace with hash -953360382, now seen corresponding path program 1 times [2020-12-09 12:31:31,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:31:31,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379240441] [2020-12-09 12:31:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:31:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:31:31,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379240441] [2020-12-09 12:31:31,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:31:31,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 12:31:31,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420813064] [2020-12-09 12:31:31,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 12:31:31,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:31:31,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 12:31:31,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 12:31:31,742 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 5 states. [2020-12-09 12:31:31,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:31:31,799 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-12-09 12:31:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 12:31:31,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 12:31:31,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:31:31,800 INFO L225 Difference]: With dead ends: 53 [2020-12-09 12:31:31,800 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 12:31:31,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:31:31,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 12:31:31,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-12-09 12:31:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-09 12:31:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-12-09 12:31:31,803 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 11 [2020-12-09 12:31:31,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:31:31,804 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-12-09 12:31:31,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 12:31:31,804 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-12-09 12:31:31,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 12:31:31,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:31,804 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:31:31,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 12:31:31,804 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:31,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:31,805 INFO L82 PathProgramCache]: Analyzing trace with hash -953360381, now seen corresponding path program 1 times [2020-12-09 12:31:31,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:31:31,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022967875] [2020-12-09 12:31:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:31:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:31:31,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022967875] [2020-12-09 12:31:31,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:31:31,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 12:31:31,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23967337] [2020-12-09 12:31:31,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 12:31:31,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:31:31,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 12:31:31,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 12:31:31,851 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2020-12-09 12:31:31,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:31:31,932 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-12-09 12:31:31,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 12:31:31,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 12:31:31,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:31:31,933 INFO L225 Difference]: With dead ends: 48 [2020-12-09 12:31:31,933 INFO L226 Difference]: Without dead ends: 48 [2020-12-09 12:31:31,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 12:31:31,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-09 12:31:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2020-12-09 12:31:31,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-09 12:31:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-09 12:31:31,937 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 11 [2020-12-09 12:31:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:31:31,938 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-09 12:31:31,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 12:31:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-09 12:31:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 12:31:31,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:31,938 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:31:31,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 12:31:31,939 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:31,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1970000427, now seen corresponding path program 1 times [2020-12-09 12:31:31,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:31:31,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813955836] [2020-12-09 12:31:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:31:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:31:32,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813955836] [2020-12-09 12:31:32,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024557397] [2020-12-09 12:31:32,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:31:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:32,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 12:31:32,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:31:32,122 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 11 treesize of output 7 [2020-12-09 12:31:32,123 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:32,130 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:32,133 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 11 treesize of output 7 [2020-12-09 12:31:32,133 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:32,140 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:32,141 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 12:31:32,141 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-12-09 12:31:32,188 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 15 treesize of output 7 [2020-12-09 12:31:32,190 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:32,195 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:32,197 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 15 treesize of output 7 [2020-12-09 12:31:32,199 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:32,203 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:32,203 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 12:31:32,204 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-12-09 12:31:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:31:32,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:31:32,254 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 12:31:32,267 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 35 treesize of output 29 [2020-12-09 12:31:32,269 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-09 12:31:32,286 INFO L625 ElimStorePlain]: treesize reduction 27, result has 34.1 percent of original size [2020-12-09 12:31:32,286 INFO L515 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2020-12-09 12:31:32,288 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 12:31:32,290 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-12-09 12:31:32,290 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:22 [2020-12-09 12:31:32,348 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 12:31:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:31:32,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [136214814] [2020-12-09 12:31:32,365 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 12:31:32,366 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:31:32,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:31:32,373 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:31:32,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:31:32,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 12:31:32,714 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:31:33,073 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-12-09 12:31:33,231 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-12-09 12:31:33,698 WARN L197 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 82 [2020-12-09 12:31:33,974 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 78 [2020-12-09 12:31:34,281 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 82 [2020-12-09 12:31:34,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 12:31:34,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 7, 7] total 19 [2020-12-09 12:31:34,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390231136] [2020-12-09 12:31:34,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 12:31:34,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:31:34,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 12:31:34,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-12-09 12:31:34,325 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-12-09 12:31:34,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:31:34,408 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-12-09 12:31:34,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 12:31:34,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-09 12:31:34,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:31:34,409 INFO L225 Difference]: With dead ends: 40 [2020-12-09 12:31:34,409 INFO L226 Difference]: Without dead ends: 40 [2020-12-09 12:31:34,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-12-09 12:31:34,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-09 12:31:34,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-12-09 12:31:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 12:31:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-12-09 12:31:34,412 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 12 [2020-12-09 12:31:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:31:34,412 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-12-09 12:31:34,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 12:31:34,412 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-12-09 12:31:34,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 12:31:34,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:34,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:31:34,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-09 12:31:34,615 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:34,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:34,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1970001532, now seen corresponding path program 1 times [2020-12-09 12:31:34,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:31:34,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700019716] [2020-12-09 12:31:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:31:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:31:34,651 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:31:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:31:34,663 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:31:34,676 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 12:31:34,676 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 12:31:34,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-09 12:31:34,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:31:34 BoogieIcfgContainer [2020-12-09 12:31:34,693 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 12:31:34,693 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 12:31:34,694 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 12:31:34,694 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 12:31:34,694 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:31:31" (3/4) ... [2020-12-09 12:31:34,696 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 12:31:34,696 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 12:31:34,697 INFO L168 Benchmark]: Toolchain (without parser) took 4362.80 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 78.2 MB in the beginning and 90.0 MB in the end (delta: -11.8 MB). Peak memory consumption was 37.6 MB. Max. memory is 16.1 GB. [2020-12-09 12:31:34,697 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 113.2 MB. Free memory was 85.0 MB in the beginning and 84.9 MB in the end (delta: 31.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:31:34,697 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.33 ms. Allocated memory is still 113.2 MB. Free memory was 78.0 MB in the beginning and 76.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 12:31:34,698 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.00 ms. Allocated memory is still 113.2 MB. Free memory was 76.8 MB in the beginning and 75.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:31:34,698 INFO L168 Benchmark]: Boogie Preprocessor took 20.34 ms. Allocated memory is still 113.2 MB. Free memory was 74.8 MB in the beginning and 73.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:31:34,698 INFO L168 Benchmark]: RCFGBuilder took 362.95 ms. Allocated memory is still 113.2 MB. Free memory was 73.6 MB in the beginning and 47.6 MB in the end (delta: 26.0 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-12-09 12:31:34,699 INFO L168 Benchmark]: TraceAbstraction took 3639.41 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 47.0 MB in the beginning and 90.0 MB in the end (delta: -43.1 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2020-12-09 12:31:34,699 INFO L168 Benchmark]: Witness Printer took 2.50 ms. Allocated memory is still 163.6 MB. Free memory is still 90.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:31:34,701 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 113.2 MB. Free memory was 85.0 MB in the beginning and 84.9 MB in the end (delta: 31.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 304.33 ms. Allocated memory is still 113.2 MB. Free memory was 78.0 MB in the beginning and 76.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.00 ms. Allocated memory is still 113.2 MB. Free memory was 76.8 MB in the beginning and 75.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.34 ms. Allocated memory is still 113.2 MB. Free memory was 74.8 MB in the beginning and 73.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 362.95 ms. Allocated memory is still 113.2 MB. Free memory was 73.6 MB in the beginning and 47.6 MB in the end (delta: 26.0 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3639.41 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 47.0 MB in the beginning and 90.0 MB in the end (delta: -43.1 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * Witness Printer took 2.50 ms. Allocated memory is still 163.6 MB. Free memory is still 90.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 [L544] p->n = 0 [L545] p = a [L546] COND TRUE p!=0 [L547] EXPR p->h [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n [L550] p = p->n [L546] COND FALSE !(p!=0) [L552] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 16 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.5s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 161 SDtfs, 240 SDslu, 123 SDs, 0 SdLazy, 350 SolverSat, 82 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 48 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 6977 SizeOfPredicates, 8 NumberOfNonLiveVariables, 82 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 7/10 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: OVERALL_TIME[ms]: 348, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 10, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 17, TOOLS_POST_TIME[ms]: 186, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 17, TOOLS_QUANTIFIERELIM_TIME[ms]: 180, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 59, FLUID_QUERY_TIME[ms]: 7, FLUID_QUERIES: 32, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME[ms]: 110, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME[ms]: 0, DOMAIN_ISSUBSETEQ_APPLICATIONS: 1, DOMAIN_ISSUBSETEQ_TIME[ms]: 2, DOMAIN_ISBOTTOM_APPLICATIONS: 10, DOMAIN_ISBOTTOM_TIME[ms]: 15, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 12, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 12, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 1, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 1, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 7, DAG_COMPRESSION_PROCESSED_NODES: 124, DAG_COMPRESSION_RETAINED_NODES: 34, 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 12:31:36,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 12:31:36,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 12:31:36,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 12:31:36,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 12:31:36,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 12:31:36,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 12:31:36,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 12:31:36,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 12:31:36,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 12:31:36,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 12:31:36,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 12:31:36,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:31:36,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:31:36,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:31:36,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:31:36,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:31:36,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:31:36,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:31:36,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:31:36,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:31:36,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:31:36,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:31:36,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:31:36,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:31:36,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:31:36,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:31:36,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:31:36,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:31:36,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:31:36,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:31:36,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:31:36,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:31:36,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:31:36,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:31:36,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:31:36,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:31:36,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:31:36,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:31:36,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:31:36,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:31:36,256 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-12-09 12:31:36,282 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:31:36,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:31:36,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:31:36,283 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:31:36,283 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:31:36,283 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:31:36,284 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:31:36,284 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:31:36,284 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:31:36,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 12:31:36,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 12:31:36,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:31:36,285 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:31:36,285 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 12:31:36,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 12:31:36,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:31:36,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:31:36,285 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 12:31:36,286 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 12:31:36,286 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 12:31:36,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:31:36,286 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:31:36,286 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 12:31:36,286 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 12:31:36,286 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:31:36,287 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:31:36,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:31:36,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 12:31:36,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:31:36,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:31:36,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:31:36,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:31:36,288 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 12:31:36,288 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 12:31:36,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:31:36,288 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:31:36,288 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_2095dee7-0900-4003-b9fc-baec7cbd0d0b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 621ace555bcaba2bfc5c3f9f05e7d0c3e0e54892 [2020-12-09 12:31:36,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:31:36,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:31:36,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:31:36,540 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:31:36,541 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:31:36,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/../../sv-benchmarks/c/list-properties/simple-2.i [2020-12-09 12:31:36,589 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/data/ecca51efa/843d01241af94d9fb8cc8465f6200ff4/FLAG278d01f80 [2020-12-09 12:31:36,940 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:31:36,941 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/sv-benchmarks/c/list-properties/simple-2.i [2020-12-09 12:31:36,951 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/data/ecca51efa/843d01241af94d9fb8cc8465f6200ff4/FLAG278d01f80 [2020-12-09 12:31:37,316 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/data/ecca51efa/843d01241af94d9fb8cc8465f6200ff4 [2020-12-09 12:31:37,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:31:37,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:31:37,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:31:37,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:31:37,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:31:37,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:31:37" (1/1) ... [2020-12-09 12:31:37,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@568004f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:37, skipping insertion in model container [2020-12-09 12:31:37,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:31:37" (1/1) ... [2020-12-09 12:31:37,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:31:37,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:31:37,531 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2020-12-09 12:31:37,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:31:37,543 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:31:37,571 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2020-12-09 12:31:37,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:31:37,611 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:31:37,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:37 WrapperNode [2020-12-09 12:31:37,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:31:37,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:31:37,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:31:37,613 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:31:37,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:37" (1/1) ... [2020-12-09 12:31:37,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:37" (1/1) ... [2020-12-09 12:31:37,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:31:37,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:31:37,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:31:37,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:31:37,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:37" (1/1) ... [2020-12-09 12:31:37,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:37" (1/1) ... [2020-12-09 12:31:37,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:37" (1/1) ... [2020-12-09 12:31:37,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:37" (1/1) ... [2020-12-09 12:31:37,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:37" (1/1) ... [2020-12-09 12:31:37,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:37" (1/1) ... [2020-12-09 12:31:37,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:37" (1/1) ... [2020-12-09 12:31:37,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:31:37,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:31:37,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:31:37,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:31:37,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/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 12:31:37,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 12:31:37,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 12:31:37,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 12:31:37,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 12:31:37,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 12:31:37,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-09 12:31:37,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 12:31:37,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:31:37,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:31:38,018 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:31:38,018 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 12:31:38,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:31:38 BoogieIcfgContainer [2020-12-09 12:31:38,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:31:38,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:31:38,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:31:38,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:31:38,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:31:37" (1/3) ... [2020-12-09 12:31:38,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48dc76e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:31:38, skipping insertion in model container [2020-12-09 12:31:38,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:31:37" (2/3) ... [2020-12-09 12:31:38,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48dc76e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:31:38, skipping insertion in model container [2020-12-09 12:31:38,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:31:38" (3/3) ... [2020-12-09 12:31:38,024 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2020-12-09 12:31:38,033 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:31:38,037 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2020-12-09 12:31:38,045 INFO L253 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2020-12-09 12:31:38,058 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:31:38,059 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 12:31:38,059 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:31:38,059 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:31:38,059 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:31:38,059 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:31:38,059 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:31:38,059 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:31:38,068 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-12-09 12:31:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 12:31:38,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:38,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 12:31:38,073 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:38,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:38,077 INFO L82 PathProgramCache]: Analyzing trace with hash 889599230, now seen corresponding path program 1 times [2020-12-09 12:31:38,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:31:38,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512542142] [2020-12-09 12:31:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/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 12:31:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:38,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 12:31:38,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:31:38,204 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 12:31:38,205 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:38,209 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:38,210 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 12:31:38,210 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 12:31:38,225 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 12:31:38,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 12:31:38,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512542142] [2020-12-09 12:31:38,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:31:38,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 12:31:38,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029229212] [2020-12-09 12:31:38,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 12:31:38,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:31:38,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 12:31:38,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:31:38,242 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2020-12-09 12:31:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:31:38,384 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-12-09 12:31:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 12:31:38,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 12:31:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:31:38,393 INFO L225 Difference]: With dead ends: 51 [2020-12-09 12:31:38,393 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 12:31:38,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 12:31:38,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 12:31:38,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-12-09 12:31:38,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-09 12:31:38,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-12-09 12:31:38,424 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 6 [2020-12-09 12:31:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:31:38,424 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-12-09 12:31:38,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 12:31:38,424 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-12-09 12:31:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 12:31:38,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:38,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 12:31:38,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 12:31:38,627 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:38,630 INFO L82 PathProgramCache]: Analyzing trace with hash 889599231, now seen corresponding path program 1 times [2020-12-09 12:31:38,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:31:38,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875267665] [2020-12-09 12:31:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/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 12:31:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:38,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 12:31:38,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:31:38,793 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 12:31:38,794 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:38,799 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:38,800 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 12:31:38,800 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-09 12:31:38,825 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 12:31:38,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 12:31:38,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875267665] [2020-12-09 12:31:38,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:31:38,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 12:31:38,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330372027] [2020-12-09 12:31:38,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 12:31:38,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:31:38,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 12:31:38,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:31:38,828 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 4 states. [2020-12-09 12:31:38,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:31:38,978 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-12-09 12:31:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 12:31:38,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 12:31:38,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:31:38,980 INFO L225 Difference]: With dead ends: 54 [2020-12-09 12:31:38,980 INFO L226 Difference]: Without dead ends: 54 [2020-12-09 12:31:38,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 12:31:38,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-09 12:31:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-12-09 12:31:38,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-09 12:31:38,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-12-09 12:31:38,987 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 6 [2020-12-09 12:31:38,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:31:38,987 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-12-09 12:31:38,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 12:31:38,987 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-12-09 12:31:38,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 12:31:38,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:38,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:31:39,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 12:31:39,190 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:39,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:39,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1828101368, now seen corresponding path program 1 times [2020-12-09 12:31:39,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:31:39,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398214411] [2020-12-09 12:31:39,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/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 12:31:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:39,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 12:31:39,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:31:39,308 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 12:31:39,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 12:31:39,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398214411] [2020-12-09 12:31:39,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:31:39,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 12:31:39,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938708902] [2020-12-09 12:31:39,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 12:31:39,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:31:39,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 12:31:39,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:31:39,310 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 4 states. [2020-12-09 12:31:39,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:31:39,403 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-12-09 12:31:39,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 12:31:39,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 12:31:39,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:31:39,404 INFO L225 Difference]: With dead ends: 51 [2020-12-09 12:31:39,405 INFO L226 Difference]: Without dead ends: 51 [2020-12-09 12:31:39,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 12:31:39,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-09 12:31:39,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2020-12-09 12:31:39,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-09 12:31:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-12-09 12:31:39,408 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 11 [2020-12-09 12:31:39,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:31:39,409 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-12-09 12:31:39,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 12:31:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-12-09 12:31:39,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 12:31:39,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:39,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:31:39,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 12:31:39,610 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:39,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:39,611 INFO L82 PathProgramCache]: Analyzing trace with hash 836608451, now seen corresponding path program 1 times [2020-12-09 12:31:39,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:31:39,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242840808] [2020-12-09 12:31:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/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 12:31:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:39,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 12:31:39,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:31:39,700 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 11 treesize of output 7 [2020-12-09 12:31:39,701 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:39,710 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:39,711 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 12:31:39,711 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-12-09 12:31:39,744 INFO L348 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-12-09 12:31:39,744 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2020-12-09 12:31:39,746 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:39,748 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:39,748 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 12:31:39,749 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:9 [2020-12-09 12:31:39,774 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 15 treesize of output 7 [2020-12-09 12:31:39,775 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:39,777 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:39,778 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 12:31:39,778 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-09 12:31:39,789 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 12:31:39,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 12:31:39,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242840808] [2020-12-09 12:31:39,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:31:39,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 12:31:39,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563700179] [2020-12-09 12:31:39,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 12:31:39,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:31:39,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 12:31:39,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:31:39,791 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 7 states. [2020-12-09 12:31:40,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:31:40,042 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-12-09 12:31:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 12:31:40,043 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-09 12:31:40,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:31:40,043 INFO L225 Difference]: With dead ends: 82 [2020-12-09 12:31:40,043 INFO L226 Difference]: Without dead ends: 82 [2020-12-09 12:31:40,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-09 12:31:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-09 12:31:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 50. [2020-12-09 12:31:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-09 12:31:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-12-09 12:31:40,048 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 12 [2020-12-09 12:31:40,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:31:40,048 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-12-09 12:31:40,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 12:31:40,048 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-12-09 12:31:40,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 12:31:40,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:40,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:31:40,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 12:31:40,250 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:40,252 INFO L82 PathProgramCache]: Analyzing trace with hash 903973711, now seen corresponding path program 1 times [2020-12-09 12:31:40,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:31:40,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256079765] [2020-12-09 12:31:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/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 12:31:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:40,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 12:31:40,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:31:40,367 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 12:31:40,367 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:40,369 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:40,369 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 12:31:40,369 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 12:31:40,381 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 12:31:40,381 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:40,387 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:40,388 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 12:31:40,388 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:13 [2020-12-09 12:31:40,401 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 23 treesize of output 11 [2020-12-09 12:31:40,402 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:40,404 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:40,404 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 12:31:40,404 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:7 [2020-12-09 12:31:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:31:40,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 12:31:40,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256079765] [2020-12-09 12:31:40,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:31:40,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 12:31:40,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397610903] [2020-12-09 12:31:40,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 12:31:40,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:31:40,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 12:31:40,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 12:31:40,425 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 6 states. [2020-12-09 12:31:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:31:40,652 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-12-09 12:31:40,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 12:31:40,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-09 12:31:40,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:31:40,653 INFO L225 Difference]: With dead ends: 62 [2020-12-09 12:31:40,653 INFO L226 Difference]: Without dead ends: 62 [2020-12-09 12:31:40,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-09 12:31:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-09 12:31:40,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2020-12-09 12:31:40,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-09 12:31:40,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-12-09 12:31:40,657 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 13 [2020-12-09 12:31:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:31:40,657 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-12-09 12:31:40,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 12:31:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-12-09 12:31:40,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 12:31:40,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:40,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:31:40,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 12:31:40,859 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:40,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:40,860 INFO L82 PathProgramCache]: Analyzing trace with hash 903973712, now seen corresponding path program 1 times [2020-12-09 12:31:40,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:31:40,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404073938] [2020-12-09 12:31:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/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 12:31:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:40,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 12:31:40,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:31:40,977 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 12:31:40,977 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:40,981 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:40,982 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 12:31:40,982 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:11 [2020-12-09 12:31:40,999 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 12:31:41,000 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:41,011 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:41,015 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 12:31:41,016 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:41,025 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:41,027 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 12:31:41,027 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:23 [2020-12-09 12:31:41,051 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 12:31:41,052 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:41,061 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:41,063 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 12:31:41,063 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:41,067 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:41,068 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 12:31:41,068 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:9 [2020-12-09 12:31:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:31:41,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 12:31:41,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404073938] [2020-12-09 12:31:41,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:31:41,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 12:31:41,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130465240] [2020-12-09 12:31:41,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 12:31:41,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:31:41,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 12:31:41,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 12:31:41,091 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 6 states. [2020-12-09 12:31:41,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:31:41,388 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-12-09 12:31:41,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 12:31:41,388 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-09 12:31:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:31:41,389 INFO L225 Difference]: With dead ends: 58 [2020-12-09 12:31:41,389 INFO L226 Difference]: Without dead ends: 58 [2020-12-09 12:31:41,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-09 12:31:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-09 12:31:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 38. [2020-12-09 12:31:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-09 12:31:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-12-09 12:31:41,392 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 13 [2020-12-09 12:31:41,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:31:41,392 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-12-09 12:31:41,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 12:31:41,392 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-12-09 12:31:41,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 12:31:41,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:41,393 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:31:41,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 12:31:41,594 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:41,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:41,596 INFO L82 PathProgramCache]: Analyzing trace with hash -288017401, now seen corresponding path program 1 times [2020-12-09 12:31:41,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:31:41,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92844310] [2020-12-09 12:31:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/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 12:31:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:41,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 12:31:41,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:31:41,777 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 12:31:41,778 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:41,788 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:41,792 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 12:31:41,793 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:41,799 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:41,800 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 12:31:41,800 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-12-09 12:31:41,844 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 12:31:41,845 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:41,853 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:41,855 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 12:31:41,855 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:41,859 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:41,859 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 12:31:41,859 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-12-09 12:31:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:31:41,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:31:41,913 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 35 treesize of output 29 [2020-12-09 12:31:41,918 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-09 12:31:41,930 INFO L625 ElimStorePlain]: treesize reduction 19, result has 26.9 percent of original size [2020-12-09 12:31:41,930 INFO L515 ElimStorePlain]: Eliminatee |#memory_$Pointer$.base| vanished before elimination [2020-12-09 12:31:41,931 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-09 12:31:41,931 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2020-12-09 12:31:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:31:41,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92844310] [2020-12-09 12:31:41,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [734849169] [2020-12-09 12:31:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt [2020-12-09 12:31:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:42,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 12:31:42,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:31:42,054 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 12:31:42,054 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:42,064 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:42,066 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 12:31:42,067 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:42,075 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:42,075 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 12:31:42,075 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2020-12-09 12:31:42,136 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 15 treesize of output 7 [2020-12-09 12:31:42,137 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:42,144 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:42,146 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 15 treesize of output 7 [2020-12-09 12:31:42,148 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:42,152 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:42,152 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 12:31:42,153 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-12-09 12:31:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:31:42,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:31:42,178 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 35 treesize of output 29 [2020-12-09 12:31:42,180 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-09 12:31:42,194 INFO L625 ElimStorePlain]: treesize reduction 19, result has 26.9 percent of original size [2020-12-09 12:31:42,194 INFO L515 ElimStorePlain]: Eliminatee |#memory_$Pointer$.base| vanished before elimination [2020-12-09 12:31:42,195 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-09 12:31:42,195 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2020-12-09 12:31:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:31:42,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137878715] [2020-12-09 12:31:42,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:31:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:31:42,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 12:31:42,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:31:42,253 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 12:31:42,254 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:42,262 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:42,264 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 12:31:42,265 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:42,271 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:42,272 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 12:31:42,272 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2020-12-09 12:31:42,284 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 15 treesize of output 7 [2020-12-09 12:31:42,285 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:42,291 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:42,293 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 15 treesize of output 7 [2020-12-09 12:31:42,294 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 12:31:42,297 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 12:31:42,297 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 12:31:42,297 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-12-09 12:31:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:31:42,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:31:42,320 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 35 treesize of output 29 [2020-12-09 12:31:42,321 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-09 12:31:42,334 INFO L625 ElimStorePlain]: treesize reduction 19, result has 26.9 percent of original size [2020-12-09 12:31:42,334 INFO L515 ElimStorePlain]: Eliminatee |#memory_$Pointer$.base| vanished before elimination [2020-12-09 12:31:42,334 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-09 12:31:42,334 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2020-12-09 12:31:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:31:42,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 12:31:42,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8, 7] total 11 [2020-12-09 12:31:42,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000711139] [2020-12-09 12:31:42,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 12:31:42,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:31:42,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 12:31:42,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-09 12:31:42,340 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 11 states. [2020-12-09 12:31:42,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:31:42,650 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-12-09 12:31:42,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 12:31:42,650 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-09 12:31:42,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:31:42,651 INFO L225 Difference]: With dead ends: 53 [2020-12-09 12:31:42,651 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 12:31:42,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-12-09 12:31:42,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 12:31:42,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-12-09 12:31:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-09 12:31:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-12-09 12:31:42,654 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2020-12-09 12:31:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:31:42,654 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-12-09 12:31:42,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 12:31:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-12-09 12:31:42,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 12:31:42,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:31:42,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:31:43,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:31:43,258 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:31:43,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:31:43,259 INFO L82 PathProgramCache]: Analyzing trace with hash -338606125, now seen corresponding path program 1 times [2020-12-09 12:31:43,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:31:43,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525480284] [2020-12-09 12:31:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2095dee7-0900-4003-b9fc-baec7cbd0d0b/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-09 12:31:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:31:43,318 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:31:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:31:43,352 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:31:43,377 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 12:31:43,377 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 12:31:43,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-09 12:31:43,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:31:43 BoogieIcfgContainer [2020-12-09 12:31:43,600 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 12:31:43,600 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 12:31:43,600 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 12:31:43,600 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 12:31:43,601 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:31:38" (3/4) ... [2020-12-09 12:31:43,602 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 12:31:43,603 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 12:31:43,603 INFO L168 Benchmark]: Toolchain (without parser) took 6283.32 ms. Allocated memory was 65.0 MB in the beginning and 100.7 MB in the end (delta: 35.7 MB). Free memory was 46.8 MB in the beginning and 62.9 MB in the end (delta: -16.1 MB). Peak memory consumption was 19.5 MB. Max. memory is 16.1 GB. [2020-12-09 12:31:43,603 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 65.0 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:31:43,604 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.64 ms. Allocated memory is still 65.0 MB. Free memory was 46.6 MB in the beginning and 34.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 12:31:43,604 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.66 ms. Allocated memory is still 65.0 MB. Free memory was 34.9 MB in the beginning and 33.1 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:31:43,604 INFO L168 Benchmark]: Boogie Preprocessor took 22.15 ms. Allocated memory is still 65.0 MB. Free memory was 33.1 MB in the beginning and 31.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:31:43,604 INFO L168 Benchmark]: RCFGBuilder took 352.75 ms. Allocated memory was 65.0 MB in the beginning and 83.9 MB in the end (delta: 18.9 MB). Free memory was 31.5 MB in the beginning and 47.1 MB in the end (delta: -15.6 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2020-12-09 12:31:43,605 INFO L168 Benchmark]: TraceAbstraction took 5579.83 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 46.6 MB in the beginning and 62.9 MB in the end (delta: -16.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:31:43,605 INFO L168 Benchmark]: Witness Printer took 2.38 ms. Allocated memory is still 100.7 MB. Free memory is still 62.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:31:43,606 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 65.0 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 291.64 ms. Allocated memory is still 65.0 MB. Free memory was 46.6 MB in the beginning and 34.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.66 ms. Allocated memory is still 65.0 MB. Free memory was 34.9 MB in the beginning and 33.1 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.15 ms. Allocated memory is still 65.0 MB. Free memory was 33.1 MB in the beginning and 31.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 352.75 ms. Allocated memory was 65.0 MB in the beginning and 83.9 MB in the end (delta: 18.9 MB). Free memory was 31.5 MB in the beginning and 47.1 MB in the end (delta: -15.6 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5579.83 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 46.6 MB in the beginning and 62.9 MB in the end (delta: -16.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 2.38 ms. Allocated memory is still 100.7 MB. Free memory is still 62.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 [L544] p->n = 0 [L545] p = a [L546] COND TRUE p!=0 [L547] EXPR p->h [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n [L550] p = p->n [L546] COND FALSE !(p!=0) [L552] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 16 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.5s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 162 SDtfs, 397 SDslu, 305 SDs, 0 SdLazy, 577 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 97 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 122 NumberOfCodeBlocks, 122 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 139 ConstructedInterpolants, 0 QuantifiedInterpolants, 14336 SizeOfPredicates, 61 NumberOfNonLiveVariables, 490 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 8/14 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...