./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/count_down-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/count_down-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/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 3e28603c63113c1566dc2e06da17c63059f80486 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:53:30,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:53:30,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:53:30,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:53:30,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:53:30,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:53:30,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:53:30,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:53:30,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:53:30,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:53:30,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:53:30,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:53:30,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:53:30,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:53:30,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:53:30,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:53:30,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:53:30,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:53:30,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:53:30,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:53:30,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:53:30,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:53:30,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:53:30,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:53:30,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:53:30,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:53:30,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:53:30,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:53:30,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:53:30,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:53:30,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:53:30,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:53:30,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:53:30,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:53:30,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:53:30,619 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:53:30,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:53:30,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:53:30,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:53:30,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:53:30,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:53:30,627 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-22 12:53:30,664 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:53:30,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:53:30,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:53:30,666 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:53:30,667 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:53:30,667 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:53:30,667 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:53:30,667 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:53:30,668 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:53:30,668 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:53:30,669 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:53:30,669 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:53:30,670 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:53:30,670 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:53:30,670 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:53:30,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-22 12:53:30,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-22 12:53:30,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:53:30,672 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:53:30,672 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 12:53:30,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:53:30,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:53:30,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:53:30,673 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-22 12:53:30,673 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-22 12:53:30,673 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-22 12:53:30,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:53:30,675 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:53:30,676 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:53:30,676 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:53:30,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:53:30,677 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:53:30,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:53:30,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:53:30,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:53:30,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:53:30,678 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:53:30,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:53:30,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:53:30,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:53:30,683 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_5c3e52ba-a325-4e23-ae4e-4851555ede45/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e28603c63113c1566dc2e06da17c63059f80486 [2020-11-22 12:53:30,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:53:31,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:53:31,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:53:31,011 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:53:31,012 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:53:31,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/../../sv-benchmarks/c/array-memsafety/count_down-alloca-1.i [2020-11-22 12:53:31,067 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/data/413c95a1a/ddd7a386278a42a0be6fca18d1f65fdf/FLAG180514494 [2020-11-22 12:53:31,669 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:53:31,670 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/sv-benchmarks/c/array-memsafety/count_down-alloca-1.i [2020-11-22 12:53:31,683 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/data/413c95a1a/ddd7a386278a42a0be6fca18d1f65fdf/FLAG180514494 [2020-11-22 12:53:31,928 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/data/413c95a1a/ddd7a386278a42a0be6fca18d1f65fdf [2020-11-22 12:53:31,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:53:31,931 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:53:31,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:53:31,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:53:31,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:53:31,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:53:31" (1/1) ... [2020-11-22 12:53:31,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b5e10c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:31, skipping insertion in model container [2020-11-22 12:53:31,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:53:31" (1/1) ... [2020-11-22 12:53:31,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:53:31,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:53:32,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:53:32,359 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:53:32,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:53:32,489 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:53:32,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:32 WrapperNode [2020-11-22 12:53:32,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:53:32,491 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:53:32,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:53:32,492 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:53:32,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:32" (1/1) ... [2020-11-22 12:53:32,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:32" (1/1) ... [2020-11-22 12:53:32,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:53:32,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:53:32,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:53:32,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:53:32,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:32" (1/1) ... [2020-11-22 12:53:32,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:32" (1/1) ... [2020-11-22 12:53:32,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:32" (1/1) ... [2020-11-22 12:53:32,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:32" (1/1) ... [2020-11-22 12:53:32,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:32" (1/1) ... [2020-11-22 12:53:32,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:32" (1/1) ... [2020-11-22 12:53:32,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:32" (1/1) ... [2020-11-22 12:53:32,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:53:32,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:53:32,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:53:32,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:53:32,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:53:32,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 12:53:32,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 12:53:32,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:53:32,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 12:53:32,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:53:32,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:53:33,275 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:53:33,275 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-22 12:53:33,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:53:33 BoogieIcfgContainer [2020-11-22 12:53:33,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:53:33,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:53:33,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:53:33,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:53:33,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:53:31" (1/3) ... [2020-11-22 12:53:33,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff61b0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:53:33, skipping insertion in model container [2020-11-22 12:53:33,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:32" (2/3) ... [2020-11-22 12:53:33,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff61b0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:53:33, skipping insertion in model container [2020-11-22 12:53:33,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:53:33" (3/3) ... [2020-11-22 12:53:33,287 INFO L111 eAbstractionObserver]: Analyzing ICFG count_down-alloca-1.i [2020-11-22 12:53:33,299 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:53:33,303 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2020-11-22 12:53:33,338 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-11-22 12:53:33,381 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:53:33,382 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-22 12:53:33,383 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:53:33,383 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:53:33,383 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:53:33,383 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:53:33,383 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:53:33,383 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:53:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-11-22 12:53:33,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 12:53:33,403 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:33,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 12:53:33,404 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 12:53:33,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:33,410 INFO L82 PathProgramCache]: Analyzing trace with hash 111923, now seen corresponding path program 1 times [2020-11-22 12:53:33,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:53:33,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097709666] [2020-11-22 12:53:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:53:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:33,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097709666] [2020-11-22 12:53:33,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:53:33,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:53:33,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156327082] [2020-11-22 12:53:33,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:53:33,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:53:33,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:53:33,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:53:33,601 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-11-22 12:53:33,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:33,663 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-11-22 12:53:33,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:53:33,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-22 12:53:33,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:33,672 INFO L225 Difference]: With dead ends: 21 [2020-11-22 12:53:33,672 INFO L226 Difference]: Without dead ends: 20 [2020-11-22 12:53:33,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:53:33,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-22 12:53:33,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-22 12:53:33,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-22 12:53:33,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-22 12:53:33,715 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 3 [2020-11-22 12:53:33,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:33,716 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-22 12:53:33,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:53:33,716 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-22 12:53:33,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 12:53:33,717 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:33,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 12:53:33,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:53:33,717 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 12:53:33,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:33,722 INFO L82 PathProgramCache]: Analyzing trace with hash 3471937, now seen corresponding path program 1 times [2020-11-22 12:53:33,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:53:33,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617097049] [2020-11-22 12:53:33,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:53:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:33,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617097049] [2020-11-22 12:53:33,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:53:33,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 12:53:33,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136923517] [2020-11-22 12:53:33,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:53:33,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:53:33,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:53:33,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:53:33,797 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 3 states. [2020-11-22 12:53:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:33,866 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-11-22 12:53:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:53:33,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-22 12:53:33,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:33,867 INFO L225 Difference]: With dead ends: 16 [2020-11-22 12:53:33,867 INFO L226 Difference]: Without dead ends: 16 [2020-11-22 12:53:33,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:53:33,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-22 12:53:33,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-22 12:53:33,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-22 12:53:33,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-11-22 12:53:33,871 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 4 [2020-11-22 12:53:33,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:33,871 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-11-22 12:53:33,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:53:33,871 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-11-22 12:53:33,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 12:53:33,872 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:33,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 12:53:33,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:53:33,872 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 12:53:33,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:33,873 INFO L82 PathProgramCache]: Analyzing trace with hash 3471938, now seen corresponding path program 1 times [2020-11-22 12:53:33,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:53:33,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534777076] [2020-11-22 12:53:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:53:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:34,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534777076] [2020-11-22 12:53:34,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:53:34,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:53:34,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710983750] [2020-11-22 12:53:34,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:53:34,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:53:34,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:53:34,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:53:34,009 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2020-11-22 12:53:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:34,145 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-11-22 12:53:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:53:34,145 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-11-22 12:53:34,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:34,146 INFO L225 Difference]: With dead ends: 34 [2020-11-22 12:53:34,146 INFO L226 Difference]: Without dead ends: 34 [2020-11-22 12:53:34,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:53:34,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-22 12:53:34,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 18. [2020-11-22 12:53:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-22 12:53:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-11-22 12:53:34,151 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 4 [2020-11-22 12:53:34,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:34,151 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-11-22 12:53:34,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:53:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-11-22 12:53:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:53:34,152 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:34,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:53:34,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:53:34,153 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 12:53:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:34,153 INFO L82 PathProgramCache]: Analyzing trace with hash 107635795, now seen corresponding path program 1 times [2020-11-22 12:53:34,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:53:34,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746955782] [2020-11-22 12:53:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:53:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:34,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746955782] [2020-11-22 12:53:34,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:53:34,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:53:34,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995853835] [2020-11-22 12:53:34,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:53:34,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:53:34,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:53:34,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:53:34,223 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2020-11-22 12:53:34,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:34,244 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2020-11-22 12:53:34,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:53:34,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-22 12:53:34,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:34,245 INFO L225 Difference]: With dead ends: 18 [2020-11-22 12:53:34,245 INFO L226 Difference]: Without dead ends: 18 [2020-11-22 12:53:34,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:53:34,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-22 12:53:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-22 12:53:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-22 12:53:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-11-22 12:53:34,249 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 5 [2020-11-22 12:53:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:34,249 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-11-22 12:53:34,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:53:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-11-22 12:53:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 12:53:34,250 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:34,250 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2020-11-22 12:53:34,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 12:53:34,250 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 12:53:34,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:34,251 INFO L82 PathProgramCache]: Analyzing trace with hash -958385061, now seen corresponding path program 1 times [2020-11-22 12:53:34,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:53:34,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394905136] [2020-11-22 12:53:34,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:53:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:34,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394905136] [2020-11-22 12:53:34,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484692152] [2020-11-22 12:53:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:53:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:34,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-22 12:53:34,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:53:34,485 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2020-11-22 12:53:34,486 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 12:53:34,494 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 12:53:34,494 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-22 12:53:34,495 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2020-11-22 12:53:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:34,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:53:34,659 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-22 12:53:34,711 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:53:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:34,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1861040738] [2020-11-22 12:53:34,772 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-11-22 12:53:34,772 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:53:34,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:53:34,783 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:53:34,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:53:35,028 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:35,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:35,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:35,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:35,323 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:53:35,471 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2020-11-22 12:53:35,608 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-11-22 12:53:35,818 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:53:35,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 12:53:35,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2020-11-22 12:53:35,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648267834] [2020-11-22 12:53:35,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-22 12:53:35,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:53:35,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-22 12:53:35,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-22 12:53:35,821 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 13 states. [2020-11-22 12:53:35,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:35,994 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2020-11-22 12:53:35,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 12:53:35,997 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 6 [2020-11-22 12:53:35,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:35,998 INFO L225 Difference]: With dead ends: 17 [2020-11-22 12:53:35,998 INFO L226 Difference]: Without dead ends: 17 [2020-11-22 12:53:35,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-22 12:53:35,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-22 12:53:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-11-22 12:53:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-22 12:53:36,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-11-22 12:53:36,002 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 6 [2020-11-22 12:53:36,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:36,002 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-11-22 12:53:36,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-22 12:53:36,002 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-11-22 12:53:36,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 12:53:36,003 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:36,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:53:36,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:53:36,204 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 12:53:36,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:36,205 INFO L82 PathProgramCache]: Analyzing trace with hash 354839898, now seen corresponding path program 1 times [2020-11-22 12:53:36,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:53:36,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304833088] [2020-11-22 12:53:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:53:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:36,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304833088] [2020-11-22 12:53:36,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928201012] [2020-11-22 12:53:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:53:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:36,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-22 12:53:36,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:53:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:36,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:53:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:36,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1590478096] [2020-11-22 12:53:36,388 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-22 12:53:36,388 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:53:36,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:53:36,389 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:53:36,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:53:36,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:36,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:36,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:36,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:36,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:36,697 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:53:36,841 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-11-22 12:53:37,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-22 12:53:37,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5, 5] total 12 [2020-11-22 12:53:37,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004167035] [2020-11-22 12:53:37,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:53:37,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:53:37,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:53:37,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-11-22 12:53:37,151 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-11-22 12:53:37,284 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-11-22 12:53:37,441 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-11-22 12:53:37,573 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-11-22 12:53:37,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:37,654 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-22 12:53:37,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:53:37,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-11-22 12:53:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:37,656 INFO L225 Difference]: With dead ends: 22 [2020-11-22 12:53:37,656 INFO L226 Difference]: Without dead ends: 22 [2020-11-22 12:53:37,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-11-22 12:53:37,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-22 12:53:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-11-22 12:53:37,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-22 12:53:37,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-11-22 12:53:37,658 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2020-11-22 12:53:37,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:37,659 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-11-22 12:53:37,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:53:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-11-22 12:53:37,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 12:53:37,659 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:37,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:53:37,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:53:37,860 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 12:53:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:37,862 INFO L82 PathProgramCache]: Analyzing trace with hash -893339667, now seen corresponding path program 1 times [2020-11-22 12:53:37,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:53:37,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704743911] [2020-11-22 12:53:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:53:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 12:53:37,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704743911] [2020-11-22 12:53:37,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:53:37,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:53:37,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414797020] [2020-11-22 12:53:37,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:53:37,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:53:37,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:53:37,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:53:37,950 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2020-11-22 12:53:37,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:37,962 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-11-22 12:53:37,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:53:37,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-22 12:53:37,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:37,964 INFO L225 Difference]: With dead ends: 20 [2020-11-22 12:53:37,964 INFO L226 Difference]: Without dead ends: 19 [2020-11-22 12:53:37,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:53:37,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-22 12:53:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-22 12:53:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-22 12:53:37,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-11-22 12:53:37,968 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2020-11-22 12:53:37,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:37,968 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-11-22 12:53:37,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:53:37,969 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-11-22 12:53:37,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 12:53:37,969 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:37,970 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:53:37,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-22 12:53:37,970 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 12:53:37,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:37,970 INFO L82 PathProgramCache]: Analyzing trace with hash -893341054, now seen corresponding path program 1 times [2020-11-22 12:53:37,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:53:37,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060815432] [2020-11-22 12:53:37,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:53:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:38,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060815432] [2020-11-22 12:53:38,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638506621] [2020-11-22 12:53:38,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:53:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:38,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-22 12:53:38,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:53:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:38,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:53:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:38,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1464226463] [2020-11-22 12:53:38,166 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 12:53:38,166 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:53:38,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:53:38,167 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:53:38,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:53:38,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:38,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:38,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:38,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:38,623 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:53:38,863 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-11-22 12:53:39,468 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-11-22 12:53:39,612 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-22 12:53:39,613 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:53:39,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 12:53:39,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2020-11-22 12:53:39,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110329541] [2020-11-22 12:53:39,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-22 12:53:39,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:53:39,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-22 12:53:39,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-11-22 12:53:39,615 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 10 states. [2020-11-22 12:53:39,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:39,711 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-11-22 12:53:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:53:39,712 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2020-11-22 12:53:39,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:39,713 INFO L225 Difference]: With dead ends: 29 [2020-11-22 12:53:39,713 INFO L226 Difference]: Without dead ends: 22 [2020-11-22 12:53:39,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-11-22 12:53:39,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-22 12:53:39,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-11-22 12:53:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-22 12:53:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-11-22 12:53:39,720 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 11 [2020-11-22 12:53:39,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:39,720 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-11-22 12:53:39,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-22 12:53:39,720 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-11-22 12:53:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 12:53:39,721 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:39,721 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:53:39,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-22 12:53:39,922 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 12:53:39,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:39,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1725798985, now seen corresponding path program 2 times [2020-11-22 12:53:39,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:53:39,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345115333] [2020-11-22 12:53:39,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:53:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:40,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345115333] [2020-11-22 12:53:40,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920412080] [2020-11-22 12:53:40,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:53:40,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-22 12:53:40,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 12:53:40,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-22 12:53:40,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:53:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 12:53:40,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:53:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 12:53:40,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [788487602] [2020-11-22 12:53:40,357 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 12:53:40,357 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:53:40,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:53:40,358 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:53:40,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:53:40,486 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:40,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:40,758 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:53:41,812 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-22 12:53:41,813 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:53:41,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 12:53:41,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2020-11-22 12:53:41,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877594930] [2020-11-22 12:53:41,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-22 12:53:41,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:53:41,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-22 12:53:41,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-11-22 12:53:41,815 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 17 states. [2020-11-22 12:53:42,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:42,339 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-11-22 12:53:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-22 12:53:42,340 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-11-22 12:53:42,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:42,340 INFO L225 Difference]: With dead ends: 35 [2020-11-22 12:53:42,340 INFO L226 Difference]: Without dead ends: 35 [2020-11-22 12:53:42,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=230, Invalid=826, Unknown=0, NotChecked=0, Total=1056 [2020-11-22 12:53:42,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-22 12:53:42,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-11-22 12:53:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-22 12:53:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-11-22 12:53:42,345 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 13 [2020-11-22 12:53:42,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:42,345 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-11-22 12:53:42,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-22 12:53:42,346 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-11-22 12:53:42,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-22 12:53:42,346 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:42,347 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1] [2020-11-22 12:53:42,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:53:42,558 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 12:53:42,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:42,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1916404094, now seen corresponding path program 3 times [2020-11-22 12:53:42,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:53:42,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533271532] [2020-11-22 12:53:42,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:53:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:42,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533271532] [2020-11-22 12:53:42,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52602601] [2020-11-22 12:53:42,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:53:42,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-22 12:53:42,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 12:53:42,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-22 12:53:42,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:53:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-22 12:53:42,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:53:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-22 12:53:42,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1691944721] [2020-11-22 12:53:42,868 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 12:53:42,868 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:53:42,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:53:42,869 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:53:42,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:53:42,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:42,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:43,142 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:53:43,274 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2020-11-22 12:53:43,991 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-11-22 12:53:44,135 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:53:44,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 12:53:44,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2020-11-22 12:53:44,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563728067] [2020-11-22 12:53:44,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-22 12:53:44,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:53:44,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-22 12:53:44,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-11-22 12:53:44,137 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 15 states. [2020-11-22 12:53:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:44,283 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-11-22 12:53:44,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 12:53:44,283 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-11-22 12:53:44,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:44,284 INFO L225 Difference]: With dead ends: 50 [2020-11-22 12:53:44,284 INFO L226 Difference]: Without dead ends: 37 [2020-11-22 12:53:44,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-11-22 12:53:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-22 12:53:44,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-11-22 12:53:44,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-22 12:53:44,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-11-22 12:53:44,289 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 25 [2020-11-22 12:53:44,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:44,289 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-11-22 12:53:44,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-22 12:53:44,289 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-11-22 12:53:44,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-22 12:53:44,290 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:44,290 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2020-11-22 12:53:44,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:53:44,507 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 12:53:44,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:44,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1622000119, now seen corresponding path program 4 times [2020-11-22 12:53:44,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:53:44,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089901449] [2020-11-22 12:53:44,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:53:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:44,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089901449] [2020-11-22 12:53:44,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925641860] [2020-11-22 12:53:44,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:53:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:44,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-22 12:53:44,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:53:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 12:53:44,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:53:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 12:53:44,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355200737] [2020-11-22 12:53:44,859 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 12:53:44,860 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:53:44,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:53:44,861 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:53:44,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:53:44,967 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:44,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:45,268 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:53:45,399 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2020-11-22 12:53:45,950 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-11-22 12:53:46,100 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:53:46,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 12:53:46,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2020-11-22 12:53:46,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598395209] [2020-11-22 12:53:46,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-22 12:53:46,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:53:46,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-22 12:53:46,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-11-22 12:53:46,103 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 17 states. [2020-11-22 12:53:46,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:46,341 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-11-22 12:53:46,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-22 12:53:46,342 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-11-22 12:53:46,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:46,343 INFO L225 Difference]: With dead ends: 58 [2020-11-22 12:53:46,343 INFO L226 Difference]: Without dead ends: 39 [2020-11-22 12:53:46,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-11-22 12:53:46,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-22 12:53:46,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-11-22 12:53:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-22 12:53:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-11-22 12:53:46,348 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 27 [2020-11-22 12:53:46,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:46,348 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-11-22 12:53:46,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-22 12:53:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-11-22 12:53:46,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-22 12:53:46,349 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:46,350 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2020-11-22 12:53:46,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-11-22 12:53:46,560 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 12:53:46,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:46,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2127345616, now seen corresponding path program 5 times [2020-11-22 12:53:46,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:53:46,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406549893] [2020-11-22 12:53:46,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:53:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:46,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406549893] [2020-11-22 12:53:46,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083530917] [2020-11-22 12:53:46,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:53:46,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-22 12:53:46,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 12:53:46,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-22 12:53:46,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:53:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-22 12:53:46,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:53:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-22 12:53:47,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1565392939] [2020-11-22 12:53:47,165 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 12:53:47,165 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:53:47,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:53:47,166 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:53:47,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:53:47,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:47,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:53:47,443 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:53:47,628 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2020-11-22 12:53:48,276 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:53:48,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 12:53:48,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 22 [2020-11-22 12:53:48,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427989094] [2020-11-22 12:53:48,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-22 12:53:48,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:53:48,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-22 12:53:48,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2020-11-22 12:53:48,278 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 22 states. [2020-11-22 12:53:49,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:49,192 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2020-11-22 12:53:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-22 12:53:49,194 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2020-11-22 12:53:49,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:49,195 INFO L225 Difference]: With dead ends: 67 [2020-11-22 12:53:49,195 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:53:49,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=389, Invalid=1963, Unknown=0, NotChecked=0, Total=2352 [2020-11-22 12:53:49,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:53:49,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:53:49,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:53:49,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:53:49,197 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-11-22 12:53:49,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:49,198 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:53:49,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-22 12:53:49,198 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:53:49,198 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:53:49,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:53:49,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:53:49 BoogieIcfgContainer [2020-11-22 12:53:49,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:53:49,416 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:53:49,416 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:53:49,416 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:53:49,417 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:53:33" (3/4) ... [2020-11-22 12:53:49,420 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:53:49,446 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-11-22 12:53:49,446 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-22 12:53:49,447 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 12:53:49,498 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5c3e52ba-a325-4e23-ae4e-4851555ede45/bin/utaipan/witness.graphml [2020-11-22 12:53:49,498 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:53:49,499 INFO L168 Benchmark]: Toolchain (without parser) took 17567.72 ms. Allocated memory was 98.6 MB in the beginning and 283.1 MB in the end (delta: 184.5 MB). Free memory was 73.0 MB in the beginning and 184.2 MB in the end (delta: -111.1 MB). Peak memory consumption was 74.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:49,499 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 98.6 MB. Free memory is still 56.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:53:49,500 INFO L168 Benchmark]: CACSL2BoogieTranslator took 557.31 ms. Allocated memory was 98.6 MB in the beginning and 134.2 MB in the end (delta: 35.7 MB). Free memory was 72.8 MB in the beginning and 100.6 MB in the end (delta: -27.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:49,500 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.99 ms. Allocated memory is still 134.2 MB. Free memory was 100.6 MB in the beginning and 98.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:49,500 INFO L168 Benchmark]: Boogie Preprocessor took 38.42 ms. Allocated memory is still 134.2 MB. Free memory was 98.8 MB in the beginning and 97.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:53:49,500 INFO L168 Benchmark]: RCFGBuilder took 691.64 ms. Allocated memory is still 134.2 MB. Free memory was 97.4 MB in the beginning and 73.6 MB in the end (delta: 23.8 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:49,501 INFO L168 Benchmark]: TraceAbstraction took 16135.60 ms. Allocated memory was 134.2 MB in the beginning and 283.1 MB in the end (delta: 148.9 MB). Free memory was 73.3 MB in the beginning and 187.3 MB in the end (delta: -114.0 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:49,501 INFO L168 Benchmark]: Witness Printer took 82.58 ms. Allocated memory is still 283.1 MB. Free memory was 187.3 MB in the beginning and 184.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:49,504 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 98.6 MB. Free memory is still 56.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 557.31 ms. Allocated memory was 98.6 MB in the beginning and 134.2 MB in the end (delta: 35.7 MB). Free memory was 72.8 MB in the beginning and 100.6 MB in the end (delta: -27.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.99 ms. Allocated memory is still 134.2 MB. Free memory was 100.6 MB in the beginning and 98.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.42 ms. Allocated memory is still 134.2 MB. Free memory was 98.8 MB in the beginning and 97.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 691.64 ms. Allocated memory is still 134.2 MB. Free memory was 97.4 MB in the beginning and 73.6 MB in the end (delta: 23.8 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16135.60 ms. Allocated memory was 134.2 MB in the beginning and 283.1 MB in the end (delta: 148.9 MB). Free memory was 73.3 MB in the beginning and 187.3 MB in the end (delta: -114.0 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * Witness Printer took 82.58 ms. Allocated memory is still 283.1 MB. Free memory was 187.3 MB in the beginning and 184.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 512]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 9 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16.0s, OverallIterations: 12, TraceHistogramMax: 5, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 94 SDtfs, 550 SDslu, 226 SDs, 0 SdLazy, 846 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 448 GetRequests, 258 SyntacticMatches, 3 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 8.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=11, 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, 12 MinimizatonAttempts, 22 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 263 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 355 ConstructedInterpolants, 0 QuantifiedInterpolants, 50518 SizeOfPredicates, 34 NumberOfNonLiveVariables, 411 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 26 InterpolantComputations, 5 PerfectInterpolantSequences, 277/413 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]: 309, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 5, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME[ms]: 245, 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: 9, TOOLS_QUANTIFIERELIM_TIME[ms]: 241, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 122, FLUID_QUERY_TIME[ms]: 1, FLUID_QUERIES: 20, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 47, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME[ms]: 5, DOMAIN_ISBOTTOM_APPLICATIONS: 5, DOMAIN_ISBOTTOM_TIME[ms]: 6, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 217, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 217, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, 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]: 0, PATH_EXPR_TIME[ms]: 0, REGEX_TO_DAG_TIME[ms]: 0, DAG_COMPRESSION_TIME[ms]: 2, DAG_COMPRESSION_PROCESSED_NODES: 39, DAG_COMPRESSION_RETAINED_NODES: 21, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...