./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c --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_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/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 32d9f155778c5c4efaa55d37fdad329bb0d271b5 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:24:49,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:24:49,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:24:49,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:24:49,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:24:49,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:24:49,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:24:49,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:24:49,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:24:49,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:24:49,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:24:49,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:24:49,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:24:49,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:24:49,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:24:49,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:24:49,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:24:49,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:24:49,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:24:49,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:24:49,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:24:49,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:24:49,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:24:49,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:24:49,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:24:49,546 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:24:49,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:24:49,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:24:49,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:24:49,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:24:49,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:24:49,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:24:49,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:24:49,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:24:49,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:24:49,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:24:49,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:24:49,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:24:49,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:24:49,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:24:49,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:24:49,562 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:24:49,591 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:24:49,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:24:49,592 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:24:49,592 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:24:49,592 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:24:49,593 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:24:49,593 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:24:49,593 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:24:49,593 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:24:49,593 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:24:49,594 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:24:49,594 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:24:49,594 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:24:49,594 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:24:49,595 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:24:49,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:24:49,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:24:49,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:24:49,596 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:24:49,596 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:24:49,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:24:49,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:24:49,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:24:49,597 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:24:49,597 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:24:49,597 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:24:49,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:24:49,598 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:24:49,598 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:24:49,598 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:24:49,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:24:49,598 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:24:49,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:24:49,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:24:49,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:24:49,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:24:49,600 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:24:49,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:24:49,600 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:24:49,600 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:24:49,600 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_f281b0e1-7a5b-407a-9877-40626df74843/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32d9f155778c5c4efaa55d37fdad329bb0d271b5 [2020-11-28 07:24:49,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:24:49,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:24:49,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:24:49,881 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:24:49,882 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:24:49,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2020-11-28 07:24:49,966 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan/data/5e5c635a4/5ec1ba7db60e414ebf5f6ade912b7645/FLAG43a10f91c [2020-11-28 07:24:50,410 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:24:50,411 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2020-11-28 07:24:50,417 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan/data/5e5c635a4/5ec1ba7db60e414ebf5f6ade912b7645/FLAG43a10f91c [2020-11-28 07:24:50,809 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan/data/5e5c635a4/5ec1ba7db60e414ebf5f6ade912b7645 [2020-11-28 07:24:50,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:24:50,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:24:50,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:24:50,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:24:50,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:24:50,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:24:50" (1/1) ... [2020-11-28 07:24:50,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f3f0b7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:50, skipping insertion in model container [2020-11-28 07:24:50,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:24:50" (1/1) ... [2020-11-28 07:24:50,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:24:50,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:24:51,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:24:51,010 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:24:51,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:24:51,041 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:24:51,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:51 WrapperNode [2020-11-28 07:24:51,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:24:51,043 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:24:51,043 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:24:51,044 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:24:51,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:51" (1/1) ... [2020-11-28 07:24:51,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:51" (1/1) ... [2020-11-28 07:24:51,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:24:51,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:24:51,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:24:51,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:24:51,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:51" (1/1) ... [2020-11-28 07:24:51,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:51" (1/1) ... [2020-11-28 07:24:51,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:51" (1/1) ... [2020-11-28 07:24:51,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:51" (1/1) ... [2020-11-28 07:24:51,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:51" (1/1) ... [2020-11-28 07:24:51,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:51" (1/1) ... [2020-11-28 07:24:51,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:51" (1/1) ... [2020-11-28 07:24:51,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:24:51,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:24:51,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:24:51,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:24:51,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/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 [2020-11-28 07:24:51,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:24:51,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:24:51,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:24:51,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:24:51,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:24:51,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:24:51,605 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:24:51,606 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:24:51,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:51 BoogieIcfgContainer [2020-11-28 07:24:51,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:24:51,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:24:51,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:24:51,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:24:51,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:24:50" (1/3) ... [2020-11-28 07:24:51,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb23b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:24:51, skipping insertion in model container [2020-11-28 07:24:51,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:51" (2/3) ... [2020-11-28 07:24:51,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb23b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:24:51, skipping insertion in model container [2020-11-28 07:24:51,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:51" (3/3) ... [2020-11-28 07:24:51,617 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5.c [2020-11-28 07:24:51,627 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:24:51,632 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-28 07:24:51,653 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-28 07:24:51,706 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:24:51,707 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:24:51,707 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:24:51,707 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:24:51,707 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:24:51,707 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:24:51,707 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:24:51,708 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:24:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-11-28 07:24:51,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:24:51,727 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:51,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:24:51,728 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:51,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:51,734 INFO L82 PathProgramCache]: Analyzing trace with hash 3150815, now seen corresponding path program 1 times [2020-11-28 07:24:51,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:51,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112549452] [2020-11-28 07:24:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:51,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112549452] [2020-11-28 07:24:51,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:51,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:24:51,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051444118] [2020-11-28 07:24:51,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:24:51,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:51,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:24:51,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:24:51,904 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-11-28 07:24:51,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:51,974 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-11-28 07:24:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:24:51,976 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:24:51,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:51,983 INFO L225 Difference]: With dead ends: 37 [2020-11-28 07:24:51,983 INFO L226 Difference]: Without dead ends: 35 [2020-11-28 07:24:51,984 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 [2020-11-28 07:24:52,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-28 07:24:52,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2020-11-28 07:24:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 07:24:52,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-28 07:24:52,034 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-11-28 07:24:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:52,035 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-28 07:24:52,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:24:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-28 07:24:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:24:52,036 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:52,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:24:52,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:24:52,038 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:52,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:52,042 INFO L82 PathProgramCache]: Analyzing trace with hash 3078660, now seen corresponding path program 1 times [2020-11-28 07:24:52,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:52,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142181227] [2020-11-28 07:24:52,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:52,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142181227] [2020-11-28 07:24:52,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:52,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:24:52,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299888659] [2020-11-28 07:24:52,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:24:52,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:52,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:24:52,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:24:52,131 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-11-28 07:24:52,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:52,227 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-11-28 07:24:52,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:24:52,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-28 07:24:52,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:52,231 INFO L225 Difference]: With dead ends: 45 [2020-11-28 07:24:52,231 INFO L226 Difference]: Without dead ends: 45 [2020-11-28 07:24:52,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:24:52,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-28 07:24:52,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 21. [2020-11-28 07:24:52,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 07:24:52,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-11-28 07:24:52,236 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 4 [2020-11-28 07:24:52,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:52,237 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-11-28 07:24:52,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:24:52,237 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-11-28 07:24:52,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:24:52,240 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:52,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:24:52,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:24:52,240 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:52,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:52,241 INFO L82 PathProgramCache]: Analyzing trace with hash 3080752, now seen corresponding path program 1 times [2020-11-28 07:24:52,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:52,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498432881] [2020-11-28 07:24:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:52,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498432881] [2020-11-28 07:24:52,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:52,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:24:52,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370113409] [2020-11-28 07:24:52,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:24:52,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:52,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:24:52,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:24:52,301 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 3 states. [2020-11-28 07:24:52,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:52,335 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-11-28 07:24:52,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:24:52,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:24:52,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:52,336 INFO L225 Difference]: With dead ends: 19 [2020-11-28 07:24:52,336 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 07:24:52,337 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 [2020-11-28 07:24:52,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 07:24:52,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-28 07:24:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 07:24:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-11-28 07:24:52,348 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2020-11-28 07:24:52,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:52,349 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-11-28 07:24:52,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:24:52,349 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-11-28 07:24:52,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:24:52,349 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:52,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:24:52,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:24:52,350 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:52,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:52,351 INFO L82 PathProgramCache]: Analyzing trace with hash 3080753, now seen corresponding path program 1 times [2020-11-28 07:24:52,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:52,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174681587] [2020-11-28 07:24:52,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:52,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174681587] [2020-11-28 07:24:52,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:52,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:24:52,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469884427] [2020-11-28 07:24:52,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:24:52,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:52,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:24:52,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:24:52,443 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 3 states. [2020-11-28 07:24:52,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:52,474 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-11-28 07:24:52,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:24:52,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:24:52,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:52,476 INFO L225 Difference]: With dead ends: 20 [2020-11-28 07:24:52,476 INFO L226 Difference]: Without dead ends: 20 [2020-11-28 07:24:52,477 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 [2020-11-28 07:24:52,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-28 07:24:52,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-28 07:24:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 07:24:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-28 07:24:52,480 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-11-28 07:24:52,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:52,480 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-28 07:24:52,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:24:52,480 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-28 07:24:52,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:24:52,481 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:52,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:24:52,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:24:52,481 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:52,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:52,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1585672413, now seen corresponding path program 1 times [2020-11-28 07:24:52,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:52,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117783409] [2020-11-28 07:24:52,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:52,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117783409] [2020-11-28 07:24:52,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78090997] [2020-11-28 07:24:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/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 [2020-11-28 07:24:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:52,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:24:52,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:24:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:52,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:24:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:52,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1548697794] [2020-11-28 07:24:52,701 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:24:52,703 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:24:52,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:24:52,713 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:24:52,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:24:53,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:53,280 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:53,587 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:24:54,203 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 70 [2020-11-28 07:24:54,887 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 66 [2020-11-28 07:24:55,329 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 64 [2020-11-28 07:24:55,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:24:55,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2020-11-28 07:24:55,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055093466] [2020-11-28 07:24:55,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:24:55,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:55,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:24:55,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:24:55,333 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-11-28 07:24:55,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:55,461 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-11-28 07:24:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:24:55,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-28 07:24:55,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:55,463 INFO L225 Difference]: With dead ends: 25 [2020-11-28 07:24:55,463 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 07:24:55,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:24:55,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 07:24:55,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-11-28 07:24:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 07:24:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-11-28 07:24:55,467 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2020-11-28 07:24:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:55,467 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-11-28 07:24:55,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:24:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-11-28 07:24:55,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:24:55,468 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:55,468 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 07:24:55,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:24:55,678 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:55,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:55,678 INFO L82 PathProgramCache]: Analyzing trace with hash 596146973, now seen corresponding path program 1 times [2020-11-28 07:24:55,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:55,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173235122] [2020-11-28 07:24:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:55,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173235122] [2020-11-28 07:24:55,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659109994] [2020-11-28 07:24:55,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/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 [2020-11-28 07:24:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:55,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:24:55,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:24:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:55,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:24:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:56,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [342171086] [2020-11-28 07:24:56,017 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:24:56,017 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:24:56,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:24:56,018 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:24:56,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:24:56,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:56,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:56,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:57,023 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:24:57,201 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-28 07:24:57,799 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-28 07:24:57,982 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-11-28 07:24:58,207 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:24:58,388 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-11-28 07:24:58,561 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-28 07:24:58,563 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:24:58,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:24:58,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2020-11-28 07:24:58,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538322578] [2020-11-28 07:24:58,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 07:24:58,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:58,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 07:24:58,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-11-28 07:24:58,565 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 10 states. [2020-11-28 07:24:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:58,927 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-11-28 07:24:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 07:24:58,928 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2020-11-28 07:24:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:58,929 INFO L225 Difference]: With dead ends: 64 [2020-11-28 07:24:58,930 INFO L226 Difference]: Without dead ends: 64 [2020-11-28 07:24:58,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2020-11-28 07:24:58,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-28 07:24:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 33. [2020-11-28 07:24:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-28 07:24:58,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-11-28 07:24:58,936 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 10 [2020-11-28 07:24:58,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:58,936 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-11-28 07:24:58,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 07:24:58,936 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-11-28 07:24:58,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:24:58,937 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:58,937 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 07:24:59,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:24:59,150 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:59,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:59,150 INFO L82 PathProgramCache]: Analyzing trace with hash 596149066, now seen corresponding path program 1 times [2020-11-28 07:24:59,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:59,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735241438] [2020-11-28 07:24:59,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:24:59,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735241438] [2020-11-28 07:24:59,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555778708] [2020-11-28 07:24:59,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/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 [2020-11-28 07:24:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:59,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 07:24:59,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:24:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:24:59,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:24:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:24:59,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [457920262] [2020-11-28 07:24:59,506 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:24:59,506 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:24:59,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:24:59,506 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:24:59,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:24:59,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:59,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:59,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:00,416 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:25:00,630 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-11-28 07:25:01,140 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-28 07:25:01,290 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-11-28 07:25:01,437 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:25:01,617 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-11-28 07:25:01,786 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-28 07:25:01,787 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:25:01,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:25:01,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 2] total 7 [2020-11-28 07:25:01,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325891717] [2020-11-28 07:25:01,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 07:25:01,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:01,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 07:25:01,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-28 07:25:01,789 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 9 states. [2020-11-28 07:25:01,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:01,938 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2020-11-28 07:25:01,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:25:01,940 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2020-11-28 07:25:01,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:01,941 INFO L225 Difference]: With dead ends: 61 [2020-11-28 07:25:01,941 INFO L226 Difference]: Without dead ends: 61 [2020-11-28 07:25:01,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-11-28 07:25:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-28 07:25:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-11-28 07:25:01,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 07:25:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2020-11-28 07:25:01,947 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 10 [2020-11-28 07:25:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:01,947 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2020-11-28 07:25:01,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 07:25:01,948 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2020-11-28 07:25:01,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 07:25:01,948 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:01,948 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:25:02,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:25:02,149 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:25:02,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:02,150 INFO L82 PathProgramCache]: Analyzing trace with hash 188329252, now seen corresponding path program 1 times [2020-11-28 07:25:02,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:02,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311796490] [2020-11-28 07:25:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:25:02,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311796490] [2020-11-28 07:25:02,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290581841] [2020-11-28 07:25:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/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 [2020-11-28 07:25:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:02,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 07:25:02,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:25:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:25:02,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:25:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:25:02,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1178795791] [2020-11-28 07:25:02,380 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-28 07:25:02,380 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:25:02,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:25:02,381 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:25:02,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:25:02,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:02,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:02,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:03,193 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:25:03,586 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-28 07:25:03,838 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:25:04,039 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-11-28 07:25:04,164 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-28 07:25:04,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:25:04,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 4, 4] total 16 [2020-11-28 07:25:04,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064648029] [2020-11-28 07:25:04,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:25:04,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:04,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:25:04,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:25:04,253 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand 8 states. [2020-11-28 07:25:04,600 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2020-11-28 07:25:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:04,715 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2020-11-28 07:25:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:25:04,716 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-11-28 07:25:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:04,717 INFO L225 Difference]: With dead ends: 54 [2020-11-28 07:25:04,717 INFO L226 Difference]: Without dead ends: 54 [2020-11-28 07:25:04,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-11-28 07:25:04,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-28 07:25:04,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-28 07:25:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 07:25:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-11-28 07:25:04,726 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 13 [2020-11-28 07:25:04,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:04,727 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-11-28 07:25:04,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:25:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2020-11-28 07:25:04,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 07:25:04,728 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:04,728 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2020-11-28 07:25:04,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-11-28 07:25:04,935 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:25:04,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:04,935 INFO L82 PathProgramCache]: Analyzing trace with hash 188258073, now seen corresponding path program 2 times [2020-11-28 07:25:04,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:04,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414101892] [2020-11-28 07:25:04,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 07:25:04,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414101892] [2020-11-28 07:25:04,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:04,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:25:04,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657247659] [2020-11-28 07:25:04,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:25:04,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:04,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:25:04,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:25:04,973 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand 3 states. [2020-11-28 07:25:04,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:04,993 INFO L93 Difference]: Finished difference Result 81 states and 110 transitions. [2020-11-28 07:25:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:25:04,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-11-28 07:25:04,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:04,994 INFO L225 Difference]: With dead ends: 81 [2020-11-28 07:25:04,994 INFO L226 Difference]: Without dead ends: 81 [2020-11-28 07:25:04,995 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 [2020-11-28 07:25:04,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-28 07:25:04,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2020-11-28 07:25:04,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-28 07:25:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2020-11-28 07:25:05,000 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 13 [2020-11-28 07:25:05,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:05,000 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2020-11-28 07:25:05,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:25:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2020-11-28 07:25:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 07:25:05,002 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:05,002 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2020-11-28 07:25:05,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2020-11-28 07:25:05,003 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:25:05,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:05,003 INFO L82 PathProgramCache]: Analyzing trace with hash 521636203, now seen corresponding path program 3 times [2020-11-28 07:25:05,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:05,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326451359] [2020-11-28 07:25:05,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:25:05,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326451359] [2020-11-28 07:25:05,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698484294] [2020-11-28 07:25:05,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/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 [2020-11-28 07:25:05,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 07:25:05,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:25:05,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:25:05,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:25:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:25:05,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:25:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:25:05,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1166805857] [2020-11-28 07:25:05,256 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:25:05,256 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:25:05,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:25:05,257 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:25:05,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:25:05,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:05,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:05,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:05,997 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:25:06,125 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-28 07:25:06,469 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-28 07:25:06,714 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:25:06,952 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-28 07:25:06,953 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:25:06,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:25:06,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2020-11-28 07:25:06,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166081334] [2020-11-28 07:25:06,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 07:25:06,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:06,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 07:25:06,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-28 07:25:06,954 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand 9 states. [2020-11-28 07:25:07,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:07,083 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-11-28 07:25:07,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:25:07,084 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-11-28 07:25:07,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:07,084 INFO L225 Difference]: With dead ends: 52 [2020-11-28 07:25:07,085 INFO L226 Difference]: Without dead ends: 52 [2020-11-28 07:25:07,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-11-28 07:25:07,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-28 07:25:07,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-11-28 07:25:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 07:25:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2020-11-28 07:25:07,089 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 13 [2020-11-28 07:25:07,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:07,089 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2020-11-28 07:25:07,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 07:25:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2020-11-28 07:25:07,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 07:25:07,090 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:07,090 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2020-11-28 07:25:07,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:25:07,301 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:25:07,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:07,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1541033020, now seen corresponding path program 1 times [2020-11-28 07:25:07,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:07,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659350030] [2020-11-28 07:25:07,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:25:07,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659350030] [2020-11-28 07:25:07,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473169946] [2020-11-28 07:25:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/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 [2020-11-28 07:25:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:07,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 07:25:07,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:25:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 07:25:07,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:25:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 07:25:07,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [223763858] [2020-11-28 07:25:07,455 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:25:07,455 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:25:07,456 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:25:07,456 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:25:07,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:25:07,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:07,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:07,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:08,184 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:25:08,326 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-11-28 07:25:08,668 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-28 07:25:08,922 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:25:09,161 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-28 07:25:09,161 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:25:09,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:25:09,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 2, 2] total 4 [2020-11-28 07:25:09,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94202019] [2020-11-28 07:25:09,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:25:09,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:09,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:25:09,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:25:09,163 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand 5 states. [2020-11-28 07:25:09,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:09,196 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2020-11-28 07:25:09,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:25:09,196 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-28 07:25:09,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:09,197 INFO L225 Difference]: With dead ends: 44 [2020-11-28 07:25:09,197 INFO L226 Difference]: Without dead ends: 44 [2020-11-28 07:25:09,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-28 07:25:09,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-28 07:25:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-28 07:25:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-28 07:25:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-11-28 07:25:09,201 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 14 [2020-11-28 07:25:09,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:09,201 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-11-28 07:25:09,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:25:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-11-28 07:25:09,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 07:25:09,202 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:09,202 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2020-11-28 07:25:09,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-11-28 07:25:09,405 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:25:09,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:09,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1541033021, now seen corresponding path program 1 times [2020-11-28 07:25:09,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:09,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140578895] [2020-11-28 07:25:09,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 07:25:09,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140578895] [2020-11-28 07:25:09,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674062776] [2020-11-28 07:25:09,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/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 [2020-11-28 07:25:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:09,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-28 07:25:09,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:25:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 07:25:09,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:25:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 07:25:09,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1277673189] [2020-11-28 07:25:09,660 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:25:09,661 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:25:09,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:25:09,661 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:25:09,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:25:09,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:09,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:09,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:10,291 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:25:10,480 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-11-28 07:25:10,851 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-28 07:25:11,087 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:25:11,216 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-11-28 07:25:11,336 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-28 07:25:11,336 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:25:11,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:25:11,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-11-28 07:25:11,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33453689] [2020-11-28 07:25:11,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:25:11,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:11,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:25:11,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-11-28 07:25:11,338 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-11-28 07:25:11,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:11,438 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2020-11-28 07:25:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:25:11,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-28 07:25:11,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:11,439 INFO L225 Difference]: With dead ends: 73 [2020-11-28 07:25:11,440 INFO L226 Difference]: Without dead ends: 73 [2020-11-28 07:25:11,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:25:11,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-28 07:25:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2020-11-28 07:25:11,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-28 07:25:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2020-11-28 07:25:11,444 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 14 [2020-11-28 07:25:11,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:11,445 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2020-11-28 07:25:11,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:25:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2020-11-28 07:25:11,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 07:25:11,445 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:11,445 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:25:11,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:25:11,657 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:25:11,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:11,658 INFO L82 PathProgramCache]: Analyzing trace with hash 595785087, now seen corresponding path program 1 times [2020-11-28 07:25:11,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:11,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53500072] [2020-11-28 07:25:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:25:11,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53500072] [2020-11-28 07:25:11,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598173735] [2020-11-28 07:25:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:25:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:11,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 07:25:11,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:25:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:25:11,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:25:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:25:11,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [663326288] [2020-11-28 07:25:11,818 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-11-28 07:25:11,818 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:25:11,818 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:25:11,818 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:25:11,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:25:11,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:11,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:12,002 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:12,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:12,504 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:25:12,867 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-28 07:25:13,118 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:25:13,236 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-11-28 07:25:13,358 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-28 07:25:13,568 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:25:13,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:25:13,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2020-11-28 07:25:13,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593467660] [2020-11-28 07:25:13,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 07:25:13,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:13,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 07:25:13,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-11-28 07:25:13,570 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand 9 states. [2020-11-28 07:25:13,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:13,703 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2020-11-28 07:25:13,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:25:13,703 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-11-28 07:25:13,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:13,704 INFO L225 Difference]: With dead ends: 103 [2020-11-28 07:25:13,704 INFO L226 Difference]: Without dead ends: 103 [2020-11-28 07:25:13,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-11-28 07:25:13,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-28 07:25:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-11-28 07:25:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-28 07:25:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 110 transitions. [2020-11-28 07:25:13,711 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 110 transitions. Word has length 15 [2020-11-28 07:25:13,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:13,711 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 110 transitions. [2020-11-28 07:25:13,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 07:25:13,711 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 110 transitions. [2020-11-28 07:25:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:25:13,712 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:13,712 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1] [2020-11-28 07:25:13,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2020-11-28 07:25:13,913 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:25:13,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:13,913 INFO L82 PathProgramCache]: Analyzing trace with hash -830929546, now seen corresponding path program 4 times [2020-11-28 07:25:13,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:13,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825835229] [2020-11-28 07:25:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 07:25:13,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825835229] [2020-11-28 07:25:13,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526175862] [2020-11-28 07:25:13,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:25:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:14,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 07:25:14,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:25:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 07:25:14,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:25:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 07:25:14,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294024756] [2020-11-28 07:25:14,050 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:25:14,050 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:25:14,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:25:14,051 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:25:14,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:25:14,107 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:14,213 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:14,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:14,677 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:25:14,785 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-28 07:25:15,229 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-28 07:25:15,478 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:25:15,712 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-28 07:25:15,713 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:25:15,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:25:15,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-11-28 07:25:15,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052299901] [2020-11-28 07:25:15,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:25:15,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:15,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:25:15,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-11-28 07:25:15,714 INFO L87 Difference]: Start difference. First operand 80 states and 110 transitions. Second operand 6 states. [2020-11-28 07:25:15,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:15,766 INFO L93 Difference]: Finished difference Result 194 states and 267 transitions. [2020-11-28 07:25:15,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:25:15,770 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-28 07:25:15,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:15,772 INFO L225 Difference]: With dead ends: 194 [2020-11-28 07:25:15,772 INFO L226 Difference]: Without dead ends: 194 [2020-11-28 07:25:15,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:25:15,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-11-28 07:25:15,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 100. [2020-11-28 07:25:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-28 07:25:15,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 138 transitions. [2020-11-28 07:25:15,787 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 138 transitions. Word has length 16 [2020-11-28 07:25:15,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:15,788 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 138 transitions. [2020-11-28 07:25:15,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:25:15,788 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 138 transitions. [2020-11-28 07:25:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 07:25:15,789 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:15,789 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1] [2020-11-28 07:25:16,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:25:16,002 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:25:16,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:16,003 INFO L82 PathProgramCache]: Analyzing trace with hash 924819805, now seen corresponding path program 2 times [2020-11-28 07:25:16,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:16,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301976007] [2020-11-28 07:25:16,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-28 07:25:16,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301976007] [2020-11-28 07:25:16,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674071776] [2020-11-28 07:25:16,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:25:16,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-28 07:25:16,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:25:16,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-28 07:25:16,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:25:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-28 07:25:16,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:25:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-28 07:25:16,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [329753703] [2020-11-28 07:25:16,311 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:25:16,311 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:25:16,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:25:16,311 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:25:16,312 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:25:16,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:16,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:16,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:16,965 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:25:17,263 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-11-28 07:25:17,659 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-28 07:25:17,919 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:25:18,166 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-28 07:25:18,167 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:25:18,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:25:18,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2020-11-28 07:25:18,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785637646] [2020-11-28 07:25:18,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 07:25:18,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:18,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 07:25:18,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-11-28 07:25:18,169 INFO L87 Difference]: Start difference. First operand 100 states and 138 transitions. Second operand 12 states. [2020-11-28 07:25:18,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:18,261 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2020-11-28 07:25:18,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:25:18,261 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-11-28 07:25:18,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:18,262 INFO L225 Difference]: With dead ends: 98 [2020-11-28 07:25:18,263 INFO L226 Difference]: Without dead ends: 98 [2020-11-28 07:25:18,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-11-28 07:25:18,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-28 07:25:18,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 58. [2020-11-28 07:25:18,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-28 07:25:18,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2020-11-28 07:25:18,267 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 20 [2020-11-28 07:25:18,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:18,267 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2020-11-28 07:25:18,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 07:25:18,267 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2020-11-28 07:25:18,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 07:25:18,269 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:18,269 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1] [2020-11-28 07:25:18,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:25:18,477 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:25:18,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:18,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1432583701, now seen corresponding path program 2 times [2020-11-28 07:25:18,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:18,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393475896] [2020-11-28 07:25:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 39 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-28 07:25:18,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393475896] [2020-11-28 07:25:18,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572545457] [2020-11-28 07:25:18,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:25:18,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 07:25:18,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:25:18,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 07:25:18,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:25:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-28 07:25:18,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:25:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-28 07:25:18,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [435469639] [2020-11-28 07:25:18,860 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:25:18,860 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:25:18,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:25:18,860 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:25:18,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:25:18,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:19,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:19,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:19,475 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:25:19,681 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-11-28 07:25:20,052 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-28 07:25:20,314 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:25:20,441 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-11-28 07:25:20,573 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-28 07:25:20,574 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:25:20,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:25:20,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2020-11-28 07:25:20,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615564954] [2020-11-28 07:25:20,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 07:25:20,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:20,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 07:25:20,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-11-28 07:25:20,576 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 13 states. [2020-11-28 07:25:21,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:21,024 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-11-28 07:25:21,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 07:25:21,024 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-11-28 07:25:21,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:21,024 INFO L225 Difference]: With dead ends: 74 [2020-11-28 07:25:21,025 INFO L226 Difference]: Without dead ends: 74 [2020-11-28 07:25:21,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2020-11-28 07:25:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-28 07:25:21,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2020-11-28 07:25:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-28 07:25:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2020-11-28 07:25:21,029 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 28 [2020-11-28 07:25:21,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:21,029 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2020-11-28 07:25:21,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 07:25:21,029 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2020-11-28 07:25:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-28 07:25:21,030 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:21,030 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-11-28 07:25:21,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2020-11-28 07:25:21,241 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:25:21,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:21,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1496073855, now seen corresponding path program 2 times [2020-11-28 07:25:21,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:21,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316712412] [2020-11-28 07:25:21,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 149 proven. 27 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-28 07:25:21,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316712412] [2020-11-28 07:25:21,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514263585] [2020-11-28 07:25:21,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:25:21,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-28 07:25:21,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:25:21,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:25:21,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:25:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-11-28 07:25:21,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:25:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-11-28 07:25:21,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:25:21,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [9] total 13 [2020-11-28 07:25:21,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784756200] [2020-11-28 07:25:21,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:25:21,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:21,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:25:21,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:25:21,535 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 6 states. [2020-11-28 07:25:21,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:21,569 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2020-11-28 07:25:21,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:25:21,570 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-11-28 07:25:21,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:21,570 INFO L225 Difference]: With dead ends: 67 [2020-11-28 07:25:21,570 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:25:21,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:25:21,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:25:21,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:25:21,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:25:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:25:21,571 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2020-11-28 07:25:21,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:21,572 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:25:21,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:25:21,572 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:25:21,572 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:25:21,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:25:21,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:25:21 BoogieIcfgContainer [2020-11-28 07:25:21,776 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:25:21,777 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:25:21,777 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:25:21,777 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:25:21,778 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:51" (3/4) ... [2020-11-28 07:25:21,783 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:25:21,796 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-28 07:25:21,797 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-28 07:25:21,797 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:25:21,828 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f281b0e1-7a5b-407a-9877-40626df74843/bin/utaipan/witness.graphml [2020-11-28 07:25:21,828 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:25:21,829 INFO L168 Benchmark]: Toolchain (without parser) took 31016.30 ms. Allocated memory was 79.7 MB in the beginning and 224.4 MB in the end (delta: 144.7 MB). Free memory was 48.5 MB in the beginning and 165.5 MB in the end (delta: -117.0 MB). Peak memory consumption was 27.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:21,830 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 79.7 MB. Free memory was 49.8 MB in the beginning and 49.8 MB in the end (delta: 23.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:25:21,830 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.76 ms. Allocated memory was 79.7 MB in the beginning and 104.9 MB in the end (delta: 25.2 MB). Free memory was 48.3 MB in the beginning and 80.3 MB in the end (delta: -32.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:21,830 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.31 ms. Allocated memory is still 104.9 MB. Free memory was 80.3 MB in the beginning and 79.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:21,831 INFO L168 Benchmark]: Boogie Preprocessor took 23.48 ms. Allocated memory is still 104.9 MB. Free memory was 79.0 MB in the beginning and 77.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:25:21,831 INFO L168 Benchmark]: RCFGBuilder took 506.55 ms. Allocated memory is still 104.9 MB. Free memory was 77.8 MB in the beginning and 56.4 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:21,831 INFO L168 Benchmark]: TraceAbstraction took 30166.79 ms. Allocated memory was 104.9 MB in the beginning and 224.4 MB in the end (delta: 119.5 MB). Free memory was 56.0 MB in the beginning and 168.7 MB in the end (delta: -112.7 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:21,832 INFO L168 Benchmark]: Witness Printer took 51.64 ms. Allocated memory is still 224.4 MB. Free memory was 168.7 MB in the beginning and 165.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:21,834 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 79.7 MB. Free memory was 49.8 MB in the beginning and 49.8 MB in the end (delta: 23.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 224.76 ms. Allocated memory was 79.7 MB in the beginning and 104.9 MB in the end (delta: 25.2 MB). Free memory was 48.3 MB in the beginning and 80.3 MB in the end (delta: -32.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.31 ms. Allocated memory is still 104.9 MB. Free memory was 80.3 MB in the beginning and 79.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.48 ms. Allocated memory is still 104.9 MB. Free memory was 79.0 MB in the beginning and 77.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 506.55 ms. Allocated memory is still 104.9 MB. Free memory was 77.8 MB in the beginning and 56.4 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 30166.79 ms. Allocated memory was 104.9 MB in the beginning and 224.4 MB in the end (delta: 119.5 MB). Free memory was 56.0 MB in the beginning and 168.7 MB in the end (delta: -112.7 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Witness Printer took 51.64 ms. Allocated memory is still 224.4 MB. Free memory was 168.7 MB in the beginning and 165.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 30.0s, OverallIterations: 17, TraceHistogramMax: 9, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 182 SDtfs, 646 SDslu, 253 SDs, 0 SdLazy, 764 SolverSat, 139 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 654 GetRequests, 458 SyntacticMatches, 6 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 15.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 286 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 451 NumberOfCodeBlocks, 373 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 621 ConstructedInterpolants, 11 QuantifiedInterpolants, 145677 SizeOfPredicates, 51 NumberOfNonLiveVariables, 1142 ConjunctsInSsa, 124 ConjunctsInUnsatCore, 41 InterpolantComputations, 7 PerfectInterpolantSequences, 939/1181 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]: 1699, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 18, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 44, TOOLS_POST_TIME[ms]: 717, 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: 44, TOOLS_QUANTIFIERELIM_TIME[ms]: 692, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 97, FLUID_QUERY_TIME[ms]: 5, FLUID_QUERIES: 77, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 8, DOMAIN_JOIN_TIME[ms]: 501, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 4, DOMAIN_WIDEN_TIME[ms]: 355, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME[ms]: 27, DOMAIN_ISBOTTOM_APPLICATIONS: 18, DOMAIN_ISBOTTOM_TIME[ms]: 41, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 1031, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 1030, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, 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]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 12, DAG_COMPRESSION_PROCESSED_NODES: 139, DAG_COMPRESSION_RETAINED_NODES: 54, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...