./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c -s /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/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 56b28f59847d63942ec468b0c95f39e5b8c0763a .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 06:38:30,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 06:38:30,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 06:38:30,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 06:38:30,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 06:38:30,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 06:38:30,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 06:38:30,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 06:38:30,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 06:38:30,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 06:38:30,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 06:38:30,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 06:38:30,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 06:38:30,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 06:38:30,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 06:38:30,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 06:38:30,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 06:38:30,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 06:38:30,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 06:38:30,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 06:38:30,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 06:38:30,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 06:38:30,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 06:38:30,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 06:38:30,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 06:38:30,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 06:38:30,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 06:38:30,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 06:38:30,577 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 06:38:30,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 06:38:30,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 06:38:30,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 06:38:30,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 06:38:30,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 06:38:30,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 06:38:30,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 06:38:30,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 06:38:30,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 06:38:30,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 06:38:30,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 06:38:30,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 06:38:30,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 06:38:30,607 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 06:38:30,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 06:38:30,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 06:38:30,609 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 06:38:30,609 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 06:38:30,609 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 06:38:30,609 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 06:38:30,609 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 06:38:30,609 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 06:38:30,610 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 06:38:30,610 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 06:38:30,610 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 06:38:30,610 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 06:38:30,610 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 06:38:30,610 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 06:38:30,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 06:38:30,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 06:38:30,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 06:38:30,612 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 06:38:30,612 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 06:38:30,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 06:38:30,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 06:38:30,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 06:38:30,612 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 06:38:30,613 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 06:38:30,613 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 06:38:30,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 06:38:30,613 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 06:38:30,613 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 06:38:30,613 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 06:38:30,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 06:38:30,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 06:38:30,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:38:30,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 06:38:30,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 06:38:30,615 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 06:38:30,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 06:38:30,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 06:38:30,615 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 06:38:30,615 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_700298b3-7681-4580-a624-a8f9b939faf7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56b28f59847d63942ec468b0c95f39e5b8c0763a [2020-12-09 06:38:30,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 06:38:30,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 06:38:30,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 06:38:30,812 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 06:38:30,813 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 06:38:30,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2020-12-09 06:38:30,855 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/data/1ebfa947a/ab03f701888a44d2a7e75555a7ee8884/FLAGe4e90407e [2020-12-09 06:38:31,232 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 06:38:31,232 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2020-12-09 06:38:31,238 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/data/1ebfa947a/ab03f701888a44d2a7e75555a7ee8884/FLAGe4e90407e [2020-12-09 06:38:31,247 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/data/1ebfa947a/ab03f701888a44d2a7e75555a7ee8884 [2020-12-09 06:38:31,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 06:38:31,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 06:38:31,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 06:38:31,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 06:38:31,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 06:38:31,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:38:31" (1/1) ... [2020-12-09 06:38:31,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ab0130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:31, skipping insertion in model container [2020-12-09 06:38:31,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:38:31" (1/1) ... [2020-12-09 06:38:31,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 06:38:31,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 06:38:31,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:38:31,401 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 06:38:31,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:38:31,421 INFO L208 MainTranslator]: Completed translation [2020-12-09 06:38:31,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:31 WrapperNode [2020-12-09 06:38:31,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 06:38:31,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 06:38:31,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 06:38:31,423 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 06:38:31,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:31" (1/1) ... [2020-12-09 06:38:31,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:31" (1/1) ... [2020-12-09 06:38:31,449 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 06:38:31,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 06:38:31,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 06:38:31,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 06:38:31,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:31" (1/1) ... [2020-12-09 06:38:31,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:31" (1/1) ... [2020-12-09 06:38:31,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:31" (1/1) ... [2020-12-09 06:38:31,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:31" (1/1) ... [2020-12-09 06:38:31,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:31" (1/1) ... [2020-12-09 06:38:31,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:31" (1/1) ... [2020-12-09 06:38:31,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:31" (1/1) ... [2020-12-09 06:38:31,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 06:38:31,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 06:38:31,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 06:38:31,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 06:38:31,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:38:31,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 06:38:31,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 06:38:31,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 06:38:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 06:38:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 06:38:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 06:38:31,770 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 06:38:31,770 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 06:38:31,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:38:31 BoogieIcfgContainer [2020-12-09 06:38:31,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 06:38:31,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 06:38:31,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 06:38:31,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 06:38:31,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:38:31" (1/3) ... [2020-12-09 06:38:31,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20eea6a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:38:31, skipping insertion in model container [2020-12-09 06:38:31,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:31" (2/3) ... [2020-12-09 06:38:31,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20eea6a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:38:31, skipping insertion in model container [2020-12-09 06:38:31,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:38:31" (3/3) ... [2020-12-09 06:38:31,781 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration.c [2020-12-09 06:38:31,794 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 06:38:31,797 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-09 06:38:31,807 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-09 06:38:31,826 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 06:38:31,826 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 06:38:31,826 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 06:38:31,826 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 06:38:31,826 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 06:38:31,827 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 06:38:31,827 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 06:38:31,827 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 06:38:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-09 06:38:31,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 06:38:31,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:31,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 06:38:31,847 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]=== [2020-12-09 06:38:31,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:31,852 INFO L82 PathProgramCache]: Analyzing trace with hash 3150815, now seen corresponding path program 1 times [2020-12-09 06:38:31,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:31,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329659970] [2020-12-09 06:38:31,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:38:31,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329659970] [2020-12-09 06:38:31,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:38:31,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:38:31,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349754343] [2020-12-09 06:38:31,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 06:38:31,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:32,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 06:38:32,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 06:38:32,011 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-12-09 06:38:32,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:32,054 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-12-09 06:38:32,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 06:38:32,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 06:38:32,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:32,063 INFO L225 Difference]: With dead ends: 37 [2020-12-09 06:38:32,064 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 06:38:32,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 06:38:32,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 06:38:32,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2020-12-09 06:38:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 06:38:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-09 06:38:32,095 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-12-09 06:38:32,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:32,095 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-09 06:38:32,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 06:38:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-09 06:38:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 06:38:32,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:32,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 06:38:32,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 06:38:32,096 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]=== [2020-12-09 06:38:32,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:32,097 INFO L82 PathProgramCache]: Analyzing trace with hash 3078660, now seen corresponding path program 1 times [2020-12-09 06:38:32,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:32,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072952429] [2020-12-09 06:38:32,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:38:32,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072952429] [2020-12-09 06:38:32,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:38:32,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:38:32,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86379470] [2020-12-09 06:38:32,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 06:38:32,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:32,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 06:38:32,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 06:38:32,130 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-12-09 06:38:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:32,148 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-12-09 06:38:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 06:38:32,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 06:38:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:32,149 INFO L225 Difference]: With dead ends: 37 [2020-12-09 06:38:32,150 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 06:38:32,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 06:38:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 06:38:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2020-12-09 06:38:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 06:38:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-09 06:38:32,155 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2020-12-09 06:38:32,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:32,155 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-09 06:38:32,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 06:38:32,155 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-09 06:38:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 06:38:32,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:32,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 06:38:32,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 06:38:32,156 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]=== [2020-12-09 06:38:32,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:32,157 INFO L82 PathProgramCache]: Analyzing trace with hash 3080752, now seen corresponding path program 1 times [2020-12-09 06:38:32,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:32,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432302686] [2020-12-09 06:38:32,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:38:32,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432302686] [2020-12-09 06:38:32,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:38:32,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 06:38:32,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427172361] [2020-12-09 06:38:32,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:38:32,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:32,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:38:32,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:38:32,207 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2020-12-09 06:38:32,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:32,258 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-12-09 06:38:32,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 06:38:32,259 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 06:38:32,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:32,260 INFO L225 Difference]: With dead ends: 42 [2020-12-09 06:38:32,260 INFO L226 Difference]: Without dead ends: 42 [2020-12-09 06:38:32,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:38:32,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-09 06:38:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2020-12-09 06:38:32,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 06:38:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-09 06:38:32,265 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 4 [2020-12-09 06:38:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:32,265 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-09 06:38:32,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:38:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-09 06:38:32,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 06:38:32,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:32,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 06:38:32,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 06:38:32,266 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]=== [2020-12-09 06:38:32,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:32,267 INFO L82 PathProgramCache]: Analyzing trace with hash 95438513, now seen corresponding path program 1 times [2020-12-09 06:38:32,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:32,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957806260] [2020-12-09 06:38:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:38:32,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957806260] [2020-12-09 06:38:32,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:38:32,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:38:32,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222069175] [2020-12-09 06:38:32,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:38:32,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:32,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:38:32,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:38:32,297 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-12-09 06:38:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:32,319 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-09 06:38:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 06:38:32,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 06:38:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:32,320 INFO L225 Difference]: With dead ends: 22 [2020-12-09 06:38:32,320 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 06:38:32,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:38:32,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 06:38:32,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-09 06:38:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 06:38:32,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-09 06:38:32,323 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 5 [2020-12-09 06:38:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:32,323 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-09 06:38:32,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:38:32,323 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-09 06:38:32,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 06:38:32,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:32,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 06:38:32,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 06:38:32,324 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]=== [2020-12-09 06:38:32,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:32,324 INFO L82 PathProgramCache]: Analyzing trace with hash 95438514, now seen corresponding path program 1 times [2020-12-09 06:38:32,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:32,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608051117] [2020-12-09 06:38:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:38:32,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608051117] [2020-12-09 06:38:32,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:38:32,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:38:32,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034261369] [2020-12-09 06:38:32,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:38:32,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:32,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:38:32,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:38:32,356 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2020-12-09 06:38:32,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:32,398 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-12-09 06:38:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 06:38:32,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 06:38:32,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:32,399 INFO L225 Difference]: With dead ends: 35 [2020-12-09 06:38:32,399 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 06:38:32,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:38:32,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 06:38:32,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2020-12-09 06:38:32,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 06:38:32,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-09 06:38:32,402 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 5 [2020-12-09 06:38:32,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:32,402 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-09 06:38:32,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:38:32,402 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-09 06:38:32,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 06:38:32,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:32,403 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-12-09 06:38:32,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 06:38:32,403 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]=== [2020-12-09 06:38:32,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:32,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1522149287, now seen corresponding path program 1 times [2020-12-09 06:38:32,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:32,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982067112] [2020-12-09 06:38:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:38:32,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982067112] [2020-12-09 06:38:32,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138508564] [2020-12-09 06:38:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:38:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:32,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 06:38:32,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:38:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:38:32,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:38:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:38:32,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 06:38:32,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2020-12-09 06:38:32,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369235906] [2020-12-09 06:38:32,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 06:38:32,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:32,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 06:38:32,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-09 06:38:32,562 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-12-09 06:38:32,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:32,635 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-12-09 06:38:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 06:38:32,635 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2020-12-09 06:38:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:32,636 INFO L225 Difference]: With dead ends: 50 [2020-12-09 06:38:32,636 INFO L226 Difference]: Without dead ends: 50 [2020-12-09 06:38:32,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-09 06:38:32,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-09 06:38:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 26. [2020-12-09 06:38:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 06:38:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-12-09 06:38:32,640 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 7 [2020-12-09 06:38:32,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:32,640 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-12-09 06:38:32,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 06:38:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-12-09 06:38:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 06:38:32,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:32,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:38:32,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-09 06:38:32,843 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]=== [2020-12-09 06:38:32,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:32,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1522151379, now seen corresponding path program 1 times [2020-12-09 06:38:32,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:32,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004163200] [2020-12-09 06:38:32,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:38:33,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004163200] [2020-12-09 06:38:33,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:38:33,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 06:38:33,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588122995] [2020-12-09 06:38:33,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 06:38:33,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:33,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 06:38:33,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:38:33,004 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-12-09 06:38:33,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:33,029 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-12-09 06:38:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 06:38:33,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-09 06:38:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:33,030 INFO L225 Difference]: With dead ends: 24 [2020-12-09 06:38:33,030 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 06:38:33,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:38:33,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 06:38:33,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-09 06:38:33,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 06:38:33,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-09 06:38:33,034 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2020-12-09 06:38:33,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:33,034 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-09 06:38:33,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 06:38:33,034 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-09 06:38:33,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 06:38:33,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:33,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:38:33,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 06:38:33,035 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]=== [2020-12-09 06:38:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:33,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1522151380, now seen corresponding path program 1 times [2020-12-09 06:38:33,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:33,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195103392] [2020-12-09 06:38:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:38:33,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195103392] [2020-12-09 06:38:33,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:38:33,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:38:33,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530487125] [2020-12-09 06:38:33,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:38:33,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:33,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:38:33,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:38:33,086 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-12-09 06:38:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:33,113 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-12-09 06:38:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 06:38:33,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 06:38:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:33,114 INFO L225 Difference]: With dead ends: 25 [2020-12-09 06:38:33,114 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 06:38:33,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:38:33,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 06:38:33,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-09 06:38:33,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 06:38:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-09 06:38:33,116 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2020-12-09 06:38:33,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:33,117 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-09 06:38:33,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:38:33,117 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-09 06:38:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 06:38:33,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:33,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:38:33,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 06:38:33,118 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]=== [2020-12-09 06:38:33,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:33,118 INFO L82 PathProgramCache]: Analyzing trace with hash 148383000, now seen corresponding path program 1 times [2020-12-09 06:38:33,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:33,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136169001] [2020-12-09 06:38:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:38:33,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136169001] [2020-12-09 06:38:33,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49823661] [2020-12-09 06:38:33,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/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 [2020-12-09 06:38:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:33,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 06:38:33,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:38:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:38:33,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:38:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:38:33,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [166169174] [2020-12-09 06:38:33,205 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 06:38:33,206 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:38:33,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:38:33,213 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:38:33,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:38:33,322 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:33,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:33,486 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:33,897 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:38:34,184 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-09 06:38:34,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:38:34,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 12 [2020-12-09 06:38:34,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461605015] [2020-12-09 06:38:34,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 06:38:34,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:34,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 06:38:34,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-12-09 06:38:34,630 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-12-09 06:38:34,870 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2020-12-09 06:38:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:34,935 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-12-09 06:38:34,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 06:38:34,935 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-09 06:38:34,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:34,936 INFO L225 Difference]: With dead ends: 27 [2020-12-09 06:38:34,936 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 06:38:34,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-12-09 06:38:34,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 06:38:34,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-09 06:38:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 06:38:34,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-09 06:38:34,938 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 10 [2020-12-09 06:38:34,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:34,939 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-09 06:38:34,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 06:38:34,939 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-09 06:38:34,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 06:38:34,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:34,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:38:35,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:38:35,141 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]=== [2020-12-09 06:38:35,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:35,142 INFO L82 PathProgramCache]: Analyzing trace with hash 862142579, now seen corresponding path program 1 times [2020-12-09 06:38:35,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:35,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665127426] [2020-12-09 06:38:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:38:35,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665127426] [2020-12-09 06:38:35,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875310129] [2020-12-09 06:38:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/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 [2020-12-09 06:38:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:35,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 06:38:35,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:38:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:38:35,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:38:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:38:35,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1131825731] [2020-12-09 06:38:35,339 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 06:38:35,340 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:38:35,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:38:35,340 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:38:35,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:38:35,398 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:35,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:35,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:35,871 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:38:36,094 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-09 06:38:36,483 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:38:36,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:38:36,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2020-12-09 06:38:36,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493193845] [2020-12-09 06:38:36,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 06:38:36,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:36,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 06:38:36,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-09 06:38:36,484 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 7 states. [2020-12-09 06:38:36,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:36,521 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-12-09 06:38:36,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 06:38:36,522 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-09 06:38:36,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:36,522 INFO L225 Difference]: With dead ends: 67 [2020-12-09 06:38:36,522 INFO L226 Difference]: Without dead ends: 67 [2020-12-09 06:38:36,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-09 06:38:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-09 06:38:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2020-12-09 06:38:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-09 06:38:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2020-12-09 06:38:36,526 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 12 [2020-12-09 06:38:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:36,526 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2020-12-09 06:38:36,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 06:38:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2020-12-09 06:38:36,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 06:38:36,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:36,527 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2020-12-09 06:38:36,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-09 06:38:36,728 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]=== [2020-12-09 06:38:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:36,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1163785730, now seen corresponding path program 1 times [2020-12-09 06:38:36,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:36,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082002315] [2020-12-09 06:38:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 06:38:36,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082002315] [2020-12-09 06:38:36,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663930240] [2020-12-09 06:38:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/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 [2020-12-09 06:38:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:36,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 06:38:36,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:38:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 06:38:36,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:38:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 06:38:36,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1441272327] [2020-12-09 06:38:36,837 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 06:38:36,837 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:38:36,837 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:38:36,838 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:38:36,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:38:36,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:36,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:36,955 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:37,223 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:38:37,504 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-09 06:38:37,761 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:38:37,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:38:37,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-12-09 06:38:37,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540077408] [2020-12-09 06:38:37,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 06:38:37,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:37,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 06:38:37,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-09 06:38:37,763 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand 6 states. [2020-12-09 06:38:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:37,798 INFO L93 Difference]: Finished difference Result 146 states and 202 transitions. [2020-12-09 06:38:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 06:38:37,798 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-09 06:38:37,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:37,800 INFO L225 Difference]: With dead ends: 146 [2020-12-09 06:38:37,800 INFO L226 Difference]: Without dead ends: 146 [2020-12-09 06:38:37,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-12-09 06:38:37,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-09 06:38:37,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 75. [2020-12-09 06:38:37,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-09 06:38:37,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2020-12-09 06:38:37,806 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 13 [2020-12-09 06:38:37,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:37,807 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2020-12-09 06:38:37,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 06:38:37,807 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2020-12-09 06:38:37,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 06:38:37,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:37,807 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2020-12-09 06:38:38,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:38:38,009 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]=== [2020-12-09 06:38:38,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:38,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1163783637, now seen corresponding path program 1 times [2020-12-09 06:38:38,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:38,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247125524] [2020-12-09 06:38:38,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:38:38,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247125524] [2020-12-09 06:38:38,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863508164] [2020-12-09 06:38:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/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 [2020-12-09 06:38:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:38,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 06:38:38,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:38:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:38:38,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:38:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 06:38:38,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1781159459] [2020-12-09 06:38:38,142 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 06:38:38,142 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:38:38,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:38:38,142 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:38:38,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:38:38,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:38,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:38,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:38,499 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:38:38,838 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-09 06:38:39,156 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:38:39,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:38:39,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2020-12-09 06:38:39,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231110487] [2020-12-09 06:38:39,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 06:38:39,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:39,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 06:38:39,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-12-09 06:38:39,158 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand 10 states. [2020-12-09 06:38:39,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:39,252 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2020-12-09 06:38:39,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 06:38:39,253 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-09 06:38:39,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:39,253 INFO L225 Difference]: With dead ends: 78 [2020-12-09 06:38:39,253 INFO L226 Difference]: Without dead ends: 78 [2020-12-09 06:38:39,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-12-09 06:38:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-09 06:38:39,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-12-09 06:38:39,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-09 06:38:39,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 103 transitions. [2020-12-09 06:38:39,257 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 103 transitions. Word has length 13 [2020-12-09 06:38:39,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:39,257 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 103 transitions. [2020-12-09 06:38:39,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 06:38:39,257 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 103 transitions. [2020-12-09 06:38:39,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 06:38:39,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:39,258 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2020-12-09 06:38:39,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:38:39,459 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]=== [2020-12-09 06:38:39,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:39,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1717619208, now seen corresponding path program 1 times [2020-12-09 06:38:39,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:39,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371961949] [2020-12-09 06:38:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 06:38:39,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371961949] [2020-12-09 06:38:39,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608389469] [2020-12-09 06:38:39,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/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 [2020-12-09 06:38:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:39,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 06:38:39,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:38:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 06:38:39,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:38:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 06:38:39,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [55071723] [2020-12-09 06:38:39,637 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 06:38:39,637 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:38:39,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:38:39,637 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:38:39,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:38:39,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:39,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:39,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:40,012 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:38:40,350 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-09 06:38:40,662 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:38:40,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:38:40,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2020-12-09 06:38:40,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320351009] [2020-12-09 06:38:40,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 06:38:40,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:40,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 06:38:40,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-12-09 06:38:40,663 INFO L87 Difference]: Start difference. First operand 75 states and 103 transitions. Second operand 10 states. [2020-12-09 06:38:40,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:40,811 INFO L93 Difference]: Finished difference Result 120 states and 158 transitions. [2020-12-09 06:38:40,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 06:38:40,812 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-09 06:38:40,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:40,813 INFO L225 Difference]: With dead ends: 120 [2020-12-09 06:38:40,813 INFO L226 Difference]: Without dead ends: 120 [2020-12-09 06:38:40,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-12-09 06:38:40,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-09 06:38:40,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 74. [2020-12-09 06:38:40,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-09 06:38:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-12-09 06:38:40,819 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 14 [2020-12-09 06:38:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:40,819 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-12-09 06:38:40,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 06:38:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-12-09 06:38:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 06:38:40,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:40,820 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1] [2020-12-09 06:38:41,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:38:41,021 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]=== [2020-12-09 06:38:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:41,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1364564582, now seen corresponding path program 2 times [2020-12-09 06:38:41,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:41,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946637357] [2020-12-09 06:38:41,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 06:38:41,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946637357] [2020-12-09 06:38:41,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200500562] [2020-12-09 06:38:41,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/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 [2020-12-09 06:38:41,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 06:38:41,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:38:41,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 06:38:41,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:38:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 06:38:41,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:38:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 06:38:41,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1281470924] [2020-12-09 06:38:41,213 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 06:38:41,213 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:38:41,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:38:41,213 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:38:41,214 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:38:41,250 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:41,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:41,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:41,553 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:38:41,878 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-09 06:38:42,182 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:38:42,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:38:42,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 8 [2020-12-09 06:38:42,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3807400] [2020-12-09 06:38:42,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 06:38:42,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:42,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 06:38:42,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-12-09 06:38:42,184 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 10 states. [2020-12-09 06:38:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:42,239 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2020-12-09 06:38:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 06:38:42,239 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-12-09 06:38:42,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:42,240 INFO L225 Difference]: With dead ends: 92 [2020-12-09 06:38:42,240 INFO L226 Difference]: Without dead ends: 92 [2020-12-09 06:38:42,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-09 06:38:42,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-09 06:38:42,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2020-12-09 06:38:42,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-09 06:38:42,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2020-12-09 06:38:42,243 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 16 [2020-12-09 06:38:42,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:42,243 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2020-12-09 06:38:42,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 06:38:42,244 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2020-12-09 06:38:42,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 06:38:42,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:42,244 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1] [2020-12-09 06:38:42,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:38:42,446 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]=== [2020-12-09 06:38:42,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:42,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1721852877, now seen corresponding path program 2 times [2020-12-09 06:38:42,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:42,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452028223] [2020-12-09 06:38:42,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-09 06:38:42,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452028223] [2020-12-09 06:38:42,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298182018] [2020-12-09 06:38:42,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/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 [2020-12-09 06:38:42,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 06:38:42,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:38:42,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 06:38:42,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:38:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-09 06:38:42,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:38:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-09 06:38:42,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [803871270] [2020-12-09 06:38:42,655 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 06:38:42,655 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:38:42,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:38:42,655 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:38:42,655 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:38:42,693 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:42,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:42,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:42,985 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:38:43,330 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-09 06:38:43,662 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:38:43,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:38:43,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2020-12-09 06:38:43,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643925020] [2020-12-09 06:38:43,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 06:38:43,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:43,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 06:38:43,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-12-09 06:38:43,663 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand 15 states. [2020-12-09 06:38:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:43,907 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2020-12-09 06:38:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 06:38:43,907 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2020-12-09 06:38:43,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:43,908 INFO L225 Difference]: With dead ends: 86 [2020-12-09 06:38:43,908 INFO L226 Difference]: Without dead ends: 86 [2020-12-09 06:38:43,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2020-12-09 06:38:43,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-09 06:38:43,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2020-12-09 06:38:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-09 06:38:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-12-09 06:38:43,910 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 22 [2020-12-09 06:38:43,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:43,911 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-12-09 06:38:43,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 06:38:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-12-09 06:38:43,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-09 06:38:43,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:43,912 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-09 06:38:44,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2020-12-09 06:38:44,113 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]=== [2020-12-09 06:38:44,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:44,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1364720339, now seen corresponding path program 2 times [2020-12-09 06:38:44,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:44,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374104080] [2020-12-09 06:38:44,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-09 06:38:44,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374104080] [2020-12-09 06:38:44,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882473994] [2020-12-09 06:38:44,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:38:44,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 06:38:44,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:38:44,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 06:38:44,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:38:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-12-09 06:38:44,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:38:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-12-09 06:38:44,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 06:38:44,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7] total 11 [2020-12-09 06:38:44,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265581871] [2020-12-09 06:38:44,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 06:38:44,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:44,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 06:38:44,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-09 06:38:44,300 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 6 states. [2020-12-09 06:38:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:44,331 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-12-09 06:38:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 06:38:44,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-12-09 06:38:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:44,332 INFO L225 Difference]: With dead ends: 59 [2020-12-09 06:38:44,332 INFO L226 Difference]: Without dead ends: 58 [2020-12-09 06:38:44,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-09 06:38:44,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-09 06:38:44,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-12-09 06:38:44,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-09 06:38:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-09 06:38:44,335 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 39 [2020-12-09 06:38:44,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:44,335 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-09 06:38:44,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 06:38:44,335 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-09 06:38:44,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-09 06:38:44,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:44,336 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2020-12-09 06:38:44,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2020-12-09 06:38:44,538 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]=== [2020-12-09 06:38:44,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:44,539 INFO L82 PathProgramCache]: Analyzing trace with hash 643346751, now seen corresponding path program 1 times [2020-12-09 06:38:44,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:44,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49714348] [2020-12-09 06:38:44,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-09 06:38:44,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49714348] [2020-12-09 06:38:44,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082042215] [2020-12-09 06:38:44,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/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 [2020-12-09 06:38:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:44,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 06:38:44,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:38:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-09 06:38:44,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:38:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-09 06:38:44,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419670238] [2020-12-09 06:38:44,746 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 06:38:44,746 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:38:44,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:38:44,746 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:38:44,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:38:44,783 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:44,838 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:44,865 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:45,131 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:38:45,413 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-09 06:38:45,836 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:38:45,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:38:45,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2020-12-09 06:38:45,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559653212] [2020-12-09 06:38:45,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 06:38:45,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:45,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 06:38:45,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-12-09 06:38:45,838 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 13 states. [2020-12-09 06:38:46,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:46,006 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-12-09 06:38:46,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 06:38:46,007 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-12-09 06:38:46,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:46,007 INFO L225 Difference]: With dead ends: 70 [2020-12-09 06:38:46,007 INFO L226 Difference]: Without dead ends: 70 [2020-12-09 06:38:46,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-12-09 06:38:46,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-09 06:38:46,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2020-12-09 06:38:46,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-09 06:38:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-12-09 06:38:46,009 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 40 [2020-12-09 06:38:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:46,009 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-12-09 06:38:46,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 06:38:46,009 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-12-09 06:38:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-09 06:38:46,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:46,010 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2020-12-09 06:38:46,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2020-12-09 06:38:46,212 INFO L429 AbstractCegarLoop]: === Iteration 18 === [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]=== [2020-12-09 06:38:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash 195207405, now seen corresponding path program 2 times [2020-12-09 06:38:46,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:46,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283499533] [2020-12-09 06:38:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-09 06:38:46,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283499533] [2020-12-09 06:38:46,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700894214] [2020-12-09 06:38:46,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/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 [2020-12-09 06:38:46,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 06:38:46,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:38:46,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 06:38:46,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:38:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-09 06:38:46,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:38:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-09 06:38:46,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [742241215] [2020-12-09 06:38:46,443 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 06:38:46,443 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:38:46,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:38:46,443 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:38:46,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:38:46,479 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:46,537 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:46,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:46,853 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:38:47,119 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-09 06:38:47,539 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:38:47,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:38:47,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2020-12-09 06:38:47,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670297157] [2020-12-09 06:38:47,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 06:38:47,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:47,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 06:38:47,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2020-12-09 06:38:47,540 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 15 states. [2020-12-09 06:38:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:47,718 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2020-12-09 06:38:47,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 06:38:47,718 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-12-09 06:38:47,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:47,719 INFO L225 Difference]: With dead ends: 86 [2020-12-09 06:38:47,719 INFO L226 Difference]: Without dead ends: 86 [2020-12-09 06:38:47,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2020-12-09 06:38:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-09 06:38:47,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2020-12-09 06:38:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-09 06:38:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-12-09 06:38:47,721 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 46 [2020-12-09 06:38:47,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:47,721 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-12-09 06:38:47,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 06:38:47,721 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-12-09 06:38:47,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-09 06:38:47,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:47,722 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 4, 1, 1] [2020-12-09 06:38:47,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2020-12-09 06:38:47,923 INFO L429 AbstractCegarLoop]: === Iteration 19 === [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]=== [2020-12-09 06:38:47,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:47,924 INFO L82 PathProgramCache]: Analyzing trace with hash -468192513, now seen corresponding path program 3 times [2020-12-09 06:38:47,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:47,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893111859] [2020-12-09 06:38:47,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 57 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-09 06:38:48,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893111859] [2020-12-09 06:38:48,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103905839] [2020-12-09 06:38:48,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/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 [2020-12-09 06:38:48,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 06:38:48,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:38:48,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 06:38:48,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:38:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 140 proven. 118 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-09 06:38:48,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:38:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 140 proven. 118 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-09 06:38:48,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1356510724] [2020-12-09 06:38:48,249 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 06:38:48,249 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:38:48,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:38:48,249 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:38:48,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:38:48,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:48,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:48,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:48,591 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:38:48,980 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-09 06:38:49,305 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:38:49,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:38:49,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2020-12-09 06:38:49,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730318461] [2020-12-09 06:38:49,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-09 06:38:49,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:49,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-09 06:38:49,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2020-12-09 06:38:49,307 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 20 states. [2020-12-09 06:38:49,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:49,798 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-12-09 06:38:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-09 06:38:49,799 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-12-09 06:38:49,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:49,799 INFO L225 Difference]: With dead ends: 79 [2020-12-09 06:38:49,800 INFO L226 Difference]: Without dead ends: 79 [2020-12-09 06:38:49,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=404, Invalid=1666, Unknown=0, NotChecked=0, Total=2070 [2020-12-09 06:38:49,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-09 06:38:49,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-12-09 06:38:49,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-09 06:38:49,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-12-09 06:38:49,802 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 52 [2020-12-09 06:38:49,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:49,802 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-12-09 06:38:49,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-09 06:38:49,802 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-12-09 06:38:49,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-09 06:38:49,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:49,803 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 1, 1] [2020-12-09 06:38:50,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2020-12-09 06:38:50,004 INFO L429 AbstractCegarLoop]: === Iteration 20 === [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]=== [2020-12-09 06:38:50,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:50,004 INFO L82 PathProgramCache]: Analyzing trace with hash -168928524, now seen corresponding path program 4 times [2020-12-09 06:38:50,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:50,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813057665] [2020-12-09 06:38:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-09 06:38:50,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813057665] [2020-12-09 06:38:50,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021109589] [2020-12-09 06:38:50,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:38:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:50,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-09 06:38:50,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:38:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-09 06:38:50,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:38:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-09 06:38:50,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1468173549] [2020-12-09 06:38:50,461 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 06:38:50,461 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:38:50,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:38:50,461 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:38:50,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:38:50,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:50,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:50,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:50,802 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:38:51,196 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-09 06:38:51,570 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:38:51,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:38:51,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 17 [2020-12-09 06:38:51,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012446507] [2020-12-09 06:38:51,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-09 06:38:51,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:51,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-09 06:38:51,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-12-09 06:38:51,571 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 19 states. [2020-12-09 06:38:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:51,781 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2020-12-09 06:38:51,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 06:38:51,781 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-12-09 06:38:51,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:51,782 INFO L225 Difference]: With dead ends: 185 [2020-12-09 06:38:51,782 INFO L226 Difference]: Without dead ends: 185 [2020-12-09 06:38:51,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2020-12-09 06:38:51,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-09 06:38:51,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2020-12-09 06:38:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-09 06:38:51,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2020-12-09 06:38:51,785 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 61 [2020-12-09 06:38:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:51,786 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2020-12-09 06:38:51,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-09 06:38:51,786 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2020-12-09 06:38:51,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-09 06:38:51,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:51,787 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 5, 5, 4, 4, 1, 1, 1] [2020-12-09 06:38:51,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2020-12-09 06:38:51,988 INFO L429 AbstractCegarLoop]: === Iteration 21 === [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]=== [2020-12-09 06:38:51,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:51,989 INFO L82 PathProgramCache]: Analyzing trace with hash 563326648, now seen corresponding path program 3 times [2020-12-09 06:38:51,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:51,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542273575] [2020-12-09 06:38:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 350 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2020-12-09 06:38:52,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542273575] [2020-12-09 06:38:52,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457401820] [2020-12-09 06:38:52,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:38:52,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 06:38:52,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:38:52,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 06:38:52,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:38:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 31 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-09 06:38:52,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:38:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 31 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-09 06:38:52,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [835705301] [2020-12-09 06:38:52,569 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 06:38:52,569 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:38:52,569 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:38:52,569 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:38:52,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:38:52,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:52,666 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:52,698 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:52,959 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:38:53,281 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-09 06:38:53,827 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:38:53,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:38:53,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 26 [2020-12-09 06:38:53,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485440703] [2020-12-09 06:38:53,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-09 06:38:53,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:53,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-09 06:38:53,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260 [2020-12-09 06:38:53,829 INFO L87 Difference]: Start difference. First operand 185 states and 200 transitions. Second operand 27 states. [2020-12-09 06:38:54,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:54,239 INFO L93 Difference]: Finished difference Result 193 states and 207 transitions. [2020-12-09 06:38:54,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 06:38:54,240 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 76 [2020-12-09 06:38:54,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:54,241 INFO L225 Difference]: With dead ends: 193 [2020-12-09 06:38:54,241 INFO L226 Difference]: Without dead ends: 193 [2020-12-09 06:38:54,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=323, Invalid=1747, Unknown=0, NotChecked=0, Total=2070 [2020-12-09 06:38:54,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-09 06:38:54,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 188. [2020-12-09 06:38:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-09 06:38:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 202 transitions. [2020-12-09 06:38:54,244 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 202 transitions. Word has length 76 [2020-12-09 06:38:54,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:54,245 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 202 transitions. [2020-12-09 06:38:54,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-09 06:38:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 202 transitions. [2020-12-09 06:38:54,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-09 06:38:54,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:54,245 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 6, 6, 6, 6, 5, 5, 1, 1, 1] [2020-12-09 06:38:54,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:38:54,447 INFO L429 AbstractCegarLoop]: === Iteration 22 === [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]=== [2020-12-09 06:38:54,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:54,448 INFO L82 PathProgramCache]: Analyzing trace with hash -82073872, now seen corresponding path program 4 times [2020-12-09 06:38:54,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:54,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639151334] [2020-12-09 06:38:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-12-09 06:38:54,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639151334] [2020-12-09 06:38:54,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183479521] [2020-12-09 06:38:54,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:38:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:54,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 06:38:54,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:38:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 361 proven. 305 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-12-09 06:38:54,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:38:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 361 proven. 305 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-12-09 06:38:54,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1167346591] [2020-12-09 06:38:54,923 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 06:38:54,923 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:38:54,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:38:54,923 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:38:54,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:38:54,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:55,011 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:55,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:38:55,303 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:38:55,614 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-09 06:38:56,078 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:38:56,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:38:56,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 26 [2020-12-09 06:38:56,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307262245] [2020-12-09 06:38:56,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-09 06:38:56,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:56,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-09 06:38:56,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2020-12-09 06:38:56,079 INFO L87 Difference]: Start difference. First operand 188 states and 202 transitions. Second operand 27 states. [2020-12-09 06:38:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:57,054 INFO L93 Difference]: Finished difference Result 227 states and 240 transitions. [2020-12-09 06:38:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-09 06:38:57,054 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 97 [2020-12-09 06:38:57,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:57,055 INFO L225 Difference]: With dead ends: 227 [2020-12-09 06:38:57,055 INFO L226 Difference]: Without dead ends: 227 [2020-12-09 06:38:57,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=977, Invalid=5029, Unknown=0, NotChecked=0, Total=6006 [2020-12-09 06:38:57,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-09 06:38:57,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 206. [2020-12-09 06:38:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-09 06:38:57,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 219 transitions. [2020-12-09 06:38:57,060 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 219 transitions. Word has length 97 [2020-12-09 06:38:57,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:57,060 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 219 transitions. [2020-12-09 06:38:57,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-09 06:38:57,060 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 219 transitions. [2020-12-09 06:38:57,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-09 06:38:57,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:38:57,061 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 7, 7, 7, 6, 5, 5, 1, 1, 1] [2020-12-09 06:38:57,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:38:57,262 INFO L429 AbstractCegarLoop]: === Iteration 23 === [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]=== [2020-12-09 06:38:57,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:38:57,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1389824217, now seen corresponding path program 5 times [2020-12-09 06:38:57,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:38:57,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156729367] [2020-12-09 06:38:57,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:38:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:38:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 1135 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-12-09 06:38:57,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156729367] [2020-12-09 06:38:57,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142469591] [2020-12-09 06:38:57,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:38:57,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 06:38:57,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:38:57,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 06:38:57,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:38:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 1331 trivial. 0 not checked. [2020-12-09 06:38:57,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:38:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1331 trivial. 0 not checked. [2020-12-09 06:38:57,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 06:38:57,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 6] total 20 [2020-12-09 06:38:57,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593939420] [2020-12-09 06:38:57,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 06:38:57,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:38:57,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 06:38:57,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-12-09 06:38:57,770 INFO L87 Difference]: Start difference. First operand 206 states and 219 transitions. Second operand 7 states. [2020-12-09 06:38:57,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:38:57,835 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2020-12-09 06:38:57,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 06:38:57,835 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2020-12-09 06:38:57,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:38:57,835 INFO L225 Difference]: With dead ends: 204 [2020-12-09 06:38:57,835 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 06:38:57,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-12-09 06:38:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 06:38:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 06:38:57,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 06:38:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 06:38:57,836 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2020-12-09 06:38:57,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:38:57,836 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 06:38:57,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 06:38:57,836 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 06:38:57,836 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 06:38:58,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:38:58,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:38:58 BoogieIcfgContainer [2020-12-09 06:38:58,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 06:38:58,050 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 06:38:58,050 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 06:38:58,050 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 06:38:58,051 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:38:31" (3/4) ... [2020-12-09 06:38:58,058 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 06:38:58,077 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-12-09 06:38:58,077 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-09 06:38:58,077 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 06:38:58,103 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_700298b3-7681-4580-a624-a8f9b939faf7/bin/utaipan/witness.graphml [2020-12-09 06:38:58,103 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 06:38:58,104 INFO L168 Benchmark]: Toolchain (without parser) took 26853.48 ms. Allocated memory was 115.3 MB in the beginning and 188.7 MB in the end (delta: 73.4 MB). Free memory was 78.8 MB in the beginning and 131.9 MB in the end (delta: -53.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. [2020-12-09 06:38:58,104 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 115.3 MB. Free memory is still 95.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:38:58,104 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.91 ms. Allocated memory is still 115.3 MB. Free memory was 78.6 MB in the beginning and 92.8 MB in the end (delta: -14.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 06:38:58,104 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.30 ms. Allocated memory is still 115.3 MB. Free memory was 92.8 MB in the beginning and 91.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:38:58,105 INFO L168 Benchmark]: Boogie Preprocessor took 19.87 ms. Allocated memory is still 115.3 MB. Free memory was 91.3 MB in the beginning and 90.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:38:58,105 INFO L168 Benchmark]: RCFGBuilder took 302.16 ms. Allocated memory is still 115.3 MB. Free memory was 90.2 MB in the beginning and 68.2 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:38:58,105 INFO L168 Benchmark]: TraceAbstraction took 26274.48 ms. Allocated memory was 115.3 MB in the beginning and 188.7 MB in the end (delta: 73.4 MB). Free memory was 67.7 MB in the beginning and 134.3 MB in the end (delta: -66.6 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2020-12-09 06:38:58,105 INFO L168 Benchmark]: Witness Printer took 53.69 ms. Allocated memory is still 188.7 MB. Free memory was 134.3 MB in the beginning and 131.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:38:58,107 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 115.3 MB. Free memory is still 95.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 170.91 ms. Allocated memory is still 115.3 MB. Free memory was 78.6 MB in the beginning and 92.8 MB in the end (delta: -14.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.30 ms. Allocated memory is still 115.3 MB. Free memory was 92.8 MB in the beginning and 91.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.87 ms. Allocated memory is still 115.3 MB. Free memory was 91.3 MB in the beginning and 90.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 302.16 ms. Allocated memory is still 115.3 MB. Free memory was 90.2 MB in the beginning and 68.2 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 26274.48 ms. Allocated memory was 115.3 MB in the beginning and 188.7 MB in the end (delta: 73.4 MB). Free memory was 67.7 MB in the beginning and 134.3 MB in the end (delta: -66.6 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. * Witness Printer took 53.69 ms. Allocated memory is still 188.7 MB. Free memory was 134.3 MB in the beginning and 131.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: 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: 23]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 18]: 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: 18]: 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: 26.2s, OverallIterations: 23, TraceHistogramMax: 27, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 227 SDtfs, 1490 SDslu, 625 SDs, 0 SdLazy, 2809 SolverSat, 432 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1953 GetRequests, 1524 SyntacticMatches, 5 SemanticMatches, 424 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4047 ImplicationChecksByTransitivity, 12.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=206occurred in iteration=22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 23 MinimizatonAttempts, 314 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 1314 NumberOfCodeBlocks, 1116 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 1898 ConstructedInterpolants, 26 QuantifiedInterpolants, 648565 SizeOfPredicates, 54 NumberOfNonLiveVariables, 2466 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 55 InterpolantComputations, 12 PerfectInterpolantSequences, 6805/11381 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]: 693, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 12, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 33, TOOLS_POST_TIME[ms]: 303, 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: 32, TOOLS_QUANTIFIERELIM_TIME[ms]: 294, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 50, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 56, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 6, DOMAIN_JOIN_TIME[ms]: 206, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 3, DOMAIN_WIDEN_TIME[ms]: 124, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME[ms]: 12, DOMAIN_ISBOTTOM_APPLICATIONS: 12, DOMAIN_ISBOTTOM_TIME[ms]: 15, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 530, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 529, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 1, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 6, DAG_COMPRESSION_PROCESSED_NODES: 77, DAG_COMPRESSION_RETAINED_NODES: 31, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...